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14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
1
Activities in ALICE
Daicui Zhou(for the Chinese Team)
• Brief Review on High Energy Heavy-Ion Physics in China • Activities in ALICE• Further Plan & Expectations • Summary
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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The Goals of High Energy Heavy-Ion
Collisions
• To search for a new form of matter - QGP (deconfinement and chiral symmetry restoration)
• To explore the phase diagram of QCD matter
• New physics at TeV energies, e.g. CGC, exotic particles, etc.
• To give indication to the origin and evolution of the universe
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
3
Brief Review on Chinese Participation in High Energy Heavy-Ion Experiments
• AGS/SPS/JINR programs (1986-2000): s=1.9GeV~17GeV
– EMU01(1986): 3 Institutes, (IHEP, SXNU, CCNU)
– E815(1986): 3 Institutes (IHEP, SXNU, CCNU)
– EMU12 (1991): 4 Inst., 20 people (IHEP, Hunan U., SXNU, CCNU)
– E863 (1990): (CCNU)
– NA49 (1996-1999) (CCNU)
• RHIC program (1999-) s=62.4GeV~200GeV
– PHENIX: 1 Institute, ~ 5 people (CIAE, PKU) – STAR: 6 Institutes, ~ 50 people (USTC, Tsinghua U,. SINR, IHEP, CCNU,
IMP Lanzhou) (MRPC-TOF detector)• LHC program (1993-) s=5.5TeV
– ALICE : 3 Institutes, ~ 30 people (CIAE, CCNU, HUST)
(Photon Spectrometer)• In addition, as individual there are many people worked or working on experiments such as:
– NA50, NA60, PHENIX, BRAHMS
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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Research Activities and Achievements
• 1999-2001 R&D PIN-Diodes (successfully passed the beam test) • 1999-2002 R&D PHOS Mechanics and production scheme
• 2002-2003 DAQ system for PHOS beam test • 2002-2004 R&D Preamplifier• 2004 PC Farm (26 nodes, 2.8GHz double CPUs,7TBytes)• 2002-2005 PHOS FEE (design, layout, manufacturing, testing in Wuhan and CERN for 12 FEEs )• 1995-2005 MC study on ALICE/PHOS (Punch-through Effect, PHOS PID, Trigger
Efficiency, 0 reconstruction, Di-muon invariant mass spectrum, etc.)
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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PIN-Diodes in China
R&D (CIAE)
17x17mm2 , high quantum efficiency, low current leakage
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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PropertyTarget
SpecificationTested result
Leakage current of chips (25°C) < 5nA 2-3nA
Quantum efficiency(in 400-500nm) 70-80% 80%
Diode capacitance(full depletion) < 150 pF 110-120pF
Operating Voltage < 100 V 50 V
Noise level (full depletion, -25°C) ~ 500 e ~ 430-540 e
PIN specification Comparison
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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FEE Requirements
• Large energy coverage : 100MeV-100GeV/c– High energy resolution at low energy region
• High precision APD bias voltage regulation• TOF resolution: 1ns• Trigger input to ALICE trigger system within 800 ns
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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PHOS FEE Configuration (1)
Other FECs
× N
Tri gger
TTCrx
DCS
PCI corePLX9054
FLASHEEPROM
DPRAM
CenterProcessor
SI U
PCI Bus
RORC
Tri gger
Shaper*8
PreampAPD
Other Shapers
FEC
FPGA
Dataand
Tri ggerProcessi ng
ADC
ControlLogi c
× M
ADC
GTL/ Fi el d Bus
RCUresource & pri ori ty manager
Aug.2002, Design in HUST & CCNU, Oslo
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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FEE scheme (2)
2002 , 11 , 17 - 22 ; 2003 - 2004
专家代表团参观了清华大学,在华中师大和华中科技大学详细讨论了 FEE 设计、确定研制方案、进行仿真、派人到 CERN研制
EVENT DATAALICE DDL (optical)
DAQ PC
DCSEthernet
CONTROL
ALICETriggerSystem
PHOS L0/L1
ALICE L0/L1/L2/TTC
Optical links, coax
PHOSpower+ bias400V, 12V, 6V, 3.3V
Cabling
PW
O c
rysta
ls
Counting room area
18-23/11,2002
CERN Delegation visited Tshinhua,CCNU and HUST,FEE meeting in Wuhan
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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Final Version of FEE by China - CERN
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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2004 Beam Test Results
(0)=4.7 MeV
(0)=8.4 MeV
20032004
+ 12C 0 + X 2 + X
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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PC-Farm in CCNU/IOPP
计算节点DELL
PE1750*13
计算节点DELL
PE1750*13
7TB (146*15, 320*15)
*2
*2
*1
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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DELL - 175026 nodes, Double CPU
DELL - 26502.8GHZ
Fiber: 15×146GBIDE:15x320GB
RAID Capacity : 7TB
PC-FARM in CCNU
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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Schedule for FEE Mass Production
• 2005:– Mass production of 130 FEEs for the first ALICE/PHOS
module before Oct. 2005– A test lab. for FEE and PHOS readout chain in 2005
• 2006:– Mass production and testing of FEEs for 2nd and 3rd PHOS
modules
• 2007:– Mass production and testing of FEEs for 4th and 5th PHOS
modules
In addition, Installation and Integration of ALICE detector has being carried out by China from 2003 to 2007.
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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Photon Sources in A+APhotons in A+A
Direct Photons Decay Photons
Non-thermal thermal Hard+thermal
Initial hardscattering
Pre-equili-brium photons
QGP Hadron gas
pQCD or prompt photons
Interaction of hard parton with QGP
1) and
2) Medium induced photon bremsstrahlung
gqq QGPhard qgq QGPhard
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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Research Program in Physics
Energy reconstruction and Particle identification
0 and spectra Direct photon studies Gamma-tagged jets
mix
amix
0?
0!
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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Contribution to ALICE and Pre-Term Research
• R&D PIN-Diodes 160 kCHF by NSFC • PC-FARM 190 kCHF by CCNU• ALICE Detector Installation & Integration (2003-2007, 5-7 technicians) 791 kCHF by Chinese Installation team• R&D FEE 80 kCHF by CCNU & HUST• Collaboration meeting 40 kCHF by NSFC, CMoE, CCNU, CIAE &HUST• Common Funds 15 kCHF by CCNU• FEE Test Platform 50 kCHF by CCNU &HUST
• Total spends 1326 kCHF
Research and development of the ALICE PHOS detector has been carried out successfully with the solid supports from the Chinese government and the three institutes and universities.
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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Expectations • MoU to be signed by the Chinese government
• Further financial support from MoST, NSFC, CMoE and individual institutes to the FEE mass production, data taking and analysis
• Important discoveries come out from the ALICE in the near future
Item Amounts (kCHF)
PHOS Front-end Electronics Cards 700
Test Equipments 100
Computing Grid (LCG) 200
Physics Analysis 200
Common Funds 180
M&O (By the end of 2007) 97
Total 1477 (~ 10M RMB)
14-16/05/2005 Beijing Workshop on China-CERN CooperationDaicui Zhou
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Summary• ALICE is physics frontier in next 10-15 years which is
expected to fully explore the properties of QCD matter• With the support from NSFC, CMoE and the three
institutes (CCNU, CIAE and HUST), Chinese ALICE team worked actively and productively on research and development of the ALICE/PHOS
• To achieve the physics goals as we supposed, further financial support from MoST, NSFC, CMoE and individual institutes are highly appreciated.
• We are looking forward to new discoveries in near future by the ALICE, which is the unique experiment dedicated to heavy ion physics at LHC.