Difference between revisions of "FY2022 beam test high rate summary"

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**run list [https://docs.google.com/spreadsheets/d/1HJXnRIbr646CiAdeprF8JcMBowMJ0t8A/edit?pli=1#gid=1422715418 google spreadsheet]
 
**run list [https://docs.google.com/spreadsheets/d/1HJXnRIbr646CiAdeprF8JcMBowMJ0t8A/edit?pli=1#gid=1422715418 google spreadsheet]
 
**runs divided into conditions: [https://docs.google.com/presentation/d/1R9CSADssyumREaxqnIwN-hKy_BsLrKc1/edit#slide=id.p1 google slides]
 
**runs divided into conditions: [https://docs.google.com/presentation/d/1R9CSADssyumREaxqnIwN-hKy_BsLrKc1/edit#slide=id.p1 google slides]
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*Jimmy's record of detector layout:
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*Detector layout:
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**[https://solid.jlab.org/wiki/index.php/File:Solid_beam_test_table_measurements_18_degree.pdf beam_test_table_measurements_18_degree.pdf]
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**Schematic layout with detector sizes: [https://solid.jlab.org/wiki/images/7/7a/Detector_layout_highrate.pdf pdf] [https://solid.jlab.org/wiki/images/5/55/Detector_layout_highrate.ppt ppt]
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**Jimmy's record [https://solid.jlab.org/wiki/index.php/File:Solid_beam_test_table_measurements_18_degree.pdf beam_test_table_measurements_18_degree.pdf]
 
*Jixie's [https://redmine.jlab.org/projects/solid-ecal/wiki/Hallc_beamtest_runlist online run list] on redmine
 
*Jixie's [https://redmine.jlab.org/projects/solid-ecal/wiki/Hallc_beamtest_runlist online run list] on redmine
 
*Jixie's [https://redmine.jlab.org/projects/solid-ecal/wiki/Cable_map_(signal_&_HV) cable and HV map] on redmine
 
*Jixie's [https://redmine.jlab.org/projects/solid-ecal/wiki/Cable_map_(signal_&_HV) cable and HV map] on redmine

Revision as of 15:17, 19 May 2023

High rate at 18 deg

Goals

  • SPD PID study (need photon samples)
  • ECal PID study (charged electron and pion samples)
  • We need to study LASPD timing

Test Conditions

  • 18 degree test was done during deuteron photo-disintegration experiment
  • target: varies; current: up to 60uA

Run Information

List of Suggested Technical Notes

  • (Mike/Jimmy) alignment and layout
  • (Mike) radiation dosimeter reading
  • (Mike) Runlist (4 plots static for 18 deg linking to dynamic plots, also including 82 and 7 deg), including rates
  • (Darren+someone) Cherenkov analysis
  • (Mike/Zhiwen) summary of rates from preCDR work for each detector (to compare with our beam test)
  • (Jixie) data cooking, pulse finding, integration and deconvolution
  • (Ye) clean sample events – what types of runs to use and how to define them
  • (?) LASPD timing extraction, including "edge-finding" algorithm in decoder

High rate at 7 deg

Goals

  • Rates here were too high for proper PID analysis. We focused on carbon foil (and other thin) targets, and asked 5uA dedicated beam time for 20 minutes a week to check out the system. HVs were kept off during high luminosity running.
  • main goal will be to make sure detectors all work properly
  • Data may be useful to characterize limit of the detectors (under what situation would the detector signal "saturate"?)

Test Conditions

  • The 7 deg run was carried out from January to February 2023, during XEM2 experiments
  • Target information:
    • from Dave Gaskell:
      • 3He: T=5.6 K, P=55 PSI, density=0.041 g/cm3 -- 3He started out around 100 PSI before the leak
      • 4He: T=5.6K P=110 PSI, density=0.129 g/cm3
      • Both targets 10 cm long (nominal)
    • From Nadia Fomin:
      • carbon target: 0.574 g/cm^2 +/- 0.002 (edited)
    • Xiaochao comment: So 3He is slightly thinner than carbon, and 4He is about twice as thick

Run Information

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