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ACORDE Status Report: Geometry and Analysis Updates (March 15, 2010)

This report details the latest updates on the ACORDE geometry following a new survey, including adjustments in module positions and enhancements in the AliACORDE version for better track efficiency and alignment. Key updates involve new procedures for calculating module positions and geometry structures within the ALICE reference system. The document also outlines analysis efforts in cosmic data runs, seeking to improve track multiplicity detection and overall ACORDE performance. Future actions include the implementation of offline alignment and QA reference histogram completion.

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ACORDE Status Report: Geometry and Analysis Updates (March 15, 2010)

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  1. ACORDE STATUS REPORT Offline Week March 15 th. 2010

  2. Geometry From the last report:

  3. Geometry After the new survey, we have now: The two previous points and one in the center of the Module. O OutSide Y P I Z InSide X ALICE reference system

  4. Geometry • The class AliACORDEv1, AliACORDE & AliACORDEConstants has been updated: • AliACORDE: GetITSGeometry  Get4CentralModulesGeometry. • AliACORDEConstants: added the procedure InsideModulePositionX(Int_t iModule) • AliACORDEConstants: added the procedure InsideModulePositionY(Int_t iModule) • AliACORDEConstants: added the procedure InsideModulePositionZ(Int_t iModule) • AliACORDEConstants: added the procedure OutsideModulePositionX(Int_t iModule) • AliACORDEConstants: added the procedure OutsideModulePositionY(Int_t iModule) • AliACORDEConstants: added the procedure OutsideModulePositionZ(Int_t iModule) • AliACORDEConstants: added the procedure CentersideModulePositionX(Int_t iModule) • AliACORDEConstants: added the procedure CentersideModulePositionY(Int_t iModule) • AliACORDEConstants: added the procedure CentesideModulePositionZ(Int_t iModule)

  5. Geometry Update in the names of the Alignment Volumes //      ALIC_1  //          |---> ACORDE_1        //                      |----> ALL_ACORDE_MODULES_1/ACORDE_MODULE_%d (d:0->to->59)  //                      |----> ACORDE_SUPPORT_BARS_2    |--> BARS&SUPPORTS

  6. Analysis • From the macros that we have of the analysis we can: • Look for events with high multiplicity of tracks (in cosmic data taking runs). • Look for the efficiency of ACORDE (from ESD-tracks). • Look for the alignment of ACORDE modules. • Should be ported to svn repository for ACORDE? From: OLD MC simulation FROM 2010 Cosmic Data taking

  7. Work in progress cout << "<<< *** Version AliACORDEv2 of ACORDE *** >>>" << endl; cout << "<<< *** Creating ACORDE Geometry with ALICE's Cavern and Shafts *** >>>" << endl; CreateAcorde();  Geometry of ACORDE. CreateALICECavern();  Cavern of ALICE. CreateALICEShafts();  Shafts of ALICE. ACORDE+Molasse+ Alice magnet Shafts

  8. Work in progress Corsika + AliRoot We use the corsika output as AliRoot input in a special generator: AliGenCorsikaMRC First muon generated as the output of corsika and propagated through the Molasse alpine until the ACORDE and TPC detectors .

  9. To-do • Implement the offline alignment (P. Podesta) • Finish the QA reference histograms with the new MC. • Further comments: • P. Podesta podesta@fnal.gov • A. Fernandez afernan@mail.cern.ch RUN: 110519 Chunk: 10000110519022.20 # Event:6353 Trigger: C0SCO-ABCE-NOPF-FIRST C0SH2-ABCE-NOPF-ALL C0EMC-ABCE-NOPF-MUON #Tracks: 459 #Muons: 220 Run: 109547 Chunk: 109547020.10 Event: 3723 # of tracks: 182 # of muons: 86

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