1 / 16

Computing GRID for ALICE in Japan

Computing GRID for ALICE in Japan. Hiroshima University Takuma Horaguchi for the ALICE Collaboration takuma@hepl.hiroshima-u.ac.jp 03/27/’07 for ISGC2007. Outline. Introduction LHC ALICE Experiment ALICE Offline Analysis Simulation data Data Flow Computing Grid @ Hiroshima University

charla
Télécharger la présentation

Computing GRID for ALICE in Japan

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. Computing GRID for ALICE in Japan Hiroshima University Takuma Horaguchi for the ALICE Collaboration takuma@hepl.hiroshima-u.ac.jp 03/27/’07 for ISGC2007 T. Horaguchi @ ISGC2007

  2. Outline • Introduction • LHC • ALICE Experiment • ALICE Offline Analysis • Simulation data • Data Flow • Computing Grid @ Hiroshima University • Current Status as a User • Summary T. Horaguchi @ ISGC2007

  3. Introduction • Our purpose for using Grid Computing • Data analysis for the ALICE Experiment @ LHC for the study of the Quark-Gluon Plasma (QGP) • Our Goal for the Grid Computing • Join the Grid as a Tier2 and provide the CPU power for the ALICE Experiment (without a break !) • I will report the status of the computing Grid @ Hiroshima University in this presentation ! T. Horaguchi @ ISGC2007

  4. Large Hadron Collider (LHC) • p+p collisions • 14TeV • Pb+Pb collisions • 5.5TeV/A • The collision energy of LHC is much more than RHIC (0.2TeV/A) ! • Circumference length • 27km • The p+p collisions at 900GeV will be started from this November ! T. Horaguchi @ ISGC2007

  5. ALICE Experiment • ALICE • A Large Ion Collision Experiment • Experiment for the Heavy Ion Collisions@LHC • Quark matter will be produced, which is • High temperature • High density • Long life time • Study of Quark-Gluon Plasma (QGP) PHOS T. Horaguchi @ ISGC2007

  6. ALICE Collaboration 30 Countries, 96 Institutions, 1015 Members (in January, 2007) T. Horaguchi @ ISGC2007

  7. Photon Physics @ ALICE • Photon@ALICE • p+p collisions • Hadron decay • Prompt photon • Comparison with pQCD calculation • Gluon distribution function • Reference data for the heavy ion collisions • Pb+Pb collisions • Hadron decay • Prompt photon • Jet Quenching • Thermal Photon T. Horaguchi @ ISGC2007

  8. Photon Spectrometer (PHOS) • Photon Spectrometer • ElectroMagnetic Calorimeter • PbGO4 Crystal • APD readout • 5 moudules • 64×56 (1 moudule) • The installation will be started from this end of May ! (1 module) T. Horaguchi @ ISGC2007

  9. ALICE Offline Analysis • Simulation Data （December 2006） • pp 900GeV • PYTHIA (Event Generator) • Minimum Bias • 200K event • pp 14TeV • PYTHIA (Event Generator) • Minimum Bias • 20M event • Pb+Pb 5.5TeV will be generated near future • PYTHIA+GEANT+Reconstruction • Event Summary Data (ESD) • Analysis Object Data (AOD) • ALICE Grid (March 2007) • About 8000 node • Average availability : 46% • More than 2000 jobs are submitted in a day. • For Pb+Pb collisions, we need about 20000 node ! T. Horaguchi @ ISGC2007

  10. DAQ T0 CAF T1 T2 T2 ALICE Offline Analysis • Date Flow in ALICE ESD First Reco ESD 2-3 Reco AOD User Analysis On line Analysis Offline Analysis Buffer CASTOR @ T0 T. Horaguchi @ ISGC2007

  11. Computing Grid @ Hiroshima • For a User • Users@Hiroshima University just have been able to submit their jobs ! • For a Host • Machines just have been installed this middle of March ! • CPU • 38×2 (Intel Xeon 5160) • 3GHz • Storage • 42TByte • The machine power will increase in a few years ! • Plan • Install Grid Middleware • Setup ALICE analysis framework • This work will be started from this April (after the ISGC2007 !) T. Horaguchi @ ISGC2007

  12. GRID Computing T. Horaguchi @ ISGC2007

  13. GRID Computing T. Horaguchi @ ISGC2007

  14. Current Status as a user • Pi0 mass distribution • p+p 14TeV simulation data • PYTHIA+GEANT+Reconstruction • 60K event analysis was finished. • More detail analysis is processing with Computing Grid now ! pp minimum bias @ 14TeV Pi0 mass peak T. Horaguchi @ ISGC2007

  15. Summary • ALICE Experiment • The highest energy heavy ion collisions experiment with LHC • The p+p collisions at sqrt(s)=900GeV will be started from this November ! • Photon Physics in Heavy Ion Collisions • Photon Spectrometer • Installation of the computers @ Hiroshima University • The installation just have been finished in this middle of March • The installation of the Grid Middle ware & ALICE analysis framework will be started from this April. • Analysis for the ALICE simulation data with Grid • We just obtained the pi0 mass distribution of the simulation data with Grid. • More detail analysis is processing at Hiroshima University with Grid Computing ! T. Horaguchi @ ISGC2007

  16. First pp run conditions T. Horaguchi @ ISGC2007

More Related