Chinorat Kobdaj SPC 2012 11 May 2012. What is heavy ion physics? What is ALICE?
ALICE & heavy ion physics
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Transcript of ALICE & heavy ion physics
ALICE & heavy ion physicsMichal Šumbera
Nuclear Physics Institute AS CR, Řež
7.4.200 Michal Šumbera RECFA- Prague 2000
PHASE DIAGRAM OF QCD MATTER PHASE DIAGRAM OF QCD MATTER
7.4.200 Michal Šumbera RECFA- Prague 2000
SPS lead beam experimentsSPS lead beam experiments
Study of strange and multi-strange baryon production in lead-lead collisions
High statistics study of photons, neutral hadrons and charged particles, and
their correlations in Pb-Pb collisions.
Study of electron-pair production at high energy heavy ion collisions.
7.4.200 Michal Šumbera RECFA- Prague 2000
WA97/NA57WA97/NA57
• Institute: * Institute of Physics, Prague
• People: P.Závada, P.Staroba, J.Weichert,
J.Böhm, K.Píška• Activities:
Maintenance and operation of the beam trigger counters
Event reconstruction using data from pixel telescope
HBT interferometry Phenomenological analysis of multi-strange
baryon production
7.4.200 Michal Šumbera RECFA- Prague 2000
WA97/NA57WA97/NA57
7.4.200 Michal Šumbera RECFA- Prague 2000
7.4.200 Michal Šumbera RECFA- Prague 2000
Enhanced production of multi-strange baryons:Signature of QGP
Enhanced production of multi-strange baryons:Signature of QGP
7.4.200 Michal Šumbera RECFA- Prague 2000
WA98WA98
• Institute:
* Nuclear Physics Institute, Řež
• People: M.Šumbera, S.Eliseev,V. Petráček,
I. Hřivnáčová, A. Kugler, M. Pachr,J. Rak
• Activities: Maintenance and operation Silicon Drift
Detector Data analysis Search for Disorientd Chiral Condensates Study of multiparticle correlations
7.4.200 Michal Šumbera RECFA- Prague 2000
7.4.200 Michal Šumbera RECFA- Prague 2000
M.M. Aggarwal et al.
Phys. Rev. Lett. 83(1999)926
M.M. Aggarwal et al.
Phys. Rev. Lett. 83(1999)926
7.4.200 Michal Šumbera RECFA- Prague 2000
Direct photon resultDirect photon result
Preliminary
Preliminary
7.4.200 Michal Šumbera RECFA- Prague 2000
CERES/NA45CERES/NA45
• Institute:
* Nuclear Physics Institute, Řež (since 1997)
• People: M.Šumbera, V.Kouchpil,V. Petráček, J.Rak, D.Adamová, V.Hanzal,
I.Hřivnáčová
• Activities: Maintenance and operation of doublet of
Silicon Drift Detectors Data analysis Search for open charm production High pT particle production
7.4.200 Michal Šumbera RECFA- Prague 2000
7.4.200 Michal Šumbera RECFA- Prague 2000
7.4.200 Michal Šumbera RECFA- Prague 2000
WA98 & NA45/CERES: Radial Silicon Drift Detectors
WA98 & NA45/CERES: Radial Silicon Drift Detectors
7.4.200 Michal Šumbera RECFA- Prague 2000
7.4.200 Michal Šumbera RECFA- Prague 2000
7.4.200 Michal Šumbera RECFA- Prague 2000
Enhanced production of low pT e+e- pairs:Signatureof chiral symmetry restoration
Enhanced production of low pT e+e- pairs:Signatureof chiral symmetry restoration
Michal Šumbera RECFA- Prague 20007.4.200
A Large Ion Collider Experiment
Michal Šumbera RECFA- Prague 20007.4.200
7.4.200 Michal Šumbera RECFA- Prague 2000
ALICE in the Czech Republic
ALICE in the Czech Republic
• Institutes:
* Institute of Physics, Prague
* Nuclear Physic Institute, Řež• People (19): D. Adamová, J.Hošek, V.Hanzal, I.Hřivnáčová,
S.Kouchpil,V.Kouchpil, A.Kugler, J.A.Mareš, E.Mihóková, J.Nikl, V.Petráček, K. Píška, K.Polák, M.Šumbera, P.Tlustý, V.Wagner, P.Závada,D.Zákoucký, I. Zborovský
• Activities: Silicon Drift Detectors Low Voltage Supply for Silicon Drift Detectors Scintillation Detectors Physics Off-line
Michal Šumbera RECFA- Prague 20007.4.200
ALICE Inner Tracking SystemALICE Inner Tracking System
Michal Šumbera RECFA- Prague 20007.4.200
View of ITS space frame and SDD laddersView of ITS space frame and SDD ladders
2 layers of Silicon Strip Detectors2 layers of Silicon Drift Detectors 2 layers of Silicon Pixel Detectors
2 layers of Silicon Strip Detectors2 layers of Silicon Drift Detectors 2 layers of Silicon Pixel Detectors
7.4.200 Michal Šumbera RECFA- Prague 2000
Large area linear Si-drift detector prototypefor ALICE experiment
Large area linear Si-drift detector prototypefor ALICE experiment
• Designed in 1996 by Vojtěch Petráček (NPI Řež) and Pavel Rehak (BNL).
• Innovation w.r.t. previous ALICE prototypes: hexagonal geometry with rectangular active region allowing very simple alignment of detectors on the ladder.
• Mask and detector fabrication @ ASICentrum Prague, ICM Prague and TESLA SEZAM Rožnov pod Radhoštěm.
7.4.200 Michal Šumbera RECFA- Prague 2000
Basic detector characteristicsBasic detector characteristics
• Rectangular active region 50 x 67 m• 9% of dead region (guard structures)
• Implanted P+ resistor HV divider • 200 anodes on each side of the detector (anode pitch
250 m)• 3 lines of MOS , N+ and N+(AC) charge injection
structures
• Precise openings in metalization for laser-induced charge injection
• Anode structures around the guard zone allows to study leakage currents in this region
• Detector is fabricated on 3.5 kOhm/cm NTD N Si
7.4.200 Michal Šumbera RECFA- Prague 2000
7.4.200 Michal Šumbera RECFA- Prague 2000
Laboratory and beam test of ALICE SDD prototypes
Laboratory and beam test of ALICE SDD prototypes
7.4.200 Michal Šumbera RECFA- Prague 2000
Vojtěch Petráček
Dalibor ZákouckýPavel Tlustý
7.4.200 Michal Šumbera RECFA- Prague 2000
Beam test of 4” Linear Silicon Drift Detector prototypes
Beam test of 4” Linear Silicon Drift Detector prototypes
V. Petráček et al.
ALICE INT 99-26
V. Petráček et al.
ALICE INT 99-26
7.4.200 Michal Šumbera RECFA- Prague 2000
Beam test of 4” Linear Silicon Drift Detector prototypes
Beam test of 4” Linear Silicon Drift Detector prototypes
V. Petráček et al.
ALICE INT 99-26
V. Petráček et al.
ALICE INT 99-26
7.4.200 Michal Šumbera RECFA- Prague 2000
LV power supply for the ITS/SDD - scheme of the ladder part
LV power supply for the ITS/SDD - scheme of the ladder part
V.Petráček:
ALICE ITS TDR
CERN/LHCC 99-12
V.Petráček:
ALICE ITS TDR
CERN/LHCC 99-12
7.4.200 Michal Šumbera RECFA- Prague 2000
LV power supply for SDD layer of ITSLV power supply for SDD layer of ITSV.Petráček:
ALICE ITS TDR
CERN/LHCC 99-12
V.Petráček:
ALICE ITS TDR
CERN/LHCC 99-12
Michal Šumbera RECFA- Prague 20007.4.200
LVPS module prototype(AREM PRO, Praha)
LVPS module prototype(AREM PRO, Praha)
Michal Šumbera RECFA- Prague 20007.4.200
ALICE Photon Spectrometer PHOS
ALICE Photon Spectrometer PHOS
• 17 280 PWO crystals
• 2.2x2.2x18 cm3
• coupled to large-area PIN-diodes with low-noise preamps
PHOS
7.4.200 Michal Šumbera RECFA- Prague 2000
Scintillation group, Dept. of Optical Crystal, Institute of Physics, Prague
Scintillation group, Dept. of Optical Crystal, Institute of Physics, Prague
• 1995-7: Development and production (in co-operation with Preciosa Crytur Co.) of large PWO blocks (2x2x0cm) which were used in the ALICE beam tests.
• 1997-2000: Continuation of beam tests. Testing of absorption properties and scintillation characteri-stics of selected PWO crystals, including detailed studies of various doped crystals.
• 2000-2005: Participation in tests, assembly and measurement of characteristics of individual crystals
7.4.200 Michal Šumbera RECFA- Prague 2000
Transmission spectra at room temperature for three different PWO crystals (L = 18 cm)
Transmission spectra at room temperature for three different PWO crystals (L = 18 cm)
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PWO 176 crystal
PWO 291 crystal
PWO 340 crystal
Wavelength [nm]
Transmission of three different PWO crystals measured through them (according to their longest side)