1 / 25

ALICE Analysis Status@Tsukuba ~Practice on GRID/CAF~

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

azia
Télécharger la présentation

ALICE Analysis Status@Tsukuba ~Practice on GRID/CAF~

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ALICE Analysis Status@Tsukuba~Practice on GRID/CAF~ Univ. of Tsukuba & JSPS T. Horaguchi Jan. 21 2010 for the ALICE Analysis Workshop ALICE Analysis Workshop @ Hirosima Univ.

  2. Outline • Status @ Tsukuba Group • Analysis Facility @ Tsukuba • Network @ Tsukuba • Tsukuba Cluster • Analysis Status & Plan • Single & Di-Jet • Photon (pi0 & Direct photon via internal conv.) • Soft Physics (Mean pT & Accumulative Corr.) • Summary & Future Plan ALICE Analysis Workshop @ Hirosima Univ.

  3. 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) ALICE Analysis Workshop @ Hirosima Univ.

  4. Analysis Facility @Tsukuba ALICE Analysis Workshop @ Hirosima Univ.

  5. 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 GBytewill 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 ALICE Analysis Workshop @ Hirosima Univ.

  6. NetWork @ Tsukuba Group Hep-net GateWay • Private Network • Local Cluster(16nodes) • Private PC（～15nodes） • Local Cluster • PHENIX / ALICE • CPU (144core) • Xeon E5345 2.33GHz • 7nodex 2cpu x 4core • Memory / core ~ 1GByte • Xeon E5310 1.60 GHz • 7nodex 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 Local Cluster Private Network Local Disk PC WN PC Local Disk PC Condor Server Disk Server ALICE Analysis Workshop @ Hirosima Univ.

  7. ALICE Simulation & Data Analysis • ALICEData 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 ALICE Analysis Workshop @ Hirosima Univ.

  8. Management for Cluster • 1 Staff & 5 Students are working • Staff • T. Horaguchi • Student • K. Watanabe • D. Sakata • M. Sano • H. Yokoyama • Y. Watanabe • 5 students are expert & super heavy user of our cluster ! ALICE Analysis Workshop @ Hirosima Univ.

  9. ANALYSIS Status & Plan ALICE Analysis Workshop @ Hirosima Univ.

  10. 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 ALICE Analysis Workshop @ Hirosima Univ.

  11. Recoil Di-jet ETjet1>70GeV 0 in PHOS/J-cal  in PHOS/J-cal EM-cal EM-cal Recoil -jet ET>30GeV Recoil 0-jet ET0>30GeV jet (R<0.3) in J-cal M. Sano, H. Yokoyama, Grad. Student of Tsukuba EM-cal ALICE Analysis Workshop @ Hirosima Univ.

  12. Improvement in jet energy resolution ! M. Sano, H. Yokoyama, Grad. Student of Tsukuba ALICE Analysis Workshop @ Hirosima Univ.

  13. 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 ! ALICE Analysis Workshop @ Hirosima Univ.

  14. KT jet Cone jet Jet Finding Algorithm FastJet:sequential clustering algorithms http://www.lpthe.jussieu.fr/~salam/fastjet kT algorithm Cambridge/Aachen algorithm anti-kT algorithm Algorithm Parameters - R size - pTcut - Jet threshold arXiv:0802.1189v2 [hep-pn] (2008) ALICE 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.

  15. Which is the best algorithm ? We analyze for closest Jet to parton Δφ , Δη= parton axis – jet axis This work has been done by D. Sakata & T. Horaguchi. pThard 100GeV/c Jet threshold 20GeV/c Δϕ resolution Δη resolution measured energy Resolution : σ of sharp gaussian Performance of energy reconstruction of Jet with anti-kT algorithm is about 50% better than kT algorithm! kT algorithm anti-kT algorithm Cambridge algorithm ALICE Analysis Workshop @ Hirosima Univ.

  16. 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… ALICE Analysis Workshop @ Hirosima Univ.

  17. SOFT Physics @ Tsukuba (2) ALICE Analysis Workshop @ Hirosima Univ.

  18. SOFT Physics @ Tsukuba (3) ALICE Analysis Workshop @ Hirosima Univ.

  19. SOFT Physics @ Tsukuba (4) ALICE Analysis Workshop @ Hirosima Univ.

  20. 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. ALICE Analysis Workshop @ Hirosima Univ.

  21. 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 ! ALICE Analysis Workshop @ Hirosima Univ.

  22. What is J-Cal ? EMCal module • Extension of ALICE-EMCal; same design, same material, same electronics. • Lead-Scintillator sandwich type sampling EMCal (77 layers), APD readout with WLS. (ΔΦ,Δη) ~ (0.025,0.025) ALICE Analysis Workshop @ Hirosima Univ. 22

  23. ,Jet,0 - hadron correlation Comparisons are the most important! RHIC-AGS’09, Y. S. Lai Closer and closer to the initial parton energy Gamma trigger Jet (large R) trigger STAR Preliminary Jet (small R) trigger 0(hadron) trigger more and more surface bias given by energy loss Au+Au 0~10% QM09, M. Ploskon ALICE Analysis Workshop @ Hirosima Univ.

  24. ALICE EMCAL 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 eta view of ALICE & J-CAL J-Cal ALICE Analysis Workshop @ Hirosima Univ. 5

  25. J-Cal Design (approved by ALICE CB, Oct. 2009) JCal – 6 super modules Dh~0.7 4 3 2 PHOS – 5 modules shown B6 Configuration was chosen to have a largest possible jet radii in J-Cal ALICE Analysis Workshop @ Hirosima Univ.

More Related