DOCSLIB.ORG

Subnanosecond Pulsed-DC Ultra-High Gardient Photogun for Bright Relativistic Electron Bunches

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Subnanosecond Pulsed-DC Ultra-High Gardient Photogun for Bright Relativistic Electron Bunches Subnanosecond pulsed-DC ultra-high gardient photogun for bright relativistic electron bunches Citation for published version (APA): Vyuga, D. A. (2006). Subnanosecond pulsed-DC ultra-high gardient photogun for bright relativistic electron bunches. Technische Universiteit Eindhoven. https://doi.org/10.6100/IR612076 DOI: 10.6100/IR612076 Document status and date: Published: 01/01/2006 Document Version: Publisher’s PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication: • A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the “Taverne” license above, please follow below link for the End User Agreement: www.tue.nl/taverne Take down policy If you believe that this document breaches copyright please contact us at: [email protected] providing details and we will investigate your claim. Download date: 26. Sep. 2021 Subnanosecond Pulsed-DC ultra-high gradient photogun for bright relativistic electron bunches PROEFONTWERP ter verkrijging van de graad van doctor aan de Technische Universiteit Eindhoven, op gezag van de Rector Magnificus, prof.dr.ir. C.J. van Duijn, voor een commissie aangewezen door het College voor Promoties in het openbaar te verdedigen op donderdag 31 augustus 2006 om 16.00 uur door Dmitry Vyuga geboren te Sint-Petersburg, Rusland Dit proefontwerp is goedgekeurd door de promotoren: prof.dr. M.J. van der Wiel en prof.dr.ir. J.H. Blom Copromotor: dr.ir. G.J.H. Brussaard This research was financially supported by the Foundation for Fundamental Research on Matter FOM (PR55LWFA) CIP- DATA LIBRARY TECHNISCHE UNIVERSITEIT EINDHOVEN Vyuga, Dmitry Subnanosecond pulsed-DC ultra-high gradient photogun for bright relativistic electron bunches / by Dmitry Vyuga. – Eindhoven : Technische Universiteit Eindhoven, 2006. – Proefschrift. ISBN-10: 90-386-2072-1 ISBN-13: 978-90-386-2072-5 NUR 926 Trefwoorden: vrije-elektronenlasers / laserpulsen / elektronstralen / relativistische elektronen / deeltjesversnellers / hoogspanningsschakelaars / hoogspanningspulsen / foto-emissie Subject headings: pulsed power sources / electron accelerators / Tesla transformer / pulse forming line / vacuum diodes / spark gaps / photoinjectors / pulsed-DC acceleration / free electron lasers Copyright ©2006 D. Vyuga All rights reserved. No part of this book may be reproduced, stored in database or retrieval system, or published, in any form or in any way, electronically, mechanically, by print, microfilm or any other means without prior written permission of the author. Printed by Printservice Technische Universiteit Eindhoven, Eindhoven, The Netherlands Cover design by Dmitry Vyuga and Paul Verspaget Contents 1 Introduction…………………………………………………………………………….1 1.1 Introduction………………………………........................................................1 1.2 TU/e project…………………………………………………………………...3 1.3 Outline…………………………………………………………………………4 2 High voltage relativistic vacuum diode……………………………………………….8 2.1 Introduction……………………………………………………………………8 2.2 Space Charge Limited Current………………………………………………...9 2.2.1 Continuous Emission…………………………………………………...9 2.2.2 Pancake regime………………………………………………………..10 2.3 Emission in the presence of a strong electrical field…………………………12 2.4 Average and local field (field enhancement)………………………………...19 2.5 Vacuum breakdown………………………………………………………….21 2.6 Conclusions…………………………………………………………………..23 3 Sub-nanosecond high voltage techniques…………………………………………...26 3.1 Introduction…………………………………………………………………..26 3.2 Bandwidth considerations in a pulse forming line…………………………...26 3.3 Pulse sharpening. Commutation time of dischargers………………………...28 3.4 Pulse shortening. Different types of pulse forming systems…………………30 3.4.1 The short-circuited lines system………………………………………30 3.4.2 System with cut-off discharger………………………………………..31 3.4.3 Short storage line based system……………………………………….32 3.5 Vacuum diode for ultra-short pulses…………………………………………33 3.6 Tesla type resonant transformer……………………………………………...35 3.7 Sub-nanosecond high voltage pulse measurements………………………….39 4 TU/e pulser……………………………………………………………………………42 4.1 Introduction…………………………………………………………………..42 4.2 Pulse forming line……………………………………………………………44 4.3 The Tesla transformer………………………………………………………..48 4.4 TU/e Pulser…………………………………………………………………..52 5 Beam line setup……………………………………………………………….………54 5.1 Introduction…………………………………………………………………..54 5.2 The beam line general overview……………………………………………..54 5.3 Acceleration gap……………………………………………………………..56 5.4 Focusing magnet……………………………………………………………..56 5.5 Phosphor screen……………………………………………………………...59 5.6 Bunch charge measurements. Faraday cup…………………………………..60 5.7 Spectrometer…………………………………………………………………61 5.8 Linear photodiode array……………………………………………………...63 v 6 Synchronization………………………………………………………………………65 6.1 Introduction…………………………………………………………………..65 6.2 The laser system and timing sequence……………………………………….65 6.2.1 The lasers……………………………………………………………..65 6.2.2 Timing sequence……………………………………………………...66 6.3 Laser triggered spark gap operation………………………………………….68 6.3.1 Statistical method of breakdown consideration………………………69 6.3.2 Experimental results…………………………………………………..71 6.3.3 Analyses………………………………………………………………76 6.4 Conclusions and discussion………………………………………………….79 7 Commissioning………………………………………………………………………..81 7.1 Introduction ………………………………………………………………….81 7.2 The pulser operation…………………………………………………………81 7.2.1 Tesla transformer operation…………………………………………..81 7.2.2 The pulse forming line operation……………………………………..82 7.2.3 Reliability of the system……………………………………………...85 7.3 Optical high voltage pulse diagnostic in the pulse forming line……………..86 7.3.1 Kerr effect measurements in Carbogal……………………………….87 7.3.2 Optical voltage probe test…………………………………………….89 7.4 Electron emission measurements…………………………………………….91 7.4.1 Dark current measurements…………………………………………...92 7.4.2 Interpretation of the dark current measurements……………………...96 7.4.3 Photoemission measurements…………………………………………97 8 General discussion…………………………………………………………………..100 8.1 Introduction…………………………………………………………………100 8.2 Conclusions…………………………………………………………………100 8.3 Recommendation for further research……………………………………...102 8.3.1 Pulser………………………………………………………………..102 8.3.2 Electron bunch production…………………………………………..103 Summary 105 Sammenvatting 107 Acknowledgements 110 Curriculum Vitae 111 vi Chapter 1 1.1 Introduction Developments in science and technology require more and more accurate instruments for diagnostics, material research and technological applications. Electron beams are widely used for intense radiation production in the range from radiofrequency (RF) to gamma rays. Since the first experiments with conversion of electron energy to radiation have been made, electron beam based radiation sources play an important role in many applications. In many different applications the issues for such sources are: • Energy or wavelengths of the radiation quant. • Coherence of radiation. • Brilliance (Brightness). X-ray sources occupy a particular place in this field. Owing to the high penetrability and small wavelength, X-ray analysis allows us to obtain data which is inaccessible by other methods. The brightness of a source is a one of the most important requirements, since the exposure time needed for a measurement is inversely proportional to the intensity of the radiation. Since the 1970s the highest brightness is achieved with synchrotron radiation sources. These sources led to break through in many areas of research in solid state physics, chemistry, biology and medicine. Already the 3rd generation of synchrotron light sources is now in operation. These 3rd generation synchrotron sources can deliver peak brightness of up to 1026 (ph/s mrad2 mm2). But the science never stops and the required brightness keeps rising. The synchrotrons needed to generate this kind of light are more than a few hundred meters in circumference. For example the Swiss Light Source (SLS) which utilizes 2.4 GeV electrons has a circumference of 288 meters [1]. Spring8 (in Japan) which uses 8 GeV electrons has a circumference of 1 km [2]. Further improvement in brightness for synchrotron based light sources is also difficult because of fundamental reasons (electron beam brightness in a storage ring reaches fundamental limit). A likely candidate for
Load more

Recommended publications
  • ZEONICS SYSTECH.Cdr
    TM ZEONICS SYSTECH DEFENCE & AEROSPACE ENGINEERS (P) LTD. e of th ic e N rv a e t S io n n I ” “ 38 YEARS ESTABLISHED IN 1981 BANGALORE INDIA PRODUCT CATALOGUE “ADAR” No.3, 7th Cross, 10th Main, Maruthinagar, New Thippasandra Post, Bengaluru - 560075. Phone : +91-80-25241900, 25241901, 8050092601, 8050092602, 8050092603, 8050092604 Email : [email protected], [email protected] Website : www.zeonicssystech.com / www.systechcapacitors.com ZEONICS SYSTECH DEFENCE & AEROSPACE ENGINEERS (P) LTD. PRODUCT CATALOGUE Pioneers in Military Approved, Compact, Ultra Reliable High Voltage Components, Subassemblies and Systems IN SERVICE OF THE NATION SINCE 1981 “ADAR” No.3, 7th Cross, 10th Main, Maruthinagar, New Thippasandra Post, Bengaluru - 560075. Phone : +91-80-25241900, 25241901, 8050092601, 8050092602, 8050092603, 8050092604 Email : [email protected], [email protected] Website : www.zeonicssystech.com / www.systechcapacitors.com ZEONICS SYSTECH DEFENCE & AEROSPACE ENGINEERS (P) LTD. ABOUT US Zeonics Systech Defence & Aerospace Engineers Private Limited was established by Dr Z H Sholapurwala in the year of 1981 with the specific purpose of manufacturing High Voltage components and systems for the Government of India.We started as micro-scale unit mainly to design, develop and manufacture a wide variety of highly specialized equipment and components used for Defence, Atomic Energy and Strategic Applicaons. Our unit now has one of the most sophiscated R&D Labs in the country, with state of the art equipment and manufacturing facilies, cerfied by DSIR - Department of Scienfic and Industrial Research. The unit has now grown into macro-scale unit with the capability of handling all crical projects which are used for Radar, Missiles, Weapon systems and also food processing as well as medical technology.
    [Show full text]
  • Variable Capacitors in RF Circuits
    Source: Secrets of RF Circuit Design 1 CHAPTER Introduction to RF electronics Radio-frequency (RF) electronics differ from other electronics because the higher frequencies make some circuit operation a little hard to understand. Stray capacitance and stray inductance afflict these circuits. Stray capacitance is the capacitance that exists between conductors of the circuit, between conductors or components and ground, or between components. Stray inductance is the normal in- ductance of the conductors that connect components, as well as internal component inductances. These stray parameters are not usually important at dc and low ac frequencies, but as the frequency increases, they become a much larger proportion of the total. In some older very high frequency (VHF) TV tuners and VHF communi- cations receiver front ends, the stray capacitances were sufficiently large to tune the circuits, so no actual discrete tuning capacitors were needed. Also, skin effect exists at RF. The term skin effect refers to the fact that ac flows only on the outside portion of the conductor, while dc flows through the entire con- ductor. As frequency increases, skin effect produces a smaller zone of conduction and a correspondingly higher value of ac resistance compared with dc resistance. Another problem with RF circuits is that the signals find it easier to radiate both from the circuit and within the circuit. Thus, coupling effects between elements of the circuit, between the circuit and its environment, and from the environment to the circuit become a lot more critical at RF. Interference and other strange effects are found at RF that are missing in dc circuits and are negligible in most low- frequency ac circuits.
    [Show full text]
  • An95f AN95-1 Application Note 95
    Application Note 95 March 2004 Simple Circuitry for Cellular Telephone/Camera Flash Illumination A Practical Guide for Successfully Implementing Flashlamps Jim Williams and Albert Wu INTRODUCTION Next generation cellular telephones will include high qual- Their line source light output is hundreds of times greater ity photographic capability. Improved image sensors and than point source LEDs, resulting in dense, easily diffused optics are readily utilized, but high quality “Flash” illumi- light over a wide area. Additionally, the flashlamp color nation requires special attention. Flash lighting is crucial temperature of 5500°K to 6000°K, quite close to natural for obtaining good photographic performance and must light, eliminates the color correction necessitated by a be quite carefully considered. white LED’s blue peaked output. FLASH ILLUMINATION ALTERNATIVES FLASHLAMP BASICS Two practical choices exist for flash illumination—LEDs Figure 2 shows a conceptual flashlamp. The cylindrical (Light Emitting Diode) and flashlamps. Figure 1 compares glass envelope is filled with Xenon gas. Anode and cathode various performance categories for LED and flashlamp electrodes directly contact the gas; the trigger electrode, approaches. LEDs feature continuous operating capability distributed along the lamp’s outer surface, does not. Gas and low density support circuitry among other advan- breakdown potential is in the multikilovolt range; once tages. Flashlamps, however, have some particularly breakdown occurs, lamp impedance drops to ≤1Ω. High important characteristics for high quality photography. , LTC and LT are registered trademarks of Linear Technology Corporation. PERFORMANCE CATEGORY FLASHLAMP LED Light Output High—Typically 10 to 400× Higher Than LEDs. Line Source Low. Point Source Output Makes Even Light Distribution Output Makes Even Light Distribution Relatively Simple Somewhat Difficult Illumination vs Time Pulsed—Good for Sharp, Still Picture Continuous—Good for Video Color Temperature 5500°K to 6000°K—Very Close to Natural Light.
    [Show full text]
  • Ministry of Higher Education and Scientific Research University of Technology Laser and Optoelectronics Engineering Department
    Republic of Iraq Ministry of Higher Education and Scientific Research University of Technology Laser and Optoelectronics Engineering Department DESIGN AND IMPLEMENTATION OF MARX GENERATOR FOR LASER APPLICATIONS A Thesis Submitted to The Laser and Optoelectronics Engineering Department, University of Technology in Partial Fulfillment of the Requirements for the Degree of Master of Science in Laser Engineering By Eng. Sarmad Fawzi Hamza B. Sc. Electrical and Electronic Eng. / Laser Eng. 2003 Supervised by Dr. Naseer Mahdi Hadi Dr. Kadhim Abid Hubeatir February 2008 A. D. Safer 1429 A. H. جمھورية العراق وزارة التعليم العالي والبحث العلمي الجامعة التكنولوجية قسم ھندسة الليزر والبصريات اﻻلكترونية ﺘﺼﻤﻴﻡ ﻭﺒﻨﺎﺀ ﻤﺠﻬﺯﻤﺎﺭﻜﺱ ﻟﺘﻁﺒﻴﻘﺎﺕ ﺍﻟﻠﻴﺯﺭ رسالة مقدمة إلى قسـم ھندسـة الليـزر والبصـريات اﻻلكترونيـة الجامعة التكنـولوجيـة كجزء من متطلبات نيل درجة الماجستير علوم في ھندسة الليزر تقدم بھا المھندس سرمد فوزي حمزة الھندسة الكھربائية واﻷلكترونية / ھندسة الليزر2003 بإشراف د. نصير مھدي ھادي د. كاظم عبد حبيتر شباط 2008م صفر 1429ھ الخﻻصة إن منظومات الليزر الغازية ذات عرض نبضة خرج قصير. وقمة طاقة عالية تحتاج إلى نبضات تفريغ كھربائي بمواصفات خاصة مثل محاثة واطئة, معدل تكرارية للنبضة وزمن نھوض سريع . وان مجھز قدرة نوع ماركس واطئ المحاثة ممكن أن يوفر ھذا النوع من نبضات التفريغ لتشغيل الليزرات الغازية بكامل مواصفاتھا . تم تصميم وبناء وتشغيل نوعين من مجھز قدرة ماركس . اﻷول مجھز قدرة ماركس ذو ثمانية مراحل تضخيم يمكن أن يوفر فولتية خرج لغاية 64 كيلو فولت كحد أقصى . تم شحن فولتية أولية 2 كيلو فولت وحصلنا على فولتية خرج فعلية 12 كيلو فولت بنبضة ذات زمن نھوض 666 نانوثانية ومحاثة 11 مايكرو ھنري وكفاءته 75% , أما المجھز الثاني فكان مجھز قدرة ماركس ذو عشرة مراحل تضخيم ممكن أن يوفر400 كيلو فولت كحد أقصى , تم شحنه بفولتية أولية 4 كيلو فولت وحصلنا على فولتية خرج فعلية بحدود 38 كيلو فولت بنبضة ذات زمن نھوض 50 نانوثانية ومحاثة 4.2 مايكرو ھنري وكفاءته %95 .
    [Show full text]
  • Design of a Clc Testbed to Study High Voltage Capacitors
    DESIGN OF A CLC TESTBED TO STUDY HIGH VOLTAGE CAPACITORS by Christopher Francisco Martinez THESIS Submitted in partial fulfillment of the requirements For the degree Master of Science in Electrical Engineering at The University of Texas at Arlington December 14, 2019 Arlington, Texas Supervising Committee: Dr. David Wetz, Supervising Professor Dr. Gregory Turner Dr. Wei-Jen Lee Copyright by Christopher Francisco Martinez 2019 ACKNOWLEDGMENTS I would like to express my deepest appreciation to my advisor and committee chair Dr. David Wetz, without whom my success and completion of my Thesis would not have been possible. I would like to thank him for always guiding and pushing me to be the best I can be. I want to thank the rest of my committee members, Dr. Gregory Turner and Dr. Wei-Jen Lee for lending their valuable time to evaluate my work. I also want to thank Dr. Turner for lending a helping hand in the laboratory when I needed it. I’m extremely grateful to my family for the constant support. Especially, my mom and brother who’s love and encouragement are always with me. I would also like to thank my past lab mates, Dr. David Dodson, Dr. Brian McRee, Dr. Charles Nybeck, Dr. Jacob Sanchez for their mentorship and support when I needed it. I would also like to say thank you to Alex Johnston for his friendship and constant support during my time at the lab. Special thanks to the US Office of Naval Research (ONR) for their support of this work through grant N00014-17-1-2847.
    [Show full text]
  • Deep Dive Into Transformer Monitoring with PI
    Deep Dive into Transformer Monitoring with PI Vince Polsoni Alectra Utilities #OSIsoftUC #PIWorld ©2018 OSIsoft, LLC 1 Agenda • Alectra • Maintenance Methodology • Intelligent Transformer Maintenance • Innovation • Leveraging Integrated/ Interfaced Systems • PI AF, Notifications, Analysis, Reporting #OSIsoftUC #PIWorld ©2018 OSIsoft, LLC 2 Where is Alectra? 2nd Largest Municipally Owned Local Distribution Co. (LDC) in North America Ontario 1,068,587 km2 Alectra Service Territory • Located just North and West of Toronto, Ontario, Canada • 1800 km2 • 15 Communities • 1 million Customers • 3.1 million Population • 4750 MW Peak Demand • $3.6 Billion Total Assets #OSIsoftUC #PIWorld ©2018 OSIsoft, LLC 3 The Alectra Intelligent Maintenance Plan The Plan RCM3 (Reliability Centered Maintenance) TBM RCM3 CBM (Time Based Maintenance) (Condition Based Maintenance) 100% of work (PM) • Preventive, Predictive was time based • On Condition Task • Failure Finding • Scheduled Restoration RCM3 - ISO55000 Compliant 'Right Work at • Scheduled Discard RCM3 - ISO31000 Compliant the Right Time, • No Scheduled Maintenance Done the Right Way, The First time' #OSIsoftUC #PIWorld ©2018 OSIsoft, LLC 4 Intelligent Station Maintenance at Alectra • Leverage integration of PI System and CMMS • Risk Based - Condition Based Maintenance • RCM3 methodology incorporated in CMMS • Situational Awareness - Instant Information 24/7 • PI Notifications (Real time) • Alerts from CMMS System • PI System Reports, Dashboards • Automatic Triggered Maintenance Work Orders • Analytics in multiple systems • One source of data • Keeping it Simple #OSIsoftUC #PIWorld ©2018 OSIsoft, LLC 5 The Alectra Intelligent Maintenance System 2 Key Components 1. CASCADE CMMS • Tracks assets, Maintenance history, Asset Condition and Costs • Analytics • Trigger maintenance tasks based on condition or events • Interfaces with PI System, test equipment and Oil lab data • Prioritize maintenance work – Criticality, Health and Risk 2.
    [Show full text]
  • 1546 Strobotac Digital Stroboscope User and Service Manual
    ♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ♦ 1546 Strobotac Digital Stroboscope User and Service Manual Historical Note IET Labs continues to carry the torch lit by Harold Edgerton in the 1930’s by his designing and making practical stroboscopes with extremely short flashes at very high intensity. General Radio/GenRad de- veloped an extensive line of Strobotac Stroboscopes and accessories a over a 50 year period. The workhorse 1531 and 1538 models are still widely used, and IET Labs supplies and supports them. The basic 1542 is widely used in the printing industry. The Model 1539 Stroboslave is also built and supported. The Model 1546 is the most modern of the Stro- botacs. With its digital readout and sensitive trigger input, it will meet nearly every challenge that a user may impose. IET manufactures, calibrates and sup- ports all these models and others. IET Labs is proud to maintain the tradition of quality and excellence that is rooted in technological his- tory and now thrives in a new responsive environment. Copyright © 2001 IET Labs, Inc. 1546 im/June, 2002 IET LABS, INC. Standards • Decades • Strobes • Sound Level Meters • Bridges Formerly manufactured by 534 Main Street, Westbury, NY 11590 TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988 GenRad www.ietlabs.com WARRANTY We warrant that this product is free from defects in material and workmanship and, when properly used, will perform in accordance with applicable IET specifications. If within one year after original shipment, it is found not to meet this standard, it will be repaired or, at the option of IET, replaced at no charge when returned to IET.
    [Show full text]
  • FTS 430/830-4 Approach Lighting Systems Reference Manual Part Number 791430830
    FTS 430/830-4 Approach Lighting Systems Reference Manual Part Number 791430830 SERIAL NUMBER Flash Technology, 332 Nichol Mill Lane, Franklin, TN 37067 (615) 261-2000 Front Matter Abstract This manual describes the Installation, Maintenance, and Operation of the FTS 430 and FTS 830 Approach Lighting Systems manufactured by Flash Technology Corporation of America®. Copyright Copyright © 2016 Flash Technology Corporation of America, Franklin, TN, 37067, U.S.A. All rights reserved. Reproduction or use of any por- tion of this manual, without express written permission from Flash Technology Corporation of America and/or its licenser, is prohibited. Trademark Acknowledgments Flash Technology Corporation of America® is a registered trademark name. ™ ™ ™ ™ ™ ElectroFlash , Flash Tech , Flash Technology , FTCA , Flash , and the Flash Technology Logo are all trademarks of Flash Technology Corporation of America®. All trademarks and product names mentioned are properties of their respective companies, and are recognized and acknowledged as such by Flash Technology Corporation of America. Disclaimer While every effort has been made to ensure that the information in this manual is complete, accurate and up-to-date, Flash Technology Corpora- tion of America assumes no liability for damages resulting from any errors or omissions in this manual, or from the use of the information con- tained herein. Flash Technology Corporation of America reserves the right to revise this manual without obligation to notify any person or organization of the revision. In no event will Flash Technology Corporation of America be liable for direct, indirect, special, incidental, or consequential damages arising out of the use of or the inability to use this manual.
    [Show full text]
  • S252 S2n7 Is2 U.S
    United States Patent (19) 11 Patent Number: 5,072,347 Brunson 45 Date of Patent: Dec. 10, 1991 (54) SEARCH LIGHT 3,953,726 4/1976 Scarritt, Sr. ..... ... 362/286 4,121,136 10/1978 Fournier et al. ... 315/205 76 Inventor: Robert L. Brunson, 15860 Emma La., 4,240,009 12/1980 Paul ................. ... 315/224 Moreno Valley, Calif. 92370 4,317,162 2/1982 Richards et al. ... 362/06 4,450,508 5/1984 Carley ............. ... 362/105 (21) Appl. No.: 351,149 4,499,525 2/1985 Mallory ... ... 362/157 22 Filed: May 12, 1989 4,533,984 8/1985 Gatton ......... ... 362/232 4,634,936 1/1987 Gentry et al. ... 315/307 51) int. C. ................................................ F21L 7/00 4,729,077 3/1988 Gordin et al. ... 362/306 52 U.S. Cl. .................................... 362/194; 362/286; 4,782,432 1/1988 Coffman .......... - ... 362/184 362/187; 362/306; 362/261; 200/60 4,787,022 11/1988 Maeba et al. ......................... 363/52 58 Field of Search ............... 362/194, 187, 188, 285, 4,797,796 1/1989 Eastman, II et al. ... 362/286 362/286, 372,288, 306, 255, 261,263; 200/60 4,855,884 8/1989 Richardson ......................... 362/286 (56) References Cited Primary Examiner-Ira S. Lazarus Assistant Examiner-D. M. Cox U.S. PATENT DOCUMENTS Attorney, Agent, or Firm-Robert E. Brunson 1,286,590 12/918 Grether ............................... 362/188 (57) ABSTRACT 1,291,483 1/199 Grether .......... A. 1,369,892 3/1921 Hawthorne ... A hand held search light includes a miniaturized elec 1,825,354 9/93 Jones .............
    [Show full text]
  • Instrumentation Requirements for TREE Effects Data Collection at the Naval Postgraduate School Flash X-Ray Facility
    Calhoun: The NPS Institutional Archive Theses and Dissertations Thesis Collection 1990-06 Instrumentation requirements for TREE Effects Data Collection at the Naval Postgraduate School Flash X-ray facility Galarowicz, Dale Monterey, California: Naval Postgraduate School http://hdl.handle.net/10945/27744 NAVAL POSTGRADUATE SCHOOL Monterey, California iTIC AD-A237 681 J THESIS INSTRUMENTATION REQUIREMENTS FOR TREE EFFECTS DATA COLLECTION AT THE NAVAL POSTGRADUATE SCHOOL FLASH X-RAY FACILITY by Dale Galarowicz June 1990 Thesis Advisor X. K. Maruyama Approved for public release; distribution is unlimited. 91-03270 unclassified F SECURiTv CLASS F CA',0% O THIS PAGE Form Approved REPORT DOCUMENTATION PAGE OMBNo 0704-o188 la REPORT SECURITY CLASSIF CATION Ib RESTP:(TIVE MAR' NCS unclassified 2a SECURTY CLASSuICA' ON AUTHOR v 3 DISTR Bj-7ON AALAR: -- OF P;PCP Approved for public release; distribution 2b DECLASSIFICATION DOWNGRADING SCHEDJL unlimited 4 PERFORMING ORGANIZATION REPORT NUMBER(S) 5 MONITORING ORGAN:ZATON REPORT r. _%13, PS, 6a NAME OF PERFORMING ORGANIZATION 6b OFFICE SYMBOL 7a NAME OF MO"1'TOR I( OQCA% Z T 0% (If applicable) Naval Postgraduate School 32 Naval Postgraduate School 6c ADDRESS (City, State, and ZIP Code) 7n ADDRESS (City State and ZIP Code) Monterey, CA 93943-5000 Monterey, CA 93943-5000 T T 8a NAME OF FUND,NG SPONSOR NG 8b OFFICE SYMBO. 9 PPOCt) 'EN NS RPMEN .DENT FCA4TON NuMBEP ORGANIZATON (if applicable) 8c ADDRESS W.C,, a.i-i Z,P Loue) 10 SOACE OF N)%C. XC§> P ROGP4A' pp,- A VOP- UN ELEVENT %0 1 V-O CCESSION NO 11 TI .E (Include Security Classification) INSTRUMENTATION RDUIREMENTS FOR TREE EFFECTS DATA COLLECTION AT THE NAVAL POSTGRADUATE SCHOOL FLASH X-RAY FACILITY 12 PERSONA; A',THOP S, Dale Galarowicz0 13a TYPE OF PEPO .3b T'ME COjERED 4 DATE OF REPOR- (Year Month Da ) " PAC C .
    [Show full text]
  • Manipulation of Magnetic Nanoparticles with Rotating and Pulsed Magnetic Field
    Manipulation of magnetic nanoparticles with rotating and pulsed magnetic field by Laszlo Bodnar B.S., University of Szeged, 2014 M.S., University of Szeged, 2017 A THESIS submitted in partial fulfillment of the requirements for the degree MASTER OF SCIENCE Department of Chemistry College of Arts and Sciences KANSAS STATE UNIVERSITY Manhattan, Kansas 2019 Approved by: Major Professor Viktor Chikan Copyright © Laszlo Bodnar 2019. Abstract In the bioengineering field, magnetic nanoparticles are investigated for a variety of reasons. Magnetic nanoparticles in combination with magnetic fields are used as drug carriers, MRI contrast agents and therapeutic agents for cancer treatment. This research requires the cooperation of several research groups from different fields and therefore, a portable magnetic field generating device is often required. In the first part of this thesis the construction of a pulsed magnetic field generating device is described. The instrument is portable, easy to use and the commercial production of it is feasible. The device is based on two Bitter-type electromagnets driven by a resonant circuit. The bore of the coils can accept a test tube or adherent cell culture tube. The planned experiments involve drug release experiments performed on 5(6)-Carboxyfluorescein containing liposomes and cell viability assays using adherent cell cultures treated with an antibiotic drug and magnetic nanoparticles. To generate the magnetic pulse, a capacitor is discharged via a spark-gap switch, triggered by a high- voltage trigger spark generator. The device is controlled by a programmable logic controller (PLC) and an Arduino unit. The profile of the magnetic field generated by the coils was obtained by placing a high resolution magnetic viewing film into the coils.
    [Show full text]
  • ZEONICS SYSTECH.Cdr
    TM ZEONICS SYSTECH DEFENCE & AEROSPACE ENGINEERS (P) LTD. e of th ic e N rv a e t S io n n I ” “ 38 YEARS ESTABLISHED :- 1981 BANGALORE INDIA PRODUCT CATALOGUE “ADAR” No.3, 7th Cross, 10th Main, Maruthinagar, New Thippasandra Post, Bengaluru - 560075. Phone : +91-80-25241900, 25241901, 8050092601, 8050092602, 8050092603, 8050092604 Email : [email protected], [email protected] Website : www.zeonics.org / www.systechcapacitors.com ZEONICS SYSTECH DEFENCE & AEROSPACE ENGINEERS (P) LTD. PRODUCT CATALOUGE Pioneers in Military Approved, Compact, Ultra reliable, High voltage components, subassemblies & systems. IN SERVICE OF THE NATION SINCE 1981 “ADAR” No.3, 7th Cross, 10th Main, Maruthinagar, New Thippasandra Post, Bengaluru - 560075. Phone : +91-80-25241900, 25241901, 8050092601, 8050092602, 8050092603, 8050092604 Email : [email protected], [email protected] Website : www.zeonics.org / www.systechcapacitors.com ZEONICS SYSTECH DEFENCE & AEROSPACE ENGINEERS (P) LTD. Zeonics Systech Defence & Aerospace Engineers was established in the year 1981 with the specific purpose of manufacturing High Voltage Components & Systems. The unit was started as a Micro Scale Unit mainly to design develop & Manufacture a wide variety of Highly Specialized equipment & components used for Defence & Atomic Energy applicaons. The unit has one of the most sophiscated R & D labs in the country with state of the art equipment & manufacturing facilies. The unit has now grown into a Macro Scale unit with highly specialized & sophiscated Research & Development Laboratory, capable of handling crical projects. The unit manufactures systems for measurement and velocity of fast flying projecles. These systems are used in Military applicaons for measuring velocity of Rockets, Missiles, Bullets & other projecles. The unit manufactures Spark Gaps, Rail Gaps, Pulse Transformers, Trigger Transformers and a large variety of other HV Pulse Power Components.
    [Show full text]