You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 65 Next »

 

General Info

Documents

Software

 

ECAL Calibration Tasks

  • Alignment
    • based on survey
    • based on tracking
  • Energy
    • FEE
      • absolute
      • dedicated FEE runs and singles triggers
    • Møllers and WABs
      • absolute
      • 4.4 GeV and positron trigger should greatly reduce their statistics/usefulness
      • singles and old-pair triggers may help
    • Cosmics
      • relative, before and after the run
    • LED
      • relative, before and during the run
    • Edge corrections
      • based on tracks' y-intercept at ECAL relative to ECAL y-edge
  • Time
    • channel offsets
    • time-walk
    • RF
      • signal shape is different relative to 2016
      • potentially more important for positron/singles triggers than for pairs

HODO Calibration Tasks

  • Gains
    • Gains were calculated during the run, several time throughout the run
    • We have observed gain variation as a function of the Luminosity, and a tiny dependence as a function of time
    • For production runs, a single run from every day (few days) can be used to calculate gains
    • For low Lumin runs, a single run can be used for each Luminosity
    • About 15-20 file will be needed
    • Format? Either hpstr/DST with hodo information should be available, or I have a simple ntuple that gives necessary information
  • TIme
    • I am not sure how hodo timing can be improved, signal shapes need to be investigated (Is there a significant need to improve it?)
    • At this moment the hit time is defined as a threshold crossing time
  • Alignment
    • Hodo acceptance is covering all the ECal/SVT acceptance, Efficiency studies during the run didn't show any efficiency loss close to edges of the calorimeter.

Meeting Agendas/Minutes

October 1, 2019

  • one
  • two
  • No labels