Siam Physics Congress 2017
Report of Contributions
https://indico.cern.ch/e/spc2007.physics.ku.ac.th Siam Physics Co … / Report of Contributions Non-Contact Radius Measurement …
Contribution ID: 4 Type: Oral
Non-Contact Radius Measurement Method of Spherical Standards Thursday, 25 May 2017 09:05 (15 minutes)
The diameter measurement of sphere is very important in dimensional metrology. The measure- ment of diameter is generally carried out by a comparison method or direct method using 1D linear measuring system. The probes touch both sides of the workpiece and the diameter is determined from displacement of the probes. The contact force is generally operated at 1N which yield defor- mation due to force of approximately 1 µm with uncertainty of ±0.1 µm. This system provides good performance but has a limitation when workpiece is made from soft matter or sensitive to scratch. National Institute of Metrology (Thailand) developed a laser interferometer system which is equipped with reference spherical lens in order to non-contact radius measurement of spherical objects pos- sible. Radius of completed sphere and partial sphere with radius range from 1 mm up to 50 mm can be measured with accuracy of ±2 µm.
Primary author: BUAJARERN, jariya (National Institute of Metrology (Thailand)) Co-authors: Mr TONMUEANWAI,Anusorn (National Institute of Metrology (Thailand)); Dr CHANTA- WONG, Narin (National Institute of Metrology (Thailand)); Mr MUAKNGAM, Yodying (Natonal Insti- tute of Metrology (Thailand))
Presenter: BUAJARERN, jariya (National Institute of Metrology (Thailand)) Session Classification: A8: Instrument I
Track Classification: Instrumentation, Metrology and Standards
October 2, 2021 Page 1 Siam Physics Co … / Report of Contributions Quantum reflection in the linearly …
Contribution ID: 5 Type: Poster
Quantum reflection in the linearly downward potential Wednesday, 24 May 2017 15:45 (15 minutes)
In this work, the motion of a particle in one dimension, under the influence of the potential well that is modeled as the linear downward of length L with a finite depth |V0|, is studied within the context of the non-relativistic quantum mechanics. The attention is paid on the paradoxical phe- nomenon of the reflection of a particle that is in contrast between classical and quantum physics. Classically, the reflection effect occurs only at a potential barrier. To demonstrate such counterintuitive phenomenon, the Schro¨dinger equation is solved to obtain the reflection coefficient in the scattering state by considering an incident particle withan energy E > 0, that is represented by a monochromatic plane wave, propagates freely from left to right, pass through the potential well. The continuity conditions at boundaries give the desired result that is expressed in terms of the Airy functions which depends on the incident energy E, the strength |V0| and the range L of the well. The value of the reflection coefficient R lies in the interval 0 ≤ R < 1, and its behavior is the decreasing function with respect to the range L.
Primary authors: Mr CHAMNAN, Noppasin (Burapha University); Dr KRUNAVAKARN, Boonlit (Burapha Univesity)
Presenters: Mr CHAMNAN, Noppasin (Burapha University); Dr KRUNAVAKARN, Boonlit (Burapha Univesity) Session Classification: Poster Presentation I
Track Classification: Physics Education
October 2, 2021 Page 2 Siam Physics Co … / Report of Contributions Simple Harmonics Motion experim …
Contribution ID: 6 Type: Poster
Simple Harmonics Motion experiment based on LabVIEW interface with Arduino Wednesday, 24 May 2017 15:45 (15 minutes)
In this work, we developed an innovative physics lab apparatus that is modern, cheap and simple. The ultrasonic sensor was used to measure the position of a mass attached on a spring asafunc- tion of time. The data acquisition system and control device were developed based on LabVIEW interface with Arduino. The experimental was designed to explain the simple harmonics motion similar to the wave propagation. The simple harmonic system (mass and spring) was observed and the motion can be realized using curve fitting to the wave equation in Mathematica. We found that the spring constants provided by Hook’s law and the wave equation fitting are in good agreement.
Primary author: Dr TONG-ON, Anusorn (Chiang Rai Rajabhat University) Co-authors: SAPHET, Parinya (CRRU); Dr THEPNURAT, Meechai (Chiang Rai Rajabhat Univer- sity)
Presenters: Dr TONG-ON, Anusorn (Chiang Rai Rajabhat University); SAPHET, Parinya (CRRU); Dr THEPNURAT, Meechai (Chiang Rai Rajabhat University) Session Classification: Poster Presentation I
Track Classification: Physics Education
October 2, 2021 Page 3 Siam Physics Co … / Report of Contributions One dimensional two-body collisio …
Contribution ID: 7 Type: Poster
One dimensional two-body collisions experiment based on LabVIEW interface with Arduino Wednesday, 24 May 2017 15:45 (15 minutes)
The purpose of this work is to build a physics lab apparatus that is modern, low-cost andsimple. In one dimensional two-body collisions experiment, we used the Arduino UNO R3 as a data acqui- sition system which was controlled by LabVIEW program. The photo gate sensors were designed using LED and LDR to measure position as a function of the time. Aluminum frame housewares and blower were used for the air track system. In both totally inelastic and elastic collision ex- periments, the results of momentum and energy conservation are in good agreement with the theoretical calculations.
Primary author: SAPHET, Parinya (CRRU) Co-authors: Dr TONG-ON, Anusorn (CRRU); Dr THEPNURAT, Meechai (Chiang Rai Rajabhat University)
Presenters: SAPHET, Parinya (CRRU); Dr TONG-ON, Anusorn (CRRU); Dr THEPNURAT, Meechai (Chiang Rai Rajabhat University) Session Classification: Poster Presentation I
Track Classification: Physics Education
October 2, 2021 Page 4 Siam Physics Co … / Report of Contributions A novel spectrometer based on the …
Contribution ID: 8 Type: Poster
A novel spectrometer based on the near-field Talbot effect Wednesday, 24 May 2017 15:45 (15 minutes)
By making use of advanced technique of the near-field Talbot effect, we design a novel spectrom- eter. Our method provides a compact and portable spectrometer according to the characteristic of the Talbot effect. Here, we propose the idea with the simulations done with reasonable values. With vibration and temperature adjustments, the high resolution over a range of a few nanometers can be obtained.
Primary authors: Mr SUTHAM, Withun (Department of Physics, Faculty of Science, Burapha Uni- versity, ChonBuri Province, 20131, Thailand); Dr SRISUPHAPHON, Sorakrai (Department of Physics, Faculty of Science, Burapha University, ChonBuri Province, 20131, Thailand); Dr WONGRACH, Kuna- ree (Department of Physics, Faculty of Science, Burapha University, ChonBuri Province, 20131, Thai- land); Dr DEACHAPUNYA, Sarayut (Department of Physics, Faculty of Science, Burapha University, ChonBuri Province, 20131, Thailand)
Presenter: Mr SUTHAM, Withun (Department of Physics, Faculty of Science, Burapha University, ChonBuri Province, 20131, Thailand) Session Classification: Poster Presentation I
Track Classification: Optics, Non-linear optics, Laser Physics, Ultrafast Phenomena
October 2, 2021 Page 5 Siam Physics Co … / Report of Contributions Effects of Relaxation on Drag Forc …
Contribution ID: 9 Type: Oral
Effects of Relaxation on Drag Force and Diffusivity of Highly Charged Spherical Particles in Cylindrical Pores Wednesday, 24 May 2017 13:30 (15 minutes)
Diffusion of macromolecules through nanopores of comparable sizes is affected by an interaction between the particle and the confining entities including both hydrodynamic and electrostatic in- teractions. The particle-pore hydrodynamic interaction causes an increase in the drag force exerted on the particle, resulting in the reduction of its diffusivity. If the particle is charged and submerged in an electrolytic solution, the particle motion creates a distortion of the electrical double layer, resulting in an excess retarding force added to the usual enhanced hydrodynamic drag. This is commonly known as the relaxation effect. In the present work, the excess force due to relaxation was evaluated from the finite element solution of the governing equations including Stokes equa- tion, Poisson’s equation and Nernst-Planck equations. The regular perturbation scheme involving the Peclet number was employed, considering the particle translocation as a perturbation on equi- librium state. The enhanced drag due to relaxation and the particle diffusivity are obtained for spherical particles confined in cylindrical pores where the particle and pore wall are of like charge and the electric potential of the system is high enough that the Poisson-Boltzmann could not be linearized. The obtained results are compared to effects of relaxation on drag force and diffusivity of macromolecules calculated by employing the perturbation involving the dimensionless surface charge density.
Primary author: YOOPRASERTCHUTI, Kittipitch Co-author: Dr DECHADILOK, Panadda Presenters: YOOPRASERTCHUTI, Kittipitch; Dr DECHADILOK, Panadda Session Classification: A1: Biological
Track Classification: Biological Physics and Biomedical Engineering
October 2, 2021 Page 6 Siam Physics Co … / Report of Contributions Confirmation of the relative gravit …
Contribution ID: 10 Type: Oral
Confirmation of the relative gravity measurement by the absolute gravimeter at NIMT Thursday, 25 May 2017 09:20 (15 minutes)
The local gravity measurement using relative gravimeter was confirmed to the reference absolute gravity station by National Institute of Metrology (Thailand); NIMT. Five known absolute gravity value stations were used in this confirmation. By applying the A-B-A measurement pattern, the time dependent of the relative gravity value at the reference station was calculated. Then the short term drift correction was introduce to the relative gravity reading of the loop. The relative gravity difference (∆grel ) was compared to the absolute gravity difference (∆gabs ) between A-B stations. Five measurement loops were given the maximum difference between ∆grel and ∆gabs of 0.012 mGal which is less than the absolute gravity uncertainty value of the station in that measurement loop. Therefore, the relative gravimeter is confirmed to report the local gravity value relyonthe reference absolute gravity station using daily measurement loop with A-B-A pattern.
Primary author: WORADET, Nattanan Co-author: PRIRUENROM, Tasanee (National Institute of Metrology (Thailand)) Presenters: WORADET, Nattanan; PRIRUENROM, Tasanee (National Institute of Metrology (Thai- land)) Session Classification: A8: Instrument I
Track Classification: Instrumentation, Metrology and Standards
October 2, 2021 Page 7 Siam Physics Co … / Report of Contributions Effect of doping by different transi …
Contribution ID: 12 Type: Poster
Effect of doping by different transition metal oxides on the elastic and structural properties of recycled borosilicate glasses Thursday, 25 May 2017 17:45 (15 minutes)
Recycled borosilicate glass (RBSG) was used a composition in 80RBSG–20Na2O glass systems doped with different transition metal oxides (TMOs) (where TMOs = V2O5, Cr2O3, CuO,ZnO, ZrO2, Ag2O and CdO). The ultrasonic velocities (both longitudinal and shear) of glass systems were measured by using pulse echo technique. Measurements were carried out at 4 MHz frequency at room temperature. The densities of the glasses were performed by Archimedes’ principle and used n-hexane as the immersion liquid. The elastic moduli, Poisson’s ratio and micro-harness are found to be rather sensitive to the glass composition. The obtained results were showed that the properties of glasses were decreased when doped the amount of TMOs. The amount of TMOs have the effect on rigidity of the glass network structure. These results related to thenumberof non-bridging oxygens (NBOs) and supported by FTIR spectroscopy.
Keyword: Recycle borosilicate glasses; Elastic moduli; Pulse-echo technique
Primary author: SOPAPAN, Poonnaphob (Department of Physics, Faculty of Science, Ubon Ratchathani University)
Co-authors: LAOPAIBOON, jintana (UBU); BOOTJOMCHAI, Cherdsak; JAIBOON, Oruethai; Prof. LAOPAIBOON, Rewat
Presenter: SOPAPAN, Poonnaphob (Department of Physics, Faculty of Science, Ubon Ratchathani University) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 8 Siam Physics Co … / Report of Contributions Ionic effects on the DNA denatura …
Contribution ID: 13 Type: Oral
Ionic effects on the DNA denaturation and DNA unzipping Thursday, 25 May 2017 16:35 (15 minutes)
The double-stranded DNA (dsDNA) that is separated and unwound changes its structure tothe single-stranded DNA (ssDNA) in response either to the thermal energy or to the external forces. For the former the thermally induced dsDNA-to-ssDNA transition, called DNA denaturation, oc- curs in the polymer chain reactions. For the latter the force induced dsDNA-to-ssDNA transition, called DNA unzipping, separates two strands and opens a room for RNA polymerase to transcribe the sequence of base pairs. In DNA denaturation increasing the temperature higher than melting temperature, T > Tm, results in ssDNA. In DNA unzipping pulling the strands with the force stronger than critical force, F > Fc, also results in ssDNA. In the temperature-force phase di- agram the critical force Fc(T ) is a boundary between the low temperature, small force phase of dsDNA and the high temperature, large force phase of ssDNA. The Na+ concentration dependence of Tm and Fc(T ) is studied by using the correspondence between the statistical mechanics and the time imaginary quantum mechanics. In the language of quantum mechanics the ssDNA emerges naturally as a delocalized state. Both melting temperature Tm and critical force Fc(T ) are found to rise with increasing the Na+ concentration in qualitative agreement with the calorimetric ex- periments measuring Tm and the single molecule experiments measuring Fc. The enhancement of DNA stability in the presence of Na+ ions establishes a notion of the electrostatic stiffening.
Primary author: Dr AMNUANPOL, Sitichoke (Physics department, Thammasat University) Presenter: Dr AMNUANPOL, Sitichoke (Physics department, Thammasat University) Session Classification: A15: Atomics
Track Classification: Atomic Physics, Quantum Physics, Molecular and Chemical Physics
October 2, 2021 Page 9 Siam Physics Co … / Report of Contributions Position Change of the Moon to sh …
Contribution ID: 14 Type: Poster
Position Change of the Moon to showing the Lunar Mansion’s Pattern Thursday, 25 May 2017 17:45 (15 minutes)
This research was conducted to find out the pattern of the lunar mansions from the positionchange of the Moon. These positions were called as the lunar mansions. The lunar mansions have27 groups with important 27 fixed stars. The Moon’s position was calculated from nearby starsby cosine formula. The smallest angular separation between the Moon and the fixed stars wasthe lunar mansion of the day. The graph relate with the date from 2011-2030 and the lunar mansions was showed the lunar mansion’s pattern. It was found that the lunar mansion’s pattern wasa linear equation as y = (0.9882x + 15.4192) ± 0.4318.
Primary author: Mr SUKWISOOT, Adisak Co-authors: LAPHIRATTANAKUL, Arthit; KOMONJINDA, Siramas Presenter: Mr SUKWISOOT, Adisak Session Classification: Poster Presentation II
Track Classification: Astronomy, Astrophysics, and Cosmology
October 2, 2021 Page 10 Siam Physics Co … / Report of Contributions Electrical properties and gas sensi …
Contribution ID: 15 Type: Poster
Electrical properties and gas sensing properties of TiO2/GO nanocomposites for CO2 sensor application Wednesday, 24 May 2017 15:45 (15 minutes)
Titanium dioxide (TiO2) nanostructures were prepared by microwave assisted and varying time. The morphology of TiO2 nanostructures were studied by scanning electron microscopy (SEM), X- ray diffraction (XRD), electrical and gas sensing properties. SEM images revealed nanoparticles cluster of prepared products. XRD patterns showed anatase phase of TiO2 with peak of(101), (004), (200), (105), (211) and (204). The I-V characteristics exhibited the behavior of the ohmic and diodes materials. The sensitivity was measured under CO2 atmosphere showed high sensitivity of TiO2/GO composites in 60 second at 2.54.
Primary author: Ms CHAIYO, Pitchanunt Co-authors: Ms DUANGSING, Benchamat; Ms THUMTHAN, Orathai; Ms NUTRIYA, Jeerapat; Mr PUKIRD, Supakorn
Presenter: Ms CHAIYO, Pitchanunt Session Classification: Poster Presentation I
Track Classification: Nanoscale Physics and Nanotechnology
October 2, 2021 Page 11 Siam Physics Co … / Report of Contributions A Characterization of Portable HF …
Contribution ID: 16 Type: Oral
A Characterization of Portable HF Air Plasma Jet Wednesday, 24 May 2017 16:00 (15 minutes)
A new portable low temperature plasma jet system is developed using ambient air as plasma gas. This atmospheric pressure plasma source is rich sources of reactive oxygen and nitrogen species (RONS) which play crucial roles in biomedical applications. Especially, Nitric oxide radical (NO), hydroxyl radical (OH) and ozone (O3) in this plasma source have been suggested to be powerful agents in wound healing, cancer therapy, sterilization, and dentistry. By varying the air flows, the plasma source can be optimized for nitric oxide, ozone and hydroxyl radical production. Optical emission spectroscopy (OES) was used to determined OH radical in the effluent of the plasma source for varied air flows. The concentration of NO and O3 has been investigated and measured by absorption spectroscopy and electrochemical detector at variable gas flows. Correlations between plasma parameters and concentrations as well as temperature of the effluent of the plasma source will be reported and discussed in this report.
Keyword: portable plasma jet, atmospheric pressure plasma, reactive oxygen and nitrogen species, biomedical applications.
Primary author: THANA, Phuthidhorn Co-author: BOONYAWAN, Dheerawan (Chiang Mai University) Presenter: THANA, Phuthidhorn Session Classification: A4: Plasma and Nuclear Fusion
Track Classification: Plasma and Ion Physics, Nuclear and Radiation Physics
October 2, 2021 Page 12 Siam Physics Co … / Report of Contributions On the λ-extended class of the can …
Contribution ID: 17 Type: Poster
On the λ-extended class of the canonical transformations Thursday, 25 May 2017 17:45 (15 minutes)
A new type of canonical transformations for the multiplicative Hamiltonian, which considered as a 1-parameter: λ-extended class from the standard additive form of the Hamiltonian, was found and called λ-extended class of the standard canonical transformations. The λ-extended canonical transformations could be treated as a generating function to produce an infinite hierarchy of the 4 standard types of the canonical transforms.
Primary authors: Mr SRISUKSON, Saksilpa (Sarasas Ektra School); Dr YOO-KONG, Sikarin (The- oretical and Computational Physics (TCP) Group)
Presenter: Mr SRISUKSON, Saksilpa (Sarasas Ektra School) Session Classification: Poster Presentation II
Track Classification: Statistical and Theoretical Physics
October 2, 2021 Page 13 Siam Physics Co … / Report of Contributions Supersymmetrizing a Quantum M …
Contribution ID: 18 Type: Oral
Supersymmetrizing a Quantum Mechanical System. Thursday, 25 May 2017 13:10 (15 minutes)
Supersymmetry (SUSY) is one of the most active fields of research in high-energy physics and particle physics. However, SUSY is not so easily accessible for students wishing to get started on this field of research due to complexities often associated with quantum field theories. Inthis talk, I’ll discuss some aspects of SUSY in the context of quantum mechanics. In particular, I’ll demonstrate how to supersymmetrize a familiar quantum system such as a harmonic oscillator and a square well.
Primary author: UTTAYARAT, Patipan Presenter: UTTAYARAT, Patipan Session Classification: A12: High Energy Physics
Track Classification: High Energy and Particle Physics
October 2, 2021 Page 14 Siam Physics Co … / Report of Contributions On the discrete-time two coupled …
Contribution ID: 19 Type: Oral
On the discrete-time two coupled harmonics oscillators Thursday, 25 May 2017 16:00 (15 minutes)
We take an assumption about the time variable in physics that actually the continuous time flow constitutes from in finite tiny discrete time steps resulting in different behavior of thesystem between these two time scales. To proof the assumption, the two coupled harmonic oscillators is studied as a toy model both in classical and quantum realms. In classical level, the discrete equation of motion is obtained as a discrete mapping. Under the continuum limit, a standard equation of motion is retrieved. In quantum level, the discrete wave function is obtained and interestingly the probability distribution is a bit broader than the usual one. Furthermore, the uncertainty principle in discrete-time case is modified by an extra-term containing a discrete-time parameter. Entanglement of the system is also studied by using the linear entropy in this discrete- time scale. The result shows that entanglement between two particles depends on the sizeofthe discrete-time step and the coupling constant. As expected, the standard entanglement behavior is recovered under the continuum limit. We find that the system evolves differently in discrete-time scale comparing to the continuous-time scale.
Primary author: Mr KANTAYASAKUN, Watcharanon (Department of physics , King Mongkut’s University of Technology Thonburi )
Co-authors: Dr TANASITTIKOSOL, Monsit (King Mongkut’s University of Technology Thonburi ); Dr YOO-KONG, Sikarin (King Mongkut’s University of Technology Thonburi ); Dr LIEWRIAN, Watchara (King Mongkut’s University of Technology Thonburi )
Presenters: Dr YOO-KONG, Sikarin (King Mongkut’s University of Technology Thonburi ); Mr KANTAYASAKUN, Watcharanon (Department of physics , King Mongkut’s University of Technology Thonburi ) Session Classification: A17: Statistical and Theoretical Physics
Track Classification: Statistical and Theoretical Physics
October 2, 2021 Page 15 Siam Physics Co … / Report of Contributions Performance of ZnO-doped recycl …
Contribution ID: 20 Type: Poster
Performance of ZnO-doped recycled window glass as a thermoluminescence dosimeter Wednesday, 24 May 2017 15:45 (15 minutes)
Thermoluminescence properties of Thai commercial window glass provided by Guardian Indus- tries Corporation (denoted as WG) were studied. WG was doped with varying concentrations of ZnO The composition of glass is 90WG-10Na2O-xZnO (where x = 0.000, 0.001, 0.010, 0.100, 1.000 mol%). Glass samples were recycled by using melt quenching technique and cut into the dimen- sions of 6×6×1 mm3. After irradiated glass samples with X-ray at photon energy 160 keV in absorb dose rang 0-14 mGy, the glow curve structure, TL sensitivity, linearity and minimum detectable were investigated.
Primary authors: Ms THUMSA-ARD, Thanaporn (Ubon Ratchathani University); Prof. LAOPAI- BOON, Jintana (Ubon Ratchathani University); Prof. LAOPAIBOON, Rewat (Ubon Ratchathani Univer- sity)
Presenter: Ms THUMSA-ARD, Thanaporn (Ubon Ratchathani University) Session Classification: Poster Presentation I
Track Classification: Plasma and Ion Physics, Nuclear and Radiation Physics
October 2, 2021 Page 16 Siam Physics Co … / Report of Contributions CuFeO2 formation using fused dep …
Contribution ID: 21 Type: Poster
CuFeO2 formation using fused deposition modeling 3D printing and sintering technique Thursday, 25 May 2017 17:45 (15 minutes)
CuFeO2 is a metal oxide mineral material which is called delafossite. It can potentially be used as a chemical catalyst, and gas sensing material. There are methods to fabricate CuFeO2 such as chemical synthesis, sintering, sputtering, and chemical vapor deposition. In our work, CuFeO2 is prepared by Fused Deposition Modeling (FDM) 3D printer. The composite filament which com- posed of Cu and Fe elements is printed in 3 dimensions, and then sintered and annealed at high temperature to obtain CuFeO2. Suitable polymer blend and maximum percent volume of metal powder are studied. When percent volume of metal powder is increased, melt flow rate of poly- mer blend is also increased. The most suitable printing condition is reported and the properties of CuFeO2 are observed by scanning electron microscopy, and dynamic scanning calorimeter, X-ray diffraction. As a new method to produce semiconductor, this technique has a potential to allowany scientist or students to design and print a catalyst or sensing material by the most conventional 3D printing machine which is commonly used around the world.
Primary authors: Mr SALEA, Ahamad (Advanced Material Processing Laboratory,Material sci- ence and engineering program, Faculty of science, Mahidol university, Bangkok, 10400, Thailand); Mr DASAESAMOH, Abedeen (Advanced Material Processing Laboratory, Material science and engineering program,Faculty of science, Mahidol university, Bangkok, 10400, Thailand); Mr PRATHUMWAN, Rat (Advanced Material Processing Laboratory, Material science and engineering program,Faculty of sci- ence, Mahidol university, Bangkok, 10400, Thailand); Mr KONGKAEW, Teerakorn (Advanced Material Processing Laboratory, Material science and engineering program, Material science and engineering program, Faculty of science, Mahidol university, Bangkok, 10400, Thailand)
Co-author: Dr SUBANNAJUI, Kittitat (Materials Science and Engineering, Multidisciplinary Unit, Faculty of Science, Mahidol University)
Presenter: Mr SALEA, Ahamad (Advanced Material Processing Laboratory,Material science and engineering program, Faculty of science, Mahidol university, Bangkok, 10400, Thailand) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 17 Siam Physics Co … / Report of Contributions Effect of Planar Electrode Shapes o…
Contribution ID: 22 Type: Poster
Effect of Planar Electrode Shapes on Paramecium Cell Lysis Performance in Microfluidic Systems Wednesday, 24 May 2017 15:10 (15 minutes)
Electrical cell lysis is an important technique in obtaining intracellular components for further analysis. In this research, three different array of shapes; comb, triangle, rectangle; of indium tin oxide (ITO) were fabricated for cell lysis in microfluidic systems. Paramecium sp. cells were
used in visualizing cell disruption due to the application of 12 Vp-p AC voltage between electrodes. From the observation, Paramecium cell membrane disruptions were more pronounced in trian- gle and rectangle electrodes. Electric field distribution inside microfluidic systems for three elec- trode shapes were simulated to confirm Paramecium’s transmembrane potential. Simulation re- sults agree with the experiments that triangle and rectangle shape produce high transmembrane potential when Paramecium cells are placed between electrodes.
Primary author: Ms AROONNITHI, Chanikan (Yupparaj Wittayalai School) Co-authors: Mr JITVISATE, Monchai (MESA+ Institute of Nanotechnology, Faculty of Science and Technology, University of Twente, Netherlands); Dr PUSSADEE, Nirut (Plasma and Beam Physics Re- search Facility, Department of Physics and Materials Science, Faculty of Science, Chiang Mai Univer- sity)
Presenter: Ms AROONNITHI, Chanikan (Yupparaj Wittayalai School) Session Classification: Poster Presentation I
Track Classification: Biological Physics and Biomedical Engineering
October 2, 2021 Page 18 Siam Physics Co … / Report of Contributions Fabrication and Physical Propertie …
Contribution ID: 23 Type: Poster
Fabrication and Physical Properties of Titanium Nitride/Hydroxyapatite Composite on Polyether Ether Ketone by RF Magnetron Sputtering Technique Wednesday, 24 May 2017 15:45 (15 minutes)
Titanium nitride coatings have been used very successfully in a variety of applications because of their excellent properties, such as the high hardness meaning good wear resistance and also used for covering medical implants. Hydroxyapatite is a bioactive ceramic that contributes to the restoration of bone tissue, which together with titanium nitride may contribute to obtaining a su- perior composite in terms of mechanical and bone tissue interaction matters. This paper aim to optimize deposition conditions for films synthesis on PEEK by varying sputter- ing parameters such as nitrogen flow rate and direction, deposition time, d-s (target-to-substrate distance) and 13.56 MHz RF power. The plasma conditions used to deposit films were monitored by the optical emission spectroscopy (OES). Titanium nitride/Hydroxyapatite composite films were performed by gas mixture with nitrogen and argon ratio of 1:3 and target-to-substrate distance at 8 cm. The gold color, as-deposited film was found on PEEK with high hardness and higher surface energy than uncoated PEEK.
Keyword: Titanium Nitride, Hydroxyapatite, RF magnetron sputtering, Polyether ether ketone
Primary author: NUPANGTHA, Wasin (Chiang Mai University) Co-author: Dr BOONYAWAN, Dheerawan (Chiang Mai University) Presenter: NUPANGTHA, Wasin (Chiang Mai University) Session Classification: Poster Presentation I
Track Classification: Plasma and Ion Physics, Nuclear and Radiation Physics
October 2, 2021 Page 19 Siam Physics Co … / Report of Contributions Design and construction of portab …
Contribution ID: 24 Type: Poster
Design and construction of portable survey meter Thursday, 25 May 2017 17:30 (15 minutes)
This work was aimed to design and construction of portable survey meter for radiation dosemea- suring. The designed system consists of 6 parts including GM-tube radiation detector, low voltage power supply, high voltage power supply, pulse conditioning, processing and display on android phone. The test results indicated that the ripple voltage of low and high voltage powersupply were less than 1%. The maximum integral counts were found to be 3×105 cps. It was foundthat the developed system had small size and light weight for portable measuring system.
Primary author: Mr SINGSEETA, Warut (Ubon Ratchathani University) Co-authors: Mr THONG-ARAM, Decho (Chulalongkorn University); Dr PENCHAREE, Somkid (Ubon Ratchathani University)
Presenter: Mr SINGSEETA, Warut (Ubon Ratchathani University) Session Classification: Poster Presentation II
Track Classification: Instrumentation, Metrology and Standards
October 2, 2021 Page 20 Siam Physics Co … / Report of Contributions Search for Galactic Dark Matter fr …
Contribution ID: 25 Type: Oral
Search for Galactic Dark Matter from Gamma-ray Spectral Lines with Fermi-LAT Data Thursday, 25 May 2017 07:45 (15 minutes)
Most of the matter in the universe is invisible and is known as dark matter (DM). Weakly Interact- ing Massive Particles (WIMPs) are possible theoretical candidates to explain DM. Hypothetically, WIMPs can be detected indirectly by their annihilation or decay products. A possible product is gamma ray. Many DM profile models predict higher density of WIMPs near the Galactic center. In this work, we consider monochromatic gamma-ray emission from the Galactic center region measured by the Large Area Telescope (LAT), the main instrument onboard the Fermi Gamma-ray Space Telescope. We present preliminary results of the analysis of gamma-ray spectral lines to search for DM annihilation or decay signals using the latest version of the LAT data.
Primary author: Ms THANAPREECHANAN, Natthakan Co-authors: MITTHUMSIRI, Warit; RUFFOLO, David (Mahidol University) Presenter: Ms THANAPREECHANAN, Natthakan Session Classification: A7: Astronomy I
Track Classification: Astronomy, Astrophysics, and Cosmology
October 2, 2021 Page 21 Siam Physics Co … / Report of Contributions Mechanical Properties of Cement/ …
Contribution ID: 27 Type: Poster
Mechanical Properties of Cement/Bacterial Nano-Cellulose Composite Thursday, 25 May 2017 17:45 (15 minutes)
Cement is a very important material for building and construction but the main drawback is its brittleness due to high porosity. The brittleness of cement was found to be improved byreinforcing the cement matrix with celluloses extracted from plants. In present work, we studied another type of natural cellulose produced by bacteria, i.e. bacterial nano-cellulose (BNC). The BNC was obtained from the coconut jelly (nata de coco) by cleaning, blending, freeze-drying, and blending again to produce finely dispersed BNC ready to be mixed into cement paste. The liquid tocement ratio was set to 0.45 and the BNC of 0.1, 0.3, 0.5 and 0.7 wt% was added to the mixture. The workability of each mix was tested and controlled. After casting, the samples were demolded after 1 day and soaked in Ca(OH)2 solution. At 7 and 28 days age, the samples were tested for mechanical properties: compressive and flexural strengths. It was found that with the appropriate amount of BNC reinforcement, the brittleness of the cement paste composites could be improved. However, excessive amount of BNC degraded both compressive and flexural strengths. The scanning electron microscope (SEM) was used to observed the fracture surfaces of the samples after mechanical tests. The change in mechanical properties could be explained from the distribution of BNC in thecement matrix.
Primary authors: Mr PALAPORN, Dulayawit (Khon Kaen University); Ms PAYAKANITI, Panjasil (Khon Kaen University); Dr PINITSOONTORN, Supree (Khon Kaen University) Presenter: Mr PALAPORN, Dulayawit (Khon Kaen University) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 22 Siam Physics Co … / Report of Contributions Synthesis and properties of cobalt …
Contribution ID: 28 Type: Poster
Synthesis and properties of cobalt ferrite nanoparticles in bacterial cellulose nanofiber scaffold Thursday, 25 May 2017 17:45 (15 minutes)
Cobalt ferrite nanoparticle (NP) is a class of ferrite which has a potential for many applications but the agglomeration of magnetic NPs limits its full potential usage. In this research, cobalt ferrite NPs were synthesized in the presence of bacterial cellulose (BC) nanofibers which acted as the scaf- folding templates. The BC was obtained from a commercially available nata de coo (coconut jelly) which was washed and rinsed in water several times before the freeze-drying process was applied. The cobalt ferrite was synthesized by using a coprecipitation method. In the presence of bacterial cellulose, FeCl2.6H2O and CoCl2.6H2O at the right stoichiometric ratio were mixed in deionized water. After that, NaOH was added to create the precipitation of cobalt ferrite NPs on thesurface of the BC nanofibers. In this experiment, the concentration of chloride salt was varied andthe method of BC drying was explored. The X-ray diffraction (XRD) patterns revealed the formation of the cobalt ferrite crystalline structures. The scanning electron microscope (SEM) showed the morphology of cobalt ferrite NPs which formed the nanotube-like structure surrounding the BC nanofibers. The thermal analysis showed the several weight loss characteristics and the thermal stability of NPs in BC scaffold up to 800 ℃. The Fourier transform infrared spectroscopy (FTIR) showed the characteristic peaks of O-H and C-O groups. Vibrating sample magnetometer (VSM) was used to study the magnetic properties of cobalt ferrite NPs in BC scaffold. The saturation magnetization was found to be influenced by the initial concentration of Fe and Co ions, andthe drying processes.
Keywords: cobalt ferrite; nanoparticles; bacterial cellulose; magnetic properties;
Primary author: Ms PHOOPHATHONG, Kanchanok (Khon Kaen University) Co-authors: Ms SRIPLAI, Nipaporn (Khon Kaen University); Dr MONGKOLTHANARUK, Wiyada (Khon Kaen University); Dr PINITSOONTORN, Supree (Khon Kaen University) Presenter: Ms PHOOPHATHONG, Kanchanok (Khon Kaen University) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 23 Siam Physics Co … / Report of Contributions Effect of Bacterial Cellulose and its…
Contribution ID: 29 Type: Poster
Effect of Bacterial Cellulose and its Carbon Nanofiber Derivatives Addition on the Compressive Strength of Cement Paste Composite. Thursday, 25 May 2017 17:45 (15 minutes)
The mechanical properties of cementitious materials, widely applied in construction, could beim- provedby reinforcement with cellulosic natural fibres. In this study, another type of natural fibers, i.e. the bacterial cellulose (BC) obtained from coconut jelly (nata de coco) was added to cement paste to form the reinforced composites. The coconut jelly was thoroughly washed and blended prior to mixing with cement pastes. Up to 15 wt% of BC was added to the cement paste. The workability of the cement composites was controlled to be the same for every mix. The samples were then tested for compressive strength at the age of 7 and 28 days. The improving trend of the properties for BC-cement composites was not clearly seen. However, when the BC was py- rolyzed, carbon nanofibers (CNF) were obtained. The cement pastes with CNF addition showedan improvement for their compressive strength. The strength increased with CNF amount and aging time. The morphology of both BC-cement and CNF-cement composites at their fracture surfaces was observed under scanning electron microscopy (SEM). The correlation between the mechanical property and microstructure was discussed.
Keywords: Bacterial Cellulose; Carbon Nanofiber; Cement; Compressive Strength
Primary author: Mr PARSE, Nuttawat (Khon Kaen University) Co-authors: Dr PINITSOONTORN, Supree (Khon Kaen University); Ms PAYAKANITI, Panjasil Payakaniti (Khon Kaen University)
Presenter: Mr PARSE, Nuttawat (Khon Kaen University) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 24 Siam Physics Co … / Report of Contributions Effect of Carbon Fiber and Nano- …
Contribution ID: 30 Type: Poster
Effect of Carbon Fiber and Nano-Silica Addition on the Microstructure, Electrical and Mechanical Properties of Fly Ash Geopolymer Thursday, 25 May 2017 17:45 (15 minutes)
Geopolymer is an environmental friendly construction material which has a potential for replacing cement. In the present study, the addition of carbon fiber and nano-silica in geopolymer paste was studied in terms of the electrical and mechanical properties, and the microstructure. The geopoly- mer paste was made from fly ash by blending it inNa2SiO2/NaOH solution using the liquid/ash ratio of 0.4. Up to 2 wt% of nano-silica and 5 wt% of carbon fiber were added in geopolymer paste. In each mix, the workability of the paste was tested and controlled using a mini-slump test. After casting, the composite pastes were cured at 25C or 60C for 24 hr. The property and microstruc- ture measurements were performed at 7, 14 and 28 days. For the electrical property, the I-V curve of each sample was measured using a 4-point probe method. The electrical resistivity generally increased with nano-silica addition but decreased with carbon fiber content. On the other hand, mechanical test showed that the compressive strength did not have a clear trend when any addi- tive was mixed. The phase formation and functional groups were analysed using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) while the fractured surface morphology after compression was investigated under a scanning electron microscope (SEM).
Keywords: geopolymer; carbon fiber; nano-silica; electrical property; compressive strength
Primary authors: Mr BOOMPRASERT, Pichainarong (Khon Kaen university ); Ms PAYAKANITI, Panjasil (Khon Kaen university ); Dr PINITSOONTORN, Supree (Khon Kaen university ) Presenter: Mr BOOMPRASERT, Pichainarong (Khon Kaen university ) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 25 Siam Physics Co … / Report of Contributions Mechanical and Electrical Properti …
Contribution ID: 31 Type: Oral
Mechanical and Electrical Properties of Fly Ash Geopolymer Composited with Short Carbon Fibre Thursday, 25 May 2017 13:30 (15 minutes)
Workability, compressive strength and electrical properties of high calcium (Class C) fly ash geopoly- mer composited with short carbon fibre (CF) were investigated. The liquid to ash (L/A) ratio was kept at 0.4, while the carbon fibre concentration, curing temperature and age of the specimens were varied. The fibre content was in a range of 0-0.5%CF. The curing temperature was25℃and 60℃ and the specimens were tested at the age of 7, 14 and 28 days. The workability of freshly mixed geopolymer paste was tested by miniature slump cone testing method. The workability de- creased when higher content of CF was added. However, the compressive strength was improved and reached the maximum value of 31.3 MPa at 0.5%CF. I-V curve measurement and cyclic voltam- metry (CV) techniques were used for electrical properties determination. The alternative current, with the maximum current of 100 mA, was applied to the specimens. It was found that the CF concentration significantly affected the electrical resistivity. The lowest resistivity was obtained with 0.5%CF addition. For 25℃ curing, longer curing day led to the increase in electrical resistivity whereas it was almost unchanged for 60℃ curing temperature. In the case of CV measurement, the measurement was carried out at 28 days age. The CV curves showed the dependence on curing temperature, CF content and scan rate. X-ray diffraction pattern and Fourier transform infrared spectra confirmed that CF addition did not change the chemical structure of the geopolymer.
Keyword: fly ash geopolymer; geopolymer composite; carbon fibre; electrical properties; mechan- ical properties
Primary author: Ms PAYAKANITI, Panjasil (Khon Kaen University) Co-author: Mr PINITSOONTHORN, Supree (Khon Kaen University) Presenter: Ms PAYAKANITI, Panjasil (Khon Kaen University) Session Classification: A13: Material Physics
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 26 Siam Physics Co … / Report of Contributions Mechanical properties of cement p …
Contribution ID: 32 Type: Poster
Mechanical properties of cement paste containing iron powder Wednesday, 24 May 2017 15:45 (15 minutes)
Mechanical properties of cement paste containing iron powder Nattapong Chuewongkam1, Panjasil Payakaniti2,Supree Pinitsoontorn1,2,3 1Department of Physics, Faculty of Science, KhonKaen University, KhonKaen 40002 THAILAND 2 Materials Science and Nanotechnology Program, Department of Physics, Faculty of Science, KhonKaen University, KhonKaen 40002, Thailand 3Integrated Nanotechnology Research Center, Department of Physics, Faculty of Science, KhonKaen University, KhonKaen 40002 THAILAND Abstract This research project studied the mechanical properties of the iron paste containing metal powder. The amounts of the iron powder additives were 10, 20, 30, 40, 50, 60 and 70% by weight ofcement. Water to cement ratio was controlled by measuring workability. The universal testing machine as used to measure mechanical property. Which showed that adding iron powder enhanced the compressive strength of the cement paste. The microstructure was studied by using a scanning electron microscope. The correlation between microstructure and strength was discussed.
Keywords: Cement paste; Iron powder; Compressive Strength
Primary authors: Mr CHUEWONGKAM, Nattapong (Department of Physics); Ms PAYAKANITI, Panjasil (Khon Kaen University); Mr PINITSOONTORN, Supree (Khon Kaen University) Presenter: Mr CHUEWONGKAM, Nattapong (Department of Physics) Session Classification: Poster Presentation I
Track Classification: Nanoscale Physics and Nanotechnology
October 2, 2021 Page 27 Siam Physics Co … / Report of Contributions Liquid absorption using 3D carbon …
Contribution ID: 33 Type: Poster
Liquid absorption using 3D carbon nanofiber scaffolding derived from bacterial cellulose Wednesday, 24 May 2017 15:45 (15 minutes)
ABSTRACT 3D carbon nanofiber scaffolding was produced from the pyrolysis of freeze-dried (FD) bacterial cel- lulose (BC). The thermogravimetry and differential thermal analysis (TG/DTA) showed the weight loss of BC during the pyrolysis process. The X-ray diffraction technique showed the high crys- tallinity of the FD-BC and the high amorphousness of the carbon nanofibers. Both FD-BC and the pyrolyzed carbon nanofibers consisted of tiny fibers with the size of<100 nm. The liquidab- sorption capacity using FD-BC and carbon nanofibers was tested by measured the weight before and after absorption. It was found that the FD-BC was good for water absorption due tothehy- drophilic nature of the sample. For the organic solvent, ethanol, methanol, benzene, and palm oil, the hydrophobic carbon nanofibers had the absorption capacity of nearly hundred times oftheir own weight.
Primary author: Mr SOMBAT, Surachat (Khon Kaen University) Co-authors: Ms SRIPLAI, Nipaporn (Khon Kaen University); Dr PINITSOONTORN, Supree (Khon Kaen University)
Presenter: Mr SOMBAT, Surachat (Khon Kaen University) Session Classification: Poster Presentation I
Track Classification: Nanoscale Physics and Nanotechnology
October 2, 2021 Page 28 Siam Physics Co … / Report of Contributions Gamma-ray shielding and structur …
Contribution ID: 35 Type: Poster
Gamma-ray shielding and structural properties of strontium–lead–silicate glasses Thursday, 25 May 2017 17:45 (15 minutes)
The gamma-ray attenuation coefficients of strontium–lead–silicate glasses have been measuredby using a narrow beam transmission technique for gamma ray photon energies at 122, 662, 1173 keV and X-ray attenuation technique for gamma ray photon energies at 74.228 keV. These coefficients were then used to obtain the values of mass attenuation coefficients and half value layer. Inorder to evaluate gamma-ray shielding properties for glass samples, mass attenuation coefficients have been calculated with the WinXcom computer software. The results have been used to calculate half value layer parameters. The molar volume, FTIR, longitudinal velocity and longitudinal modulus have been used to study the structural properties of the prepared glass system.
Keywords: Glasses, Radiation shielding, Gamma-ray attenuation coefficients
Primary author: GUNHAKOON, Pattaranipa (Department of Physics, Faculty of Science, Ubon Ratchatani University, Warinchamrab, Ubon Ratchatani, 34190,Thailand.)
Co-authors: JAIBOON, Oruethai; PENCHAREE, Somkid; LAOPAIBOON, Jintana (UBU); Mr LAOPAIPOON, Raewat; Mr YENCHAI, Chadet (Chulalongkorn University) Presenter: GUNHAKOON, Pattaranipa (Department of Physics, Faculty of Science, Ubon Ratchatani University, Warinchamrab, Ubon Ratchatani, 34190,Thailand.) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 29 Siam Physics Co … / Report of Contributions Role of ilmenite micro-inclusion o …
Contribution ID: 37 Type: Poster
Role of ilmenite micro-inclusion on Fe oxidation state of natural sapphires Thursday, 25 May 2017 17:45 (15 minutes)
The blue color of the blue sapphire is caused by the Fe-Ti pairs. Recently, the oxidation statesofFe and Ti on high-quality blue sapphire were found as Fe3+ and Ti4+. However, the oxidation state of Fe on natural sapphire with some inclusions was reported as mixing of Fe2+ and Fe3+ using the x- ray absorption near edge structure spectroscopy (XANES). Generally, there are mineral inclusions on natural sapphire related to Fe such as hematite (Fe2O3) and ilmenite (FeTiO3). In this study, we investigate the micro-inclusions on natural sapphires by the electron probe micro analyzer (EPMA). The oxidation states of Fe and Fe-O bond length were analyzed by x-ray absorption spectroscopy (XAS). The Fe K-edge EXAFS fitting results focused on the first shell of Fe atoms on high-quality natural sapphires were shown that the Fe-O bond length on α-Al2O3 was fitted well with Fe-O 3+ bond length on Fe2O3 presenting Fe . However, the Fe-O bond length on natural sapphires with 2+ 3+ ilmenite micro-inclusion was fitted with Fe-O bond length onFe3O4 showing Fe and Fe . As the result, the Fe2+ on natural sapphires was caused by the ilmenite micro-inclusion.
Primary author: Mr MONARUMIT, Natthapong (Kasetsart University) Co-authors: Dr SATITKUNE, Somruedee (Kasetsart University); Dr WONGKOKUA, Wiwat (Kaset- sart University)
Presenter: Mr MONARUMIT, Natthapong (Kasetsart University) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 30 Siam Physics Co … / Report of Contributions Photometric Investigation of Nova …
Contribution ID: 38 Type: Poster
Photometric Investigation of Novae T Pyx, BT Mon and V574 Pup Thursday, 25 May 2017 17:45 (15 minutes)
Recurrent novae (RNe) are novae with multiple recorded outbursts powered by a thermonuclear runaway. This occurs on the surface of the white dwarf in a close binary system inwhichalate type main-sequence or giant secondary star is filling its Roche lobe and transferring material onto the white dwarf primary star. They resemble classical novae (CNe) outbursts in several aspects and by definition, certain of CNe will join the class of RNe when a second major outburst is recorded. RNe play an important role as one of the suspected progenitor systems of Type Ia supernovae (SNe) which are used as primary distance indicators in cosmology. Thus, it is important to investigate the nature of central binary systems of CNe and RNe to determine the relation between the parameters of the central system and outburst type and finally ascertain the population of objects that might ultimately be candidates for Type Ia SNe explosions. The proposal that RNe occupy a region sepa- rated from CNe in an outburst amplitude versus speed class diagram was adopted. Since the low amplitude results from the existence of an evolved secondary and/or high mass transfer rate in the quiescent system, RNe candidates should accordingly have low amplitude. The catalog of 93 novae with observed V amplitudes given in the literature was used to select the target novae suspected to be RNe candidates via spectroscopic investigation. We selected 3 preliminary targets including T Pyx, BT Mon and V574 Pup which are suspected RNe candidates based on their low amplitudes and their visibility. We obtained their magnitudes at quiescence using ULTRASPEC spectrograph on the 2.4-m Thai National Telescope. The plots of targets on near-infrared CMD suggest thatall three should have main-sequence secondary stars. This is true for T Pyx, whose secondary star has been confirmed spectroscopically to be a main-sequence star, but not yet confirmed forBT Mon and V574 Pup.
Primary authors: Mr THIPBOON, Ritthichai (Chiang Rai Rajabhat University); Mr KAEWRAK- MUK, Meticha (Chiang Rai Rajabhat University); Dr SURINA, Farung (Chiang Rai Rajabhat Univer- sity); Dr SANGUANSAK, Nuanwan (SUT, NARIT) Presenter: Dr SURINA, Farung (Chiang Rai Rajabhat University) Session Classification: Poster Presentation II
Track Classification: Astronomy, Astrophysics, and Cosmology
October 2, 2021 Page 31 Siam Physics Co … / Report of Contributions A Study of Star Formation by Hα …
Contribution ID: 39 Type: Poster
A Study of Star Formation by Hα Emission of Galaxies in the Galaxy Group NGC 4213 Thursday, 25 May 2017 17:45 (15 minutes)
This research aims to study hydrogen alpha emission, corresponding to star formation of galaxies in the NGC 4213 group that has an average recession velocity of 6,821 km/s. The imaging obser-
vations with broad-band filters (B, V and RC) and narrow-band filters ([S II] and Red-continuum) were carried out from the 2.4-m reflecting telescope at Thai National Observatory (TNO). There are 11 sample galaxies in this study, consisting of 3 elliptical, 1 lenticular and 7 spiral galaxies. It was found that the late-type galaxies tend to be bluer than early-type galaxies, due to these galaxies consist of relatively high proportion of blue stars. Furthermore, the equivalent width of hydrogen alpha (EW(Hα)) tends to increase as a function of morphological type. This indicates that star for- mation in late-type galaxies taking place more than the early-type galaxies. Furthermore, a ratio of the star formation rate to galaxy mass also increases slightly with the galaxy type. This could be due to the interaction between galaxy-galaxy or tidal interaction occurring within the galaxy group.
Primary author: MAUNGKORN, Sakdawoot Co-author: Dr KRIWATTANAWONG, Wichean (Department of Physics and Materials Science, Fac- ulty of Science, Chiang Mai University, Chiang Mai, Thailand)
Presenter: MAUNGKORN, Sakdawoot Session Classification: Poster Presentation II
Track Classification: Astronomy, Astrophysics, and Cosmology
October 2, 2021 Page 32 Siam Physics Co … / Report of Contributions Observation of Spin Seebeck Effect …
Contribution ID: 40 Type: Poster
Observation of Spin Seebeck Effect in Bulk Strontium Ferrite Wednesday, 24 May 2017 15:45 (15 minutes)
ABSTRACT Spin Seebeck effect (SSE) can be observed in magnetized ferromagnetic materials when subjected to a temperature gradient.In this work, the results on the SSE in the bulk strontium ferrite were demonstrated for the first time. The SSE measurement was developed in our lab and calibrated with a Y3Fe5O12 standard sample. The bulk strontium ferrite was characterized for the crystal structure and magnetic properties. It was then cut, ground and polished, before the Pt film was deposited on the surface. When subjected to the magnetic field and temperature gradient, the strontium ferrite showed the SSE signal which could be measured via the inversed spin Hall effect (ISHE). The SSE voltages measured across the Pt film showed the dependence on the magnetic field, the temperature gradient, and the Pt thickness, with the maximum signal of about 200 nV/K.
Primary author: Mr SUKSAWAT, Champ (Khon Kaen University) Co-authors: Mr WONGJOM, Poramed (Khon Kaen University); Mr PINITSOONTORN, Supree (Khon Kaen University)
Presenter: Mr SUKSAWAT, Champ (Khon Kaen University) Session Classification: Poster Presentation I
Track Classification: Nanoscale Physics and Nanotechnology
October 2, 2021 Page 33 Siam Physics Co … / Report of Contributions A Study of Ferrofluid Shape Forma …
Contribution ID: 41 Type: Poster
A Study of Ferrofluid Shape Formation under Influence of Magnetic Field from Various Permanent Magnet Shapes Wednesday, 24 May 2017 15:45 (15 minutes)
When ferrofluid is in a presence of external magnetic field, different peak patterns areformed depending upon shape and magnetic field strength of permanent magnets. In this study, 2 dimen- sional magnetic field distribution from different magnet shapes were mapped and compared with the simulated magnetic field distribution in order to use magnetic field strength at particular loca- tion to calculate magnetic force exerting on ferrofluid. Balance between ferrofluid surface tension and magnetic force on ferrofluid leads to a good approximation of peak pattern distribution of ferrofluid.
Primary authors: Mr SANGHONG, Tananut (Chiang Mai University Demonstration School); Mr KAEWWICHIAN, Tanabodee (Chiang Mai University Demonstration School)
Co-author: Dr PUSSADEE, Nirut (Plasma and Beam Physics Research Facility, Department of Physics and Materials Science, Faculty of science, Chiang Mai University)
Presenters: Mr SANGHONG, Tananut (Chiang Mai University Demonstration School); Mr KAEWWICHIAN, Tanabodee (Chiang Mai University Demonstration School) Session Classification: Poster Presentation I
Track Classification: Physics Education
October 2, 2021 Page 34 Siam Physics Co … / Report of Contributions Application of tapered glass capill …
Contribution ID: 42 Type: Poster
Application of tapered glass capillary microbeam in MeV-PIXE mapping of longan leaf for elemental concentration distribution analysis Wednesday, 24 May 2017 15:45 (15 minutes)
The aim of this study was to understand elemental concentration distribution in local longan leaves for revealing whether and how the plant was affected by the environment or agricultural oper- ation since longan trees were normally heavily sprayed with fertilizer and pesticide and chem- ical residues might be long lasted on the leaves. The analysis was carried out using the MeV- microbeam particle induced X-ray emission (PIXE) mapping technique which was achieved by a home-developed tapered glass capillary microbeam system based on the 1.7-MV tandem accelera- tor and its ion beam analysis beam line at Chiang Mai University. The microbeam was coming from the capillary with a 100-µm-diameter exit and the ion beam was of 2-MeV proton. This study was interested in difference in the elemental concentration and distribution between the leaf midrib and lamina areas. In the measurement, the micro proton beam after the tapered glass capillary an- alyzed the leaf sample at a fixed spot of about 150 µm in diameter for 1000 seconds, while theleaf held on the sample stage was translated step by step over a 1,350-µm range across the leaf midrib edge to the leaf lamina area, resulting in total 9 data requisition spots to realize a scanning of the interesting area. The resulting data were colored to form a map of the elemental concentration distribution. Analysis from the map revealed 7 dominant elements, which were Al, S, Cl, K, Ca, Sc and Fe. It was interestingly found that in the midrib region, Al, S, Cl, K, Ca, Sc were relatively higher in concentration than in the lamina area, while the Fe concentration was in an opposite trend to that of the others. The only indication of fertilizer and pesticide elements detected inthe leaf sample was of K.
Primary author: Mr NATYANUN, Sirawut (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand)
Co-authors: YU, Liangdeng (Thailand Center of Excellence in Physics); Dr PUSSADEE, Nirut (Plasma and Beam Physics Research Facility, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thiland ); Dr UNAI, Somrit (Division of Physics, School of Science, University of Phayao 19 Moo 2 Tambon Maeka Amphur Muang Phayao, 56000, THAI- LAND); Dr TIPPAWAN, Udomrat (Plasma and Beam Physics Research Facility, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)
Presenters: YU, Liangdeng (Thailand Center of Excellence in Physics); Dr PUSSADEE, Nirut (Plasma and Beam Physics Research Facility, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thiland ); Mr NATYANUN, Sirawut (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand) Session Classification: Poster Presentation I
Track Classification: Plasma and Ion Physics, Nuclear and Radiation Physics
October 2, 2021 Page 35 Siam Physics Co … / Report of Contributions Effects of the temperature on the r…
Contribution ID: 43 Type: Oral
Effects of the temperature on the reconnection properties Wednesday, 24 May 2017 16:15 (15 minutes)
In magnetized plasma systems, magnetic reconnection is the most important process in converting the magnetic energy into the kinetic energy of plasma. It is conventionally thought that the outflow speed and the reconnection rate depend only on the strength of the upstream magnetic field and the upstream plasma density. However, using fully kinetic particle-in-cell simulations of collisionless reconnection with different values of temperature, we show surprising results that, unlike the conventional belief, the outflow speed and the reconnection rate decrease when the temperature increases. The physics of these unexpected results will also be discussed.
Primary authors: Dr MALAKIT, Kittipat (Thammasat University); Ms KIEOKAEW, Rungployphan (Mahidol University); Mr HAGGERTY, Colby (University of Delaware); Prof. RUFFOLO, David (Mahi- dol University); Prof. SHAY, Michael (University of Delaware); Dr CASSAK, Paul (West Virginia University)
Presenter: Dr MALAKIT, Kittipat (Thammasat University) Session Classification: A4: Plasma and Nuclear Fusion
Track Classification: Plasma and Ion Physics, Nuclear and Radiation Physics
October 2, 2021 Page 36 Siam Physics Co … / Report of Contributions Cambodian students’ prior knowle …
Contribution ID: 46 Type: Oral
Cambodian students’ prior knowledge of projectile motion Wednesday, 24 May 2017 13:45 (15 minutes)
Students always bring intuitive ideas about physics into classes, which can impact how they learn and how successful they are. To examine what Cambodian students think about projectile motion, we have developed seven open-ended questions and applied to grade 11 before (N=124) and after (N=131) conventional classes. Results revealed several consistent misconceptions, for instance, many students believed that the direction of a velocity vector of a projectile follows the trajectory at every position. They also thought the direction of an acceleration (or a force) follows the direction of motion. Two objects, which freely fall from the same height, spend different time to reach the floor because of different paths of motion. The greater angle of the launched projectile createsthe greater horizontal range. The hand force imparted with the ball leads the ball goes straight tohit the target. The acceleration direction points from the higher position to lower position. These misconceptions will be used as primary resources to invent instructional instruments to promote Cambodian students’ understanding on projectile motion concepts in a following work.
Primary author: Ms PITEN, So (Prince of Songkla University) Co-author: Dr RAKKAPAO, Suttida (Prince of Songkla University) Presenter: Ms PITEN, So (Prince of Songkla University) Session Classification: A2: Phys Ed, Plasma, and Nuclear Fusion
Track Classification: Physics Education
October 2, 2021 Page 37 Siam Physics Co … / Report of Contributions Characteristics of Linear Variable …
Contribution ID: 47 Type: Oral
Characteristics of Linear Variable Differential Transformer(LVDT) Probe for Gauge Blocks Calibration. Thursday, 25 May 2017 09:35 (15 minutes)
The LVDT probe is a very important component used in gauge blocks calibration via a mechanical comparative method. The probe is used to determine the central length difference between aref- erence gauge block and gauge block under-tested (UTC). Typically, an UTC and a reference gauge block have the same nominal length. However, some gauge blocks UTC are specially made for specific purpose where the reference gauge blocks with the same nominal length are notcommer- cially available. Various reference gauge blocks are wrung in order to provide nominal length the same as that of the UTC. Wringing process is the troublesome step and causes larger measurement uncertainty. The lower accuracy is higher number of gauge block used to create reference gauge block, in order to improve accuracy of measurement, the LVDT probe was used at the longer range where the reference gauge block and the UTC don’t need to be the same nominal length. In this paper, characteristics of LVDT probe was investigated as it is related to the accuracy of the mea- surement result. Errors of LVDT probe came from non-linearity, calibration factor, retrace error, repeatability and maximum difference in length. A pair of gauge block, calculated by the Twyman- Green interferometer, length different range 5 µm to 250 µm was used in the study. Non-linearity of LVDT is evaluated by a simple linear regression model. The non-linearity of LVDT probe, cali- bration factor, retrace error, repeatability and maximum difference in length are 25 nm, 1.0003, 3 nm, 6 nm and 80 µm, respectively. Therefore, by using this technique, central length difference between the 2 gauge blocks up to 80 µm can be calibrated with the uncertainty due to non-linearity of 15 nm The experiment shows the large error of retrace closes to0.15 µm at 250 µm. This can be determined the maximum difference in length to calibrate gauge blocks at difference nominal lengths. The measurement uncertainty of non-linearity is evaluated and it is close to15nm.
Primary author: Mr PEINGBANGYANG, Samana (National Institute of Metrology (Thailand))
Co-author: Mr WONGSAROJ, Jedsada (National Institute of Metrology (Thailand)) Presenter: Mr PEINGBANGYANG, Samana (National Institute of Metrology (Thailand)) Session Classification: A8: Instrument I
Track Classification: Instrumentation, Metrology and Standards
October 2, 2021 Page 38 Siam Physics Co … / Report of Contributions Spectroscopic properties for identi …
Contribution ID: 48 Type: Poster
Spectroscopic properties for identifying sapphire samples from Ban Bo Kaew, Phrae Province, Thailand Thursday, 25 May 2017 17:10 (50 minutes)
Gemstone commercial is a high revenue for Thailand especially ruby and sapphire. Moreover, Phrae is a potential gem field located at the northern part of Thailand. The studies of spectro- scopic properties are mainly to identify gemstone using advanced techniques (e.g. UV-Vis-NIR spectroscopy, FTIR spectroscopy and Raman spectroscopy). Typically, UV-Vis-NIR spectroscopy is a technique to study the cause of color in gemstones. FTIR spectroscopy is a technique to study the functional groups in gem-materials. Raman pattern can be applied to identify the mineral in- clusions in gemstones. In this study, the natural sapphires from Ban Bo Kaew were divided into two groups based on colors including blue and green. The samples were analyzed by UV-Vis-NIR spectrometer, FTIR spectrometer and Raman spectroscope for studying spectroscopic properties. According to UV-Vis-NIR spectra, the blue sapphires show higher Fe3+/Ti4+ and Fe2+/Fe3+ ab- sorption peaks than those of green sapphires. Otherwise, green sapphires display higher Fe3+/Fe3+ absorption peaks than blue sapphires. The FTIR spectra of both blue and green sapphire samples show the absorption peaks of –OH,-CH and CO2. The mineral inclusions including zircon, feldspar, rutile and ferrocolumbite in sapphires from this area were observed by Raman spectroscope. The spectroscopic properties of sapphire samples from Ban Bo Kaew, Phrae Province, Thailand are applied to be the specific evidence for gemstone identification.
Primary author: MOGMUED, Jidapa (Department of Earth Sciences, Faculty of Science, Kasetsart University)
Co-authors: Mr MONARUMIT, Natthapong (Kasetsart University); Dr WON-IN, Krit (Department of Earth Sciences, Faculty of Science, Kasetsart University); SATITKUNE, Somruedee Presenter: MOGMUED, Jidapa (Department of Earth Sciences, Faculty of Science, Kasetsart Univer- sity) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 39 Siam Physics Co … / Report of Contributions Study of the efficiency calibrations …
Contribution ID: 49 Type: Poster
Study of the efficiency calibrations of HPGe detector for the PGNAA system Wednesday, 24 May 2017 15:45 (15 minutes)
One of the most important part of the Prompt Gamma Neutron Activation Analysis system (PG- NAA) is the High Purity Germanium detector (HPGe). In this paper, the calibrations of an HPGe detector were made with the isotopic source 152Eu. The same detector was modelled in the MCNP5 and simulated. The thickness of the dead layer was determined. The simulated and experimental efficiency over the energy range ofthe 152Eu are compared observing a satisfactory agreement.
Primary author: Mr RATANATONGCHAI, Wichian (Thailand Institute of Nuclear Technology (Public Organization))
Co-author: SANGAROON, Siriyaporn (Mahasarakham University) Presenter: Mr RATANATONGCHAI, Wichian (Thailand Institute of Nuclear Technology (Public Organization)) Session Classification: Poster Presentation I
Track Classification: Plasma and Ion Physics, Nuclear and Radiation Physics
October 2, 2021 Page 40 Siam Physics Co … / Report of Contributions Simulations of the South Pole Neu …
Contribution ID: 50 Type: Oral
Simulations of the South Pole Neutron Monitors Thursday, 25 May 2017 08:00 (15 minutes)
Cosmic rays are high energy particles traveling nearly the speed of light through space. When cos- mic rays enter the earth’s atmosphere, they interact with nucleons and start a chain reactions that produce showers of secondary particles, including neutrons, that can reach the surface These neu- trons are detected by neutron monitors placed around the globe. The number of neutrons recorded by a neutron monitor depends on the state of the earth’s magnetosphere, which can be modulated by solar activity. In this sense neutron monitors observe space weather. UW-River Falls maintains neutron monitors at the South Pole, McMurdo Station, and on campus. To better understand the data from neutron monitors, Monte Carlo simulations are done. A response function, which char- acterizes the rates of particles detected, can be used to compare different configurations of neutron monitors. Simulations of different types of neutron monitors with the same incident flux ofcosmic rays and same atmospheric conditions are used to investigate the response functions. We deter- mined the response function of five different types of neutron monitors without simulating the buildings housing them. We then extended the simulations to explore the effects the physical en- vironment has on the count rates of twelve neutron monitors tubes at the Amundsen-Scott Station at the South Pole. Results of the simulated response functions of five types of neutron monitors tubes along with the preliminary results of environmental effects on twelve neutron monitors at the South Pole will be presented.
Primary authors: Mr AHLSWEDE, Mitchell (University of Wisconsin-River Falls ); Dr NUN- TIYAKUL, Waraporn (Chandrakasem Rajabhat University); Prof. MADSEN, Jim (University of Wis- consin-River Falls); Dr SEUNARINE , Suruj (University of Wisconsin-River Falls); Mr JANTHON, Patanachai (Chandrakasem Rajabhat University)
Presenter: Mr AHLSWEDE, Mitchell (University of Wisconsin-River Falls ) Session Classification: A7: Astronomy I
Track Classification: Astronomy, Astrophysics, and Cosmology
October 2, 2021 Page 41 Siam Physics Co … / Report of Contributions A New Proficiency Testing (PT) E …
Contribution ID: 51 Type: Oral
A New Proficiency Testing (PT) Evaluation for Conformity Assessment of Roughness Measuring Instruments Thursday, 25 May 2017 09:50 (15 minutes)
Surface finishing is an important process for manufacturing industries. Precise surface roughness measurement is crucial as it has a direct effect on surface quality. In Thailand, the National In- stitute of Metrology of Thailand (NIMT) provides reference roughness standards and roughness measuring instruments. NIMT also conduct Proficiency Testing (PT), which is an important pro- cess for conformity assessment. PT assesses a laboratory’s ability to perform a measurement and is one way to improve the measurement quality of laboratories. In this work, PT was conducted based on a portable roughness tester as a standard measuring instrument. There were seven cali- bration laboratories from Thailand that participated in the PT with a technical protocol thatwas designed by NIMT. The roughness tester was provided by NIMT. Two roughness standards with different roughness values (Ra ≤1 and Ra >1) were prepared by each calibration laboratory. The PT measurands were common roughness parameters such as Ra, Rz and Rsm. As the roughness measuring instrument is based on LVDTs, we propose here a new proficiency testing evaluation which involves the calibration of the measuring instrument in the PT evaluation procedure. The PT results, according to ISO/IEC 17043, shows that six out of the seven participating laboratories indicated satisfactory performance (|En| ≤ 1) where the measurement uncertainty was based on a 95% confidence level. The PT results and evaluation procedure for conformity assessment of the roughness measuring instrument are presented. Finally, measurement techniques to improve measurement quality are recommended.
Primary author: Dr TEPPITAKSAK, Achaya (National Institute of Metrology (Thailand)) Co-author: Dr BUAJARERN, Jariya (National Institiute of Metrology (Thailand)) Presenter: Dr TEPPITAKSAK, Achaya (National Institute of Metrology (Thailand)) Session Classification: A8: Instrument I
Track Classification: Instrumentation, Metrology and Standards
October 2, 2021 Page 42 Siam Physics Co … / Report of Contributions Non-centrosymmetric CePt3Si and …
Contribution ID: 53 Type: Oral
Non-centrosymmetric CePt3Si and CePt3B and their mechanical properties Thursday, 25 May 2017 08:40 (15 minutes)
The first non-centrosymmetric heavy fermion superconductor CePt3Si [1], crystallizing with CePt3B -type, without an inversion symmetry (one of the key symmetries for Cooper pairing) shows a num- ber of novel physical properties. In order to get insight into the pressure dependence of the strong electron correlations in these materials the present paper provides mechanical property data (elas- tic moduli and hardness both at room temperature as well as thermal expansion in the range from 4.2 to 670 K) for both single and poly-crystalline CePt3Si and its prototype compound CePt3B. The experimental data are backed by first-principles (ab-initio) calculation. Resonant ultrasound spectroscopy was used to determine elastic properties (Young’s elastic modulus E and Poissons ratio ν) via the eigenfrequencies of the sample and the knowledge of sample mass and dimensions. Bulk modulus and shear modulus were calculated from E and ν, and with Anderson’s equation the respective Debye temperatures were derived. In addition, ab-initio DFT calculations were car- ried out for both compounds. A comparison with parameters evaluated from these first-principles computations with the experiments revealed, in general, good agreement. Positive and negative thermal expansion values obtained from CePt3Si single crystal data are fairly well explained in terms of the crystalline electric field model, using CEF parameters derived re- cently from inelastic neutron scattering. The DFT calculations, in addition, demonstrate thatthe atomic vibrations keep almost unaffected by the antisymmetric spin-orbit coupling present insys- tems with crystal structures having no inversion symmetry. This is opposite to electronic prop- erties, where the antisymmetric spin-orbit interaction has shown to distinctly influence features like the superconducting condensate of CePt3Si.
[1] E. Bauer, G. Hilscher, H. Michor, C. Paul, E.W. Scheidt, A. Grybanov, Yu. Seropegin, H. Noel, M. Sigrist and P. Rogl; “Heavy Fermion Superconductivity and Magnetic Order in Non-centrosymmetric CePt3Si”, Phy. Rev. Lett., 92, 027003 (2004)1-4.
Primary author: Dr ROGL, Gerda (Christian Doppler Laboratory Univ. and Univ of Technology, Vienna, Austria)
Co-authors: Dr LEGUT, Dominik (IT4 Innovations Centre, Technical University of Ostrava); Prof. BAUER, Ernst (Solid State Physics, Vienna University of Technology); Dr PUCHEGGER, Stephan (Fac- ulty of Physics, University of Vienna); Prof. MUELLER, Herbert (Solid State Physics, Vienna University of Technology); Prof. ROGL, Peter (Institute of Materials Chemistry and Research, University of Vi- enna)
Presenter: Dr ROGL, Gerda (Christian Doppler Laboratory Univ. and Univ of Technology, Vienna, Austria) Session Classification: A6: Condensed Matter and Accelerators
Track Classification: Condensed Matter Physics
October 2, 2021 Page 43 Siam Physics Co … / Report of Contributions The Effect of Epoxy Molding Com…
Contribution ID: 54 Type: Poster
The Effect of Epoxy Molding Compound Floor Life to Reliability Performance and mold ability for QFN Package Thursday, 25 May 2017 17:45 (15 minutes)
This research studied about an epoxy molding compound (EMC) floor life to reliability performance of integrated circuit (IC) package. Molding is the process for protecting the die of IC package form mechanical and chemical reaction from external environment by shaping EMC. From normal manufacturing process, the EMC is stored in the frozen at 5 C and left at around room temperature for aging time or floor life before molding process. The EMC floor life effect to its propertiesand reliability performance of IC package. Therefore, this work interested in varied the floor lifeof EMC before molding process to analyze properties of EMC such as spiral flow length, gelation time, and viscosity. In experiment, the floor life of EMC were varied to check the effect ofits property to reliability performance. The EMC floor life were varied from 0 hours to 60hours with a step of 12 hours and observed wire sweep, incomplete EMC, and delamination inside the packages for 3x3, 5x5 and 8x8 mm2 of QFN packages. The evaluation showed about clearly effect of EMC floor life to IC packaging reliability. EMC floor life is not any concern for EMC property, moldabilty, and reliability from 0 hours to 48 hours for molding process of 3x3,5x5 and 8x8 mm2 QFN packaging manufacturing.
Keywords: Integrated circuit (IC) packaging, epoxy molding compound (EMC), molding com- pound floor life, gelation time
Primary author: Mr PEANPU-NGA, Udom (Student) Presenter: Mr PEANPU-NGA, Udom (Student) Session Classification: Poster Presentation II
Track Classification: Magnetic and Semiconductor Physics
October 2, 2021 Page 44 Siam Physics Co … / Report of Contributions Low Temperature Reduction of Gr …
Contribution ID: 55 Type: Poster
Low Temperature Reduction of Graphene Oxide by Plasma Processes Thursday, 25 May 2017 17:10 (50 minutes)
Graphene oxide (GO) is graphene sheet laced with oxygen-containing functional groups that lo- cated at edge of the lattice. The properties of GO can be modified depending on the degreeof reduction of oxygen-containing functional groups. Typical methods to reduce GO include wet chemical processes and thermal annealing in which hazardous chemical substances and high tem- perature are applied. In this work, plasma processes are conducted to reduce GO. GO films on silicon substrates are exposed to argon plasma generated by a radio frequency (RF) discharge. By superimposing pulsed negative voltage at 5 kV to the substrate holder, argon ions in the plasma can be accelerated to interact with GO. The duty cycle of the pulse will be varied therefore GO samples undergo plasma treatment and ion implantation alternately. Changes in atomic composi- tions and structure are analyzed using X-ray photoelectron spectroscopy, atomic force microscope and Raman spectroscopy. Reduced GO can be obtained with a hybrid process at low temperature.
Primary author: Mr SOONTHORNNANT, Krisada (Department of Physics and Materials Science Faculty of Science, Chiangmai University Chiangmai, Thailand)
Co-author: Dr CHAIWONG, Chanokporn (Department of Physics and Materials Science Faculty of Science, Chiangmai University Chiangmai, Thailand)
Presenter: Mr SOONTHORNNANT, Krisada (Department of Physics and Materials Science Faculty of Science, Chiangmai University Chiangmai, Thailand) Session Classification: Poster Presentation II
Track Classification: Material Physics and Functional Materials
October 2, 2021 Page 45 Siam Physics Co … / Report of Contributions Thermoelectric Half Heusler phase …
Contribution ID: 56 Type: Invited Speaker
Thermoelectric Half Heusler phases to harvest waste heat Thursday, 25 May 2017 09:50 (25 minutes)
Thermoelectric materials have the ability to convert a heat flow into an electrical charge carrierflow (energy flow). TiNiSn-based thermoelectric half-Heusler phases (noncentrosymmetric, cubic MgAgAs- type) have proven to be excellent thermoelectrics. The large-scale production and particularly nanos- tructuring of materials by preferably system-inherent phases need a profound knowledge not only of isothermal phase relations, temperature dependent solubilities but also of the solidification behavior. The present paper covers a detailed experimental investigation of the constitution of the [Ti,Zr]-Ni-Sn systems including a liquidus projection and a Scheil diagram, as well as a CALPHAD calculation of the entire constitution diagrams. For the binary systems TiNiSn-ZrNiSn and TiNiSn-HfNiSn, thermody- namic spinodal/binodal curves have been determined from solubility data and DFT calculations. With the relevant elastic moduli also the corresponding critical points of coherent spinodal demixing were calculated.
From a series of compounds Ti1-x-yZrxHfyNiSn and respective Sn/Sb substituted alloys the thermoelec- tric behavior was characterized in the temperature range from 4.2 to 875 K. Due to a particularly low thermal conductivity at a high Seebeck coefficient, Hf-containing n-type alloy reached a figure of merit
ZT = 1.5 at 850 K whereas for Hf-free, n-type Ti0.5Zr0.5NiSn0.98Sb0.02 a ZT ~ 1.2 at 850 K was found yielding an thermoelectric leg-efficiency of η ~ 11
Primary author: Prof. ROGL, Peter (1Christian Doppler Laboratory for Thermoelectricity at the Institute of Materials Chemistry and Research, University of Vienna)
Co-authors: Dr GRYTSIV, Andriy (Christian Doppler Laboratory for Thermoelectricity ); Mr SAUERSCHNIG, Philipp (Institut für Physikalische Chemie,Univ. Vienna); Prof. VRESTAL, Jan (De- partment of Chemistry, Masaryk University, Brno, Czechia); Prof. YUBUTA, Kunio (Institute for Ma- terials Research, Tohoku University, Sendai, Japan); Dr ROGL, Gerda (Christian Doppler Laboratory for Thermoelectricity ); Prof. BAUER, Ernst (Christian Doppler Laboratory for Thermoelectricity, In- stitute of Solid State Physics, Vienna University of Technology ); Dr ROMAKA, Vitaliy (Department of Materials Science and Engineering,Lviv, Ukraine)
Presenter: Prof. ROGL, Peter (1Christian Doppler Laboratory for Thermoelectricity at the Institute of Materials Chemistry and Research, University of Vienna) Session Classification: A6: Condensed Matter and Accelerators
Track Classification: Condensed Matter Physics
October 2, 2021 Page 46 Siam Physics Co … / Report of Contributions Warpage of QFN Package in Post …
Contribution ID: 57 Type: Poster
Warpage of QFN Package in Post Mold Cure Process of integrated circuit packaging Thursday, 25 May 2017 17:45 (15 minutes)
This research studied about warpage of QFN package in post mold cure process of integrated cir- cuit (IC) packages using pre-plated (PPF) leadframe. For IC package, epoxy molding compound (EMC) are molded by cross linking of compound stiffness but incomplete crosslinked network and leading the fully cured thermoset by post mold cure (PMC) process. The cure temperature of PMC can change microstructure of EMC in term of stress inside the package and effect to warpage of the package due to coefficient of thermal expansion (CTE) between EMC and leadframe. In experiment, cure temperatures were varied to check the effect of internal stress due to different cure temperature after completed post mold cure for TDFN-8L. The cure temperature were varied with 180℃, 170 ℃, 160 ℃, and 150℃ with cure time 4 and 6 hours, respectively. For analysis, the TDFN-8L packages were analyzed the warpage by thickness gauge and scanning acoustic micro- scope (SAM) after take the test samples out from the oven cure. The results confirmed thateffectof different CTE between EMC and leadframe due to different cure temperature resulting towarpage of the TDFN-8L packages.
Primary author: SRIWITHOON, NATTHA Co-authors: Dr UGSORNRAT, Kessararat; Mr SRISUWITTHANON , Warayoot; Dr THONGLOR, Panakamon
Presenter: SRIWITHOON, NATTHA Session Classification: Poster Presentation II
Track Classification: Magnetic and Semiconductor Physics
October 2, 2021 Page 47 Siam Physics Co … / Report of Contributions Development of TPF-1 Plasma Foc …
Contribution ID: 58 Type: Oral
Development of TPF-1 Plasma Focus for Education Wednesday, 24 May 2017 16:30 (15 minutes)
The plasma focus is a device that uses high voltage and electromagnetic force to induce plasma generation and acceleration, in order to cause nuclear reactions. Radiation of various types (X-ray, gamma ray, electrons, ions, neutrons) can be generated using this method during the pinch phase, thus making the plasma focus able to serve as a radiation source. Material testing, modification, and identification are among the current applications of the plasma focus. Other than beingan alternative option to isotopic sources, the plasma focus, which requires multidisciplinary team of personnel to design, operate, and troubleshoot, can also serve as an excellent learning device for physics and engineering students in the fields including, but not limited to, plasma physics, nuclear physics, electronics engineering, and mechanical engineering. This work describes the parameters and current status of Thai Plasma Focus 1 (TPF-1) and the characteristics of the plasma being produced in the machine using a Rogowski coil.
Primary author: Dr PICHA, Roppon Co-authors: PROMPING, Jiraporn; CHANNUIE (TUNG), Jatechan; POOLYARAT, Nopporn; SAN- GAROON, Siriyaporn (Mahasarakham University); TRAIKOOL, Tipwimol Presenter: Dr PICHA, Roppon Session Classification: A4: Plasma and Nuclear Fusion
Track Classification: Plasma and Ion Physics, Nuclear and Radiation Physics
October 2, 2021 Page 48 Siam Physics Co … / Report of Contributions Giant dielectric properties with ex …
Contribution ID: 59 Type: Oral
Giant dielectric properties with excellent temperaturestability of (Ga0.5Nb0.5)xTi1-xO2 ceramics Thursday, 25 May 2017 13:45 (15 minutes)
In this work, we investigate the giant dielectric properties of (Ga0.5Nb0.5)xTi1-xO2(where x=0.01, 0.025, 0.05 and 0.1) prepared by a solid state reaction method.The phase composition,microstructure,and oxidation statesare characterized by X-ray diffraction, field-emission scanning electron microscopy and X-ray photoelectron spectroscopy, respectively.The single phase of rutile-TiO2with dense mi- crostructure are obtained in all sintered (Ga0.5Nb0.5)xTi1-xO2ceramics. The existence of Ti3+ and oxygen vacancies are confirmed. The dielectric constant increased with increasing co-doping (Ga+Nb)concentration. Excellent dielectric properties are obtained in the (Ga0.5Nb0.5)xTi1-xO2ceramic with x= 0.1 sintered at 1550oC for 1h.Low dielectric loss tangent (< 0.05) and very large dielectric constant (e = 41267) with excellent temperature coefficient (<