An overview of the Experimental High Energy Activities in Greece
Chara Petridou, Aristotle University of Thessaloniki, Greece [email protected]
The Activities An overview of the Experimental High Energy Activities in Greece
Greek Experimental HEP Activities Chara Petridou
Aristotle University of Thessaloniki Accelarator Non-Accelerator Detector/Acceleratotor Experiments Experiments R&D PhD's 44 PhD's 12 PhD's 3 PhD-students 30 PhD-students 4 PhD-students 2
Accelerator Physics Experiments Accelerator Physics Activities
CERN Fermilab Experiments DESY Experiments LHC Exper imen ts nTOF Tevatron-CDF Neutrino Physics HERA-H1/ZEUS PhD's 1 ATLAS CMS ALICE PhD's 1 PhD's 3 PhD-students 2 PhD's 18 PhD's 17 PhD's 3 PhD-students 1 PhD-students 1 PhD-students 10 PhD-students 10 PhD-students 5
Non-Accelerator Physics The Greek ATLAS Project Experiments NKUoA, NTUA, AUTh all three institutes collaborated for the construction of the BIS chambers of the ATLAS Muon sSpectrometer, consisting of 128 MTD Muon chambers Experiments in Greece Experiments at CERN All chambers installed in the ATLAS pit since Dec 2006
NESTOR HELYCON CAST PhD's 4 PhD's 3 PhD's 4 PhD-students 2 PhD-students 2 All chambers commissioned with cosmic rays Ready for data taking
C. Kourkoumelis This Conference
3 Demokritos University National Center for University The Greek ATLAS Project CMS in Greece of Athens Scientific Research of Ioannina Preshower • Muon studies: 2008: 17 PhD physicists Participation: Endcap • CMS Preshower (DEMOKRITOS-UoI) ECAL DCS and HV/LV, Bfield control for MTD’s, Muon Data Quality Assessment software, • Development HCAL Cosmic ray runs for the detector commissioning, • sensors (Si-strip-hybrids) Muon energy loss in calorimeters, Muon reconstruction performance • FE:development & test (UoI)
• Off -detector electronics (UoI) • Physics studies and interests: • Preshower DAQ (UoI) Preshower Higgs (SM H->4l, H/A ->2μ) μmodule • Assembly & test (total 4288) Exotics (Z’->μμ, W’->μν, Heavy quarkonia, Lepto-Quark ) • 1000 μmodules SM diboson production, search for anomalous couplings (DEMOKRITOS) • Simulation-calibration Preshower: One D (1/8) B physics (B cross-section, B+→J/Ψ K+ ) Preshower will be inserted in CMS during the LHC winter shutdown. • DQM (UοI) • Beam tests C. Kourkoumelis This Conference N. Manthos This Conference
CMS in Greece ALICE in Greece Participation(continue): •Trigger/DAQ (mainly DEMOKRITOS) • Development (GTPe) • Construction (IOP, GTPe) Input-Output Processor (IOP) Global Trigger Processor • Evaluation emulator (GTPe)
• CASTOR (UoA)
• Project management • Development-Simulations • Construction • Evaluation CASTOR: qqguartz / tungsten Cherenkov EM/HAD calorimeter, at the • Beam tests very forward rapidity region for forward QCD studies and unexplored cosmic ray phenomena. Half of the CASTOR is installed in the CMS line for the LHC • Physics analysis start up.
• CMS physics coordination (UoA) • Physics analysis of ECAL-Preshower test-beam data (DEMOKRITOS, UoI) • Physics analysis for the CMS Physics-TDR (DEMOKRITOS, UoA) TRD • Development of π0 rejection algorithms & electron efficiency (DEMOKRITOS) • Di-leptons + Jets + MET channel (UoA) • MSSM and little Higgs search (DEM.) • W and Z x-section,in the electron channel Zγ (ISR) and TGC (DEMOKRITOS)
• Future plans: Data Analysis, SLHC. N. Manthos This Conference
Hardware/Software Contributions of Hardware Contributions of the the NKUoA to ALICE NKUoA to ALICE
HVDS Description • Design, development and construction of the H.V. Distribution System (HVDS) for the TRD detector. Î A Master/Slave power supply distribution system has been designed • Design and development of a monitoring system (Gate Pulser) and constructed in order to provide the for the ALICE TPC. required anode (1.9kV) and drift voltage (-2.5kV) to the ALICE TRD • Development of the DAQ monitoring system for the Forward readout chambers. detectors of ALICE -used by all ALICE detectors. • Comprises Software upgrade for online monitoring (MOOD) Î The system can switch on and off, monitor (at the nA level), protect, • Software development for Data Flow Control for all ALICE and regulate (leverage of 1000 Volts) detectors (AMORE) each channel from a common ceiling voltage.
XXVI Workshop on Recent Developments in HEP M. Vassiliou
4 Hardware Contributions of the NKUoA to ALICE Contributions to Physics Analysis Software of the NKUoA in ALICE HVDS Specifications Both Systems: Output Channels 180 ramp-up rate 1-30 V/s • Contributions to the ALICE Physics Performance ramp-down rate 1-100 V/s Reports ( I + II) HV stability <0.1% /24h Achieved HV stability ~0. 002%/24h Ripple rejection ~40 dB • Physics preparation Studies with Monte Carlo Current accuracy <0.2% simulations: Achieved Current accuracy ~0.03% – Topological K/π identification, response time < 50 ms –
n_TOF – Phase 2 Contributions to Physics Analysis 2008 and beyond Software of the NKUoA to ALICE
K/π separation from their decays in the TRD detector
Accelerator Experiments:FermiLab Greek Contribution to nTOF Tevatron-CDF
• Participation: University of • Aristotle University of Thessaloniki Athens •NTUA – Activity: • UiUnivers ity of Ioanni na • Top mass measurement
•NRCPS Demokritos Use PT of lepton to estimate mass
• Measurements relevant to fundamental physics, •W->eν cross-section – Nuclear Astrophysics, measurement • Nuclear fuel cycles and incineration of nuclear waste Use forward electrons
5 Greece in CDF Greece in CDF
•Lepton Pspectrum sensitive to T • Forward electron P spectrum the top mass T – Measured cross-section – Use maximum likelihood method to fit data with signal + SM background for different top mass values – Compared to cross-section from central region • Method can be applied to LHC data – Theoretical prediction : 2720±130pb
A. Staveris PhD Thesis V.Giakoumakopoulou PhD Thesis
University of Athens Neutrino Group (NKUoA) Beam: NuMI beam, 120 GeV Protons → νμ-beam( High Intensity)
Activities: Detectors: ND, FD Near Det: 980 ton version of FD, at FNAL (L ≈ • DONuT Experiment (Completed) 1 km): Measure beam composition and energy spectrum
MINOS Experiment: Far Detector PMT Testing and Characterization; Near Far Det: 5.4 kton magnetized Fe/Sci Tracker/Calorimeter at Soudan, MN (L=735 detector commissioning; CC Data Analysis. km): Search for evidence of oscillations
MINERvA Experiment (In construction phase); PMT Testing and Characterization; Design of the Test stand; Software development
NOvA Experiment (In construction)
Construction of a PET prototype Best Fit: |Δm2| = 2.43x10-3 eV2 sin2(2θ) =1.00
N. Saoulidou: DONuT (PhD), MINOS World's Best ∆m 2 C. Andreopoulos: DONuT, MINOS (PhD) measurement
FAR MINOS DETECTOR 5.4 kton Magnetized Scintillator Calorimeter/Muon WLS Fiber Spectrometer Scintillator Module
Structure: Steel / Scintillator • 2.5 cm thick steel Scint • 4 cm x 1 cm polystyrene strips in Al cover Strip • WLS fiber • 8m x 8m Octagonal Planes WLS Fibers
• 8 modules/plane, 192 strips/plane • 15.2 k A-turn coil WLS Fibers
• Cosmic Ray Shield Total: 486 Layers Æ 5.4 kTon Far Detector: le (2-6m) ble (2-6 m) (2-6 ble
Hamamatsu b a • Electronics: Viking chip (VA) based M16 MAPMT 8 m VA Chip Optical Conn. Optical Connector NEAR MINOS DETECTOR based Emulates the Far detector in absorber, active planes, and Bfield. Structure: Near Detector: Optical Connector Veto section Optical Connector Target section Hamamatsu Shower detector M64 MAPMT Clear Fiber Ribbon C Ribbon Fiber Clear Muon spectrometer Multiplex Multiplex Clear Ca Ribbon Fiber QIE Chip to Connection electronics 282 steel planes Box to Connection electronics Box 153 scint. Planes based 1 kT, 3.8 m x 4.8 m “squeezed” octagon PMTs Electronics: QIE chip based
6 NKUoA in MINOS Greece in HERA/H1 • WHAT TO TEST • Gain determination (dependence on HV) Constructed an Automated Test Station • Compute Nominal HV ( Gain for Hamamatsu M16 = 1x106) • Dark count spectra and dark • Performs a wide range of precise measurements count rate • Tests 10 PMTs simultaneously • Verify good SPE separation • Fully automatic • Cross-talk • runs a sequence of data-taking modes • Uniformity • without ‘human’ intervention for ~ 3 days • at 500 Hz DAQ rate Þ ~ 2 GBs/batch (not raw Linearity • data) • Long term stability Total number of tested PMTs for MINOS FAR DETECTOR: 750
Inside the dark room PMTs LQ Exclusion Limits – Comparison with LEP & Tevatron Optical MUX HERA extends the exclusion region Electronics rack Optical MUX control room I. Panagoulias DIS2008 – work on PhD / NTUA & H1/HERA
The Nestor Project in Greece The Nestor Project in Greece
NESTOR neutrino telescope sketch. Pictorial representation of a muon track (blue line). Several floors are shown •Pink lines represent Cherenkov NESTOR INSTITUTE photons hitting the photomultipliers.
•Tracks coming from below could be attributed to neutrino PYLOS COUNTING STATION
NESTOR PROTOTYPE DEPLOYMENT SITE
PORTO-LAGOS Electro-optical cable Length: 30km, 18 optical fibres, conductor (6kW)
NESTOR BASIN The tower 4000m depth The NESTOR prototype moments after deployment S. Anasontzis This Conference
HELYCONHELYCON HELYCON: Detector Construction Hellenic Lyceum Cosmic Observatories Network HV Generator: EMCO CA20N
LED
PH: XP1912 Temperature Sensor
• Obtain direction of showers from time differences between stations • Correlations between showers • Flux of showers 9 Synchronization between stations achieved through GPS
7 HELYCON: Testing and Shower Reconstruction HELYCONHELYCON: Detector Deployment Single Station equipped : • 4 scintl.counters • GPS synchr. system • PC based DAQ syst.
Zenith angle distribution of reconstructed atmospheric showers A1 B2 A3 (data points) with Monte Carlo (CORSICA, solid Patras Chios Nicosia Thessalonica line) predictions using: a) the detectors A1, A2, 2007-2008 2008-2009 2007-2008 2008-2009 2007-2008 2008-2009 2007-2008 2008-2009 B1 A2 B3 A3, B1, B2, B3, b) the 4 stations 4+6 4 stations 1 1 counters A1, A2, A3 and c) stations station station using the counters B1, B2, B3
5m CAST in Greece HELYCON : KMKM33 Neutrino Telescope angular calibration and absolute position 19m • Search for axions from the sun, detected via their coupling to the magnetic field • Use the prototype dipole axion source axion detection 19m LHC magnet three platforms, with 16 HELYCON detectors each, operating for 10 days, offer a 0.05o calibration resolution in zenith angle and less than 0.8m error in estimating the absolute position of μ track the neutrino telescope α KM3NeT:Conseptual Design for a Deep‐Sea Re search Infrastructure Incorporating a Very Lar γval γ ge Volume Neutrino Telescope X Study of the calibration potential of HELYCON B detectors with ANTARES Jean‐Pierre Ernenwein , Apostolos Tsirigotis Spyros km3 Tzamarias, VLNT 2008, to be appear in NIM
CAST in Greece Micromegas for SLHC • Participating Institutes: 9 University of Patras A project to investigate the feasibility and 9 NRCPS Democritos determine the working parameters of Micromegas 9 Aristotle University of Thessaloniki for SLHC tracking 9 National Technical University of Athens In conjunction with the ATLAS SLHC Micromegas • Major Contributions to the Experiment: chbhambers eff ort 9 Strong Greek involvement in the proposal and the creation Participating Institutions of the Collaboration Saclay 9 Contribution to development, construction and installation of Micromegas detectors Demokritos 9 Monte Carlo simulations and data Analysis Univ. of Athens 9 Software development for the He-3 system controls Univ. of Thessaloniki Technical Univ. of Athens
8 The Telescope The Test beam prototype
Cu+Kapton window o’ring
cover frame (alu) pillars (gap 128 microns) drift pillars drift mesh XY XY XY resistive foil anode (pitch 2mm:48 strips Detector parameters screws (M4) PCB guard frame or pitch:1mm,96 strips) metal frame PCB: thickness 3.2mm •Design and construct 6 (()X,Y) detectors to form a beam telescope (alu) 9 microns Cu+Ni/Au ground (Cu) • Design and construct several test detectors with different pitches (0.5, 1 and 2 mm) some with resistive layers 2 H.T connections (SHV) (mesh+drift) • Use GASSIPLEX electronics and later a faster front-end system Connectors for gassiplex cards glue
• Design Labview DAQ and later a faster system holes (fixation) Measurements • assessment of protection against sparks Gas IN Gas OUT • improvement of spatial resolution Strips (through PCB) • Gas mixture studies TWEPP08 Chara Petridou TWEPP08 Chara Petridou Sep-15-08 1 Sep-15-08 2
Status LHC Grid Computing The WLCG Project in Greece • X and Y Micromegas chamber design • Six Grid clusters of the Hellas Grid finished are currently running in Greece • 2 prototypes constructed • 8 more chambers under construction • Approximate 1000 64-bit CPU units and 100 TBytes online • Labview DAQ and Monitoring under storage, connected over an end- development to-end Gigabit backbone • Planning for initial tests in October 08 • The HellasGrid infrastructure is fully integrated within the pan- european Grid infrastructure EGEE
• No MoU yet signed with the WLCG
TWEPP08 Chara Petridou TWEPP08 Chara Petridou Sep-15-08 3 Sep-15-08 4
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