JEF meeting, April 25, 2025

Meeting time and location:

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

Agenda

• ECAL maintenance and performance during the run
  • HV module disconnected from the EPICS control
  • Bad flash ADC for reference PMTs
  • Low-level histograms [1]
  • Adjusting high voltages [2] (based on the run period 10, iteration 0)
  • Recent ECAL occupancy, production at 300 nA with 4x10^-4 X0 Al radiator [3]. Suspicious modules after the accelerator maintenance day
• Calibrations
  • Initial HV settings using Compton scattering events [4]
  • Pi0 calibration page [5]
    • Pi0a are clearly seen for most ECAL modules (except the innermost ring)
• Monitoring
• Restoring PS test setup [6]
  • The prototype has been assembled and tested. Ready for installing in Hall D
    • Move it to the Hall on Wednesday next week (?)