alice analysis status@tsukuba ~practice on grid/caf~
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ALICE Analysis Status@Tsukuba ~Practice on GRID/CAF~. Univ. of Tsukuba & JSPS T. Horaguchi Jan. 21 2010 for the ALICE Analysis Workshop. Outline. Status @ Tsukuba Group Analysis Facility @ Tsukuba Network @ Tsukuba Tsukuba Cluster Analysis Status & Plan Single & Di-Jet - PowerPoint PPT PresentationTRANSCRIPT
ALICE ANALYSIS STATUS@TSUKUBA
~PRACTICE ON GRID/CAF~
Univ. of Tsukuba & JSPST. Horaguchi
Jan. 21 2010 for the ALICE Analysis Workshop
2010/1/21ALICE Analysis Workshop @ Hirosima Univ. 1
OUTLINE Status @ Tsukuba Group Analysis Facility @ Tsukuba
Network @ TsukubaTsukuba Cluster
Analysis Status & PlanSingle & Di-Jet Photon (pi0 & Direct photon via internal
conv.)Soft Physics (Mean pT & Accumulative Corr.)
Summary & Future Plan2010/1/21ALICE Analysis Workshop @ Hirosima Univ. 2
STATUS @ TSUKUBA Contribution to ALICE
ALICE Detector Di-Jet Calorimeter
Construction Simulation Calibration Physics Analysis
TRD DCS Work
EMCAL HLT, Calibration
ALICE Analysis Direct Photon via Internal Conversion Measurement Single & Di-Jet Measurement Mean pT, Accumulative Correlation Event Display with AliEVE
So, we needed more machine power locally, but we succeeded to establish our computing facility ! (See next slides)
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ANALYSIS FACILITY @TSUKUBA
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NETWORK @ TSUKUBA GROUP Tsukuba Cluster
Established Local Cluster in early April in last year Established private network, gave private IP address instead of global IP
Hep-net (See Next Slide) One GateWay in global has the private PCs and Worker Nodes in private
IP space for security reason Plan for Data Transfer
Several hundreds GByte will be transferred with starting LHC-ALICE How many times we have a meeting with abroad in months ?
About 5 or 6 times Security for our Network
All private PCs and Worker Nodes are in private, except GateWay Restricted password access to Gateway, adopted public key access for
security reason Only the access from major Institutes and member’s home are
permitted access to GataWay using ssh VPN will be adopted our network near the future
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NETWORK @ TSUKUBA GROUP Private Network
Local Cluster(16 nodes) Private PC(~ 15nodes)
Local Cluster PHENIX / ALICE CPU (144core)
Xeon E5345 2.33GHz 7node x 2cpu x 4core Memory / core ~ 1GByte
Xeon E5310 1.60 GHz 7node x 2cpu x 4core Memory / core ~ 1GByte
Xeon E5540 2.53 GHz 2node x 2cpu x 8core Memory / core ~ 1.5GByte
Storage Server RAID :12TByte Local : ~8TByte Total : ~ 20TByte
OS Scientific Linux 4.5 & 5.3 All WN will be updated to SLC5
Batch Job System Condor
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WN
PC
PC
PC
Hep-net
Local Cluster
Private Networ
k
Condo
r Serve
r Disk Serve
r
GateWay
Local
Disk
Local
Disk
ALICE SIMULATION & DATA ANALYSIS ALICE Data Analysis
AliRoot Installation V4-16-Rev-03 V4-17-01 V4-17-Rev-20 (for pass1) V4-17-Rev-22 (for pass1) V4-17-Rev-23 (for pass2 only Calorimeter) V4-17-Rev-24 (for pass2)
ALICE Data First Year pass1 data (all root_archive) First Year pass2 data (Calorimeter only) First Year pass2 data (ESD only)
Physics Simulation & Analysis Simulation for Di-Jet Calorimeter in event generator level
PYTHIA PQUEAN QPYTIHA (1sec / event) HIJING
Simulation for Di-Jet Calorimeter in GEANT level Waiting for Wuhan’s contribution
Data Transfer with AliEn 0.2 MByte / sec with gridftp
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MANAGEMENT FOR CLUSTER 1 Staff & 5 Students are
workingStaff
T. HoraguchiStudent
K. Watanabe D. Sakata M. Sano H. Yokoyama Y. Watanabe
5 students are expert & super heavy user of our cluster !
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ANALYSIS STATUS & PLAN
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DI-JET CALORIMETER Member
Y. Miake S. Esumi T. Chujo M. Inaba M. Shimomura T. Horaguchi M. Sano D. Sakata H. Yokoyama S. Kubota Y. Kondo Y. Watanabe
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Recoil Di-jet ETjet1>70GeV
Recoil 0-jet ET
0>30GeV Recoil -jet ET
>30GeV
in PHOS/J-cal
EM-cal
jet (R<0.3) in J-cal
EM-cal
0 inPHOS/J-cal
EM-cal
M. Sano, H. Yokoyama,Grad. Student of Tsukuba
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Improvement in jet energy resolution !
M. Sano, H. Yokoyama,Grad. Student of Tsukuba
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JET ANALYSIS @ TSUKUBA Member
T. Horaguchi D. Sakata
Joined Jet Working Group in PWG4
Presentation 2 times @ PWG4
Using Tsukuba Cluster Focused to study Jet
Finding Algorithm now, but we also has started the analysis of pp 900GeV data !
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JET FINDING ALGORITHM
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FastJet: sequential clustering algorithmshttp://www.lpthe.jussieu.fr/~salam/fastjet kT algorithm
Cambridge/Aachen algorithmanti-kT algorithm
Cone jetKT jet
dij min(kti2p ,ktj
2p ) R2
R2
p1p0p 1
Parameters - R size - pT cut - Jet threshold
arXiv:0802.1189v2 [hep-pn] (2008)
Algorithm
2010/1/21ALICE Analysis Workshop @ Hirosima Univ.
Calculate particle distance : dij
Calculate Beam distance : diB=kti2p
Find the smallest distance (dij or diB) If dij is the smallest combine particles If diB is the smallest and the cluster
momentum lager than threshold call the cluster a Jet.
WHICH IS THE BEST ALGORITHM ?
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Δϕ resolution Δη resolution measured energy
pThard 100GeV/cJet threshold 20GeV/c
kT algorithm
anti-kT algorithm
Cambridge algorithm
Resolution : σ of sharp gaussian Performance of energy reconstruction of Jet with anti-kT algorithm is about 50% better than kT algorithm!
We analyze for closest Jet to partonΔφ , Δη= parton axis – jet axisThis work has been done by D. Sakata & T. Horaguchi.
2010/1/21ALICE Analysis Workshop @ Hirosima Univ.
SOFT PHYSICS @ TSUKUBA (1)
Member K. Watanabe T. Horaguchi
Presentation PWG2(2010 Jan. 12)
Physics Motivation Study of soft & hard physics
in pp collisions Mean pT Accumulative Correlation
Using Tsukuba Cluster, but just preparing to join the PWG2 Train now.
PWG2’s suggested to us, we had better to join First Physics group for study of mean pT & Multiplicity…
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SOFT PHYSICS @ TSUKUBA (2)
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SOFT PHYSICS @ TSUKUBA (3)
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SOFT PHYSICS @ TSUKUBA (4)
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PHOTON ANALYSIS @ TSUKUBA Direct Photon via Internal
Conversion T. Horaguchi K. Watanabe
Using Hiroshima Cluster & GSI cluster & Tsukuba Cluster
Several presentations in PWG4 Preparation to join PWG4 mini
train is ongoing Pi0 Analysis with EMCAL
T. Horaguchi M. Sano
This analysis has just started now !
Photon analysis is also important for Di-Jet Calorimeter analysis.
Joined calorimeter analysis group.
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SUMMARY & TO DO Established Tsukuba Cluster
For Di-Jet Calorimeter A lot of Simulation works done, and will continue We are very welcome to use Tsukuba Cluster by D-Cal
collaborator. Please notify us if you want ! For Local Data Analysis
Started First Data Analysis @ Tsukuba Several analysis has just started in parallel !
Almost analysis is doing @ Tsukuba Cluster Preparation to join the PWG’s Train is ongoing In this time, we do not use CAF
However, we will move to using GRID analysis to analyze high luminosity data in 7TeV pp and 10TeV pp run as soon as possible !
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WHAT IS J-CAL ? Extension of ALICE-EMCal; same design,
same material, same electronics. Lead-Scintillator sandwich type
sampling EMCal (77 layers), APD readout with WLS.
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EMCal module
(ΔΦ,Δη) ~ (0.025,0.025)2010/1/21 22ALICE Analysis Workshop @ Hirosima Univ.
0 (hadron) triggerJet (sm
all R) triggerJet (la
rge R) triggerGamma trig
gerCloser and closer to
the initial parton
energy
more and more surface bias
given by energy loss
STAR Preliminary
Au+Au 0~10%
,Jet,0 - hadron correlation Comparisons are the most important!
RHIC-AGS’09, Y. S. Lai
QM09, M. Ploskon
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WHERE IS J-CAL ?
In φ, on opposite side of EMCAL In η, next to the PHOS 6 SMs in total.
eta view of ALICE & J-CAL
J-Cal
ALICE EMCAL
eta view of ALICE & J-CAL
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4
PHOS – 5 modules shown
JCal – 6 super modules h~0.7
J-CAL DESIGN (APPROVED BY ALICE CB, OCT. 2009)
B6 Configuration was chosen to have a largest possible jet radii in J-Cal
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