Univ. of Tsukuba & JSPS T. Horaguchi Jan. 21 2010 for the ALICE Analysis Workshop 2010/1/21 ALICE...

ALICE ANALYSIS STATUS@TSUKUBA

~PRACTICE ON GRID/CAF~

Univ. of Tsukuba & JSPS

T. 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 Plan


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)


ANALYSIS FACILITY @TSUKUBA


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


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


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


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 !


ANALYSIS STATUS & PLAN


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


Recoil Di-jet ETjet1>70GeV

Recoil 0-jet ET0>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

2010/1/21 11ALICE Analysis Workshop @ Hirosima Univ.

Improvement in jet energy resolution !

M. Sano, H. Yokoyama,Grad. Student of Tsukuba


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 !


JET FINDING ALGORITHM

14

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

p1

p0

p 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 ?

15

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.


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…


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.


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 !


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.

22

EMCal module

(ΔΦ,Δη) ~ (0.025,0.025)


0 (hadron) triggerJet (s

mall R) tr

iggerJet (large R) tr

iggerGamma tri

ggerCloser a

nd closer to

the initial parto

n

energy

more and more su

rface 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


5

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


2

3

4

PHOS – 5 modules shown

JCal – 6 super modules Dh~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


Univ. of Tsukuba & JSPS T. Horaguchi Jan. 21 2010 for the ALICE Analysis Workshop 2010/1/21 ALICE...

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