14-16/05/2005 beijing workshop on china-cern cooperation daicui zhou 1 activities in alice daicui...

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


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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


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


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Activities in ALICE


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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.)


6

PIN-Diodes in China

R&D (CIAE)

17x17mm2 , high quantum efficiency, low current leakage


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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


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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


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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


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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


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Final Version of FEE by China － CERN


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China － CERN design


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Shaper in FEE


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FEE Production in China


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FEE Production in China


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FEE Test at CERN


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FEE Test Results


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2004 Beam Test Results

(0)=4.7 MeV

(0)=8.4 MeV

20032004

+ 12C 0 + X 2 + X


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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


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DELL － 175026 nodes, Double CPU

DELL － 26502.8GHZ

Fiber: 15×146GBIDE:15x320GB

RAID Capacity ： 7TB

PC-FARM in CCNU


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Further Plan & Expectations


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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.


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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


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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!


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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.


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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)


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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.


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Thanks !

14-16/05/2005 beijing workshop on china-cern cooperation daicui zhou 1 activities in alice daicui...

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