Latest revision as of 14:53, 21 April 2025

Meeting time and location:

• 9:30 am EST (JLab time) remote only
• Connection information

• ECAL maintenance and performance during the run
  • ECAL scalers before the accelerator maintenance day [1]
  • Checking ECAL modules [2]
  • Issue with the FCAL HV module [3]
  • Flash ADC scalers during first beam [4]
  • Two modules fixed during the accelerator maintenance day [5]
    • ECAL scalers after maintenance day (production at 100 nA on 4.5x10^-4 Al radiator) [6]
  • Commissioning of the ECAL trigger [7] [8]
  • Issues with the readout crate during two first two production nights [9]
• Calibrations
  • First look at Compton scattering events in the ECAL [10]
  • ECAL/FCAL energy and timing [11]
  • ECAL coverage with 2-arm Compton [12]
  • Pi0 calibration [13]
• Monitoring
• Restoring PS test setup [14]
  • Assembling PS prototype [15]

Minutes

Attendees: Sasha, Bill, Yuyao, Olga, Drew, Besha, Vlad, Payton, Axel, Jane, Igal, S.T.

• ECAL HV has been updated using Compton events
  • Individual HV settings for 146 modules
  • Increased HV for most channels
  • Set energy scale for FADC: 2.8 MeV/ADC count
• Maintenance day: used LMS to check detector
  • Found and fixed one hot channel and a couple other suspicious channels
• Trigger timing between ECAL and FCAL has been adjusted
• π0 calibrations under way
  • π0 peaks clearly seen in most channels, but not seen for ~10% of ECAL channels
  • Trying to understand missing peaks -- scalers look good, baselines are fine, not trigger problem...
  • New simplified peak fitting procedure
  • TOF not properly in time, needed for veto