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Feasibility of intercalibration of CMS ECAL supermodules with cosmic rays

  • W. Bertl
  • K. Deiters
  • Q. Ingram
  • D. Renker
  • T. Sakhelashvili
  • E. Frlez
Scientific Note

Abstract.

The feasibility of using cosmic rays to make an intercalibration of the ECAL Supermodules before installation in CMS has been investigated. In a test with a single crystal a clear signal with a width of 15% rms was seen, with rates as expected. Simulations using a simplified detector geometry and a parameterisation of the vertical cosmic ray muon flux indicate that it is feasible to use the surrounding crystals as veto counters to ensure a longitudinal trajectory through the crystal, without introducing a large systematic error. The statistical error would be around 1% for one week of running.

Keywords

Field Theory Elementary Particle Quantum Field Theory Systematic Error Statistical Error 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    The Compact Muon Solenoid Technical Proposal, CERN/LHCC 94-38, 1994Google Scholar
  2. 2.
    The CMS Electromagnetic Calorimeter Technical Design Report, CERN/LHCC 97--33 (1997)Google Scholar
  3. 3.
    Q. Ingram et al., JHEP (http://jhep.sissa.it/) Proceedings Section prHEP-hep2001/256; Z. Antunovic et al., Nucl. Instr. Meth. A 537, 379--382 (2005); K. Deiters et al., CMS Note 2004/008 and Nucl. Instr. Meth. A 543, 549 (2005)Google Scholar
  4. 4.
    Particle Data Handbook, Phys. Lett. B 592 (2004), and references thereinGoogle Scholar
  5. 5.
    CMS internal report, unpublishedGoogle Scholar
  6. 6.
    R. Brun, F. Bruyant, M. Maire, A. C. McPherson and P. Zanarini, GEANT 3.21, DD/EE/94-1, CERN, Geneva, 1994Google Scholar
  7. 7.
    E. Frlez et al., Nucl. Instr. Meth. A 526, 300--347 (2004)Google Scholar
  8. 8.
    K. Deiters et al., Nucl. Instr. Meth. A 461, 574--576 (2001)Google Scholar
  9. 9.
    To be published CMS ECAL collaborationGoogle Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2005

Authors and Affiliations

  • W. Bertl
    • 1
  • K. Deiters
    • 1
  • Q. Ingram
    • 1
  • D. Renker
    • 1
  • T. Sakhelashvili
    • 1
  • E. Frlez
    • 2
  1. 1.Paul Scherrer InstituteVilligenSwitzerland
  2. 2.Department of PhysicsUniversity of VirginiaCharlottesvilleUSA

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