alice status cern- korea meeting 23 april 2012
TRANSCRIPT
ALICE Status
CERN- Korea Meeting
23 April 2012
Korea in ALICE• Gangnung-Wonju National University
– TOF assembly & commissioning, Muon arm operation, physics
• Sejong
– Grid computing, physics
• Yonsei
– TRD assembly and commissioning, physics
• Pusan
– HMPID R&D and operation, physics
• KISTI (Full member)
– ALICE-Korea GRID computing center T1 & T2
More in the report by Pr. In-Kwon Yoo
KISTI
• KISTI: status changed from associate to full
member
– Main computing center in Korea and Asia
– Will become ALICE first Asian Tier1 with a substantial
resources contribution
– Has been approved as candidate Tier1 by WLCG (first
new Tier1 to be added since the start of WLCG)
– Will work on physics analysis thanks to targeted hiring
KISTI
• KISTI: status changed from associate (2010) to full
member
– Setup of the Tier1 test bed completed since 2010;
resources will be provided through WLCG next year
after WLCG certification
– Setup of the Tier2 test bed completed since 2007;
resources are delivered to ALICE since 2009 with a
98% availability
– Setup of the Analysis Facility (KIAF) completed
T2@KiSTI: 100 jobs average,250 max 120 cores and 50 TB allocated
AF@KiSTI: stable operation since 08/2010 96cores and 172TB allocated
Disk&CPU@KISTI5% of ALICE computing
T1@KiSTI: 200 jobs average,800 max 1000 cores and 1 PB allocated
Budget
• Core expenditure 2007-2009: 150 KCHF /
160 MCHF
• M&O-A 2013 (10/574): 89 KCHF / 5.0 MCHF
–M&O-A 2012 (10/575): 97 KCHF (after energy
rebate)
• M&O-B 2013 (TOF&MUON trigger): 29 KCHF
Other collaboration news• Institutes
– Tier1 at UNAM (Mexico) in preparation
– Tier2 in Cape Town and Tier1 in India being negotiated
– New member: COMSATS (Pakistan), SFTC Daresbury (UK), IIT (India),
SUT (Thailand), Talca (Chile)
• Nominations
– New CC member (L. Ramello)
– (Re) New EB members (P. Crochet, P. Braun-Munzinger, P. Jacobs, A.
Kisiel)
– New HMPID Project Leader: G. De Cataldo
– Run Coordinator (G. Scioli), Trigger Coordinator (K. Oyama)
Detector status
Detector status
• + 2 EMCAL SM• + 3 TRD SM• Capacitors from
TPC ROC removed
• SPD recovered with > 95% efficiency
• Muon TRK LV repair
• ZDCs shadowing removed
• 1500 visitors
ALICE operation
• 2011 : [email protected] TeV
Data taking performanceHigh-ratethroughput test
Data accumulation, peak rate up to 4GB/sec
Data replication: 300 MB/s; completed 4 days after the end of data taking
ALICE operation
• 2012
– 150 days of pp@8 TeV
• Baseline MB sample at a new energy
• Rare triggers: (di)-muon, jet, photon, hight
pT, high M
– 24 days of pA(Ap)@3.5 TeV
• Study of initial state effects
ALICE operation• Beyond 2013 (discussed at Chamonix
meeting, Feb 2012)
– 2015-2016: PbPb aiming for 250
μb-1/year
– 2017: pPb or PbPb to reach nominal 1
nb-1
– 2018: install ALICE upgrade during LS2
– 2019-20xx: PbPb, pPb, ArAr,…; goal 10
nb-1
Physics publications since last October• 8/32 papers submitted to journal (and arXiv):
– Heavy flavour decay muon production at forward rapidity in proton–proton
collisions at √s = 7 TeV; Phys. Lett. B 708 (2012) 265
– Underlying Event measurements in pp collisions at √s = 0.9 and 7 TeV with the
ALICE experiment at the LHC; arXiv:1112.2082
– Light vector meson production in pp collisions at √s = 7 TeV;
arXiv:1112.2222
– J/y Production as a function of charged particle multiplicity in pp collisions at √s
= 7 TeV; arXiv:1202.2816
– J/y Production at low transverse momentum in PbPb Collisions at √s_NN = 2.76
TeV; arXiv:1202.2816
– Suppression of high transverse momentum prompt D mesons in central Pb--Pb
collisions at √s_NN=2.76 TeV; arXiv:1203.2160
– Measurement of the Cross Section for Electromagnetic Dissociation with
Neutron Emission in Pb-Pb Collisions at √s_NN = 2.76 TeV; arXiv:1203.2436
– Inclusive J/psi production in pp collisions at √ s=2.76 TeV; arXiv:1203.3641
• 34 papers at various stages of collaboration review and
preparation
Improved physics performances
• Low mass di electrons: thermal radiation, Χ-sym
pp PbPb
Improved physics performances
• J/Ψ➝μμ: RAA, v2, charm thermalization
Improved physics performances
• D➝hadrons: RAA, v2, charm thermalization
Ds , 3M events in 20-40%
D0, 5M events in 0-7.5%
D*, 7M events in 30-50%
D+, 4M events in 0-7.5%
Selected physics results
J/ψ production in pp increases linearly with
the particle multiplicity
↓multi parton
interactions at hard scale in pp
Selected physics results
J/ψ interaction in the medium
↓Quarkonia melting in
the QGP + regeneration from thermalized charm
quarks
Selected physics results
Heavy Quarks interaction with the
medium ↓
Parton mass scaling ?
Upgrades
• Two documentsm, approved by the Collaboration, have
been submitted to LHCC
– ALICE at High Rate: motivation & strategy to operate ALICE
at high rates (L=6×1027cm-1s-1) after LS2
– CDR for the ITS upgrade
• Projects under discussion in the Collaboration
– VHMPID: new high momentum PID capabilities ← R&D Korea
– MFT: b-tagging, low pT ψ’, low mass di-muons
– FOCAL: low-x physics with identified γ/π0 ← R&D Korea
Upgrades• Beyond the ALICE approved physics
program
– Precision measurements of QGP
properties exploiting multi-differential
observables (g, q, Q, b, pT, RP, hID, …
– Focus on observables where ALICE is
unique (PID, low X0, precise vertexing
down to low pT, …)
Upgrades• Beyond the ALICE approved physics
program
– Precision measurements of QGP
properties exploiting multi-differential
observables (g, q, Q, b, pT, RP, hID, …
– Focus on observables where ALICE is
unique (PID, low X0, precise vertexing
down to low pT, …)
Upgrades
• Next Steps
– Preparation of ALICE upgrade Letter of Intend to
be presented to LHCC in June 2012
– Approval by the collaboration of additional
projects in September 2012
– Discussions with Funding Agencies (contribution
to identified projects, sharing of Common
Funds)
• ALICE had a great start and together with the pA run at
the end of this year is on the way to consolidate the
Standard Model of Heavy-Ion Physics…
• In the coming years and with the upgrade under
discussions ALICE is aiming for precision
measurements on the fundamental properties of the
QGP
• The sustained efforts of the Funding Agencies to
support this endeavor is essential