June 1st 2024

Subsystem updates

https://redmine.jlab.org/projects/sbs-daq-gep?jump=welcome

https://redmine.jlab.org/projects/sbs-daq-gep/issues

• ECAL
  • BigBite being uncabled
  • are distances optimizaed for calibration ? HIgh Q2 for fully popoulated, low Q2 could go closer, need to be checked ?

• HCAL
  • need better calibration procedure and HV setting
  • might want to run at higher gain
  • digital trigger should be better since coefficient can be included
  • noisy PMTS , at limit
  • possible loss of efficiency for GEn, GEn RP
  • 1 to 3 MHz HCAL trigger during experiments
  • keep analog trigger for cross
  • no plan for change of PMTs during down
  • check problematic channels for Gep : noise
  • add amplifiers on channel with low gain ?
  • LED ? Useful for PMT characterization
  • MIP HCAL calibration ?
  • GEp Hydrogen scattering : recasterring and energy loss in analyzer - HCAL at 10 meters
  • recommended HV channel during GEn RP : some HV might have been highers that needed to be - edge can be manually tweaked -

• CDet
  • focusing on what is needed to get detector ready to put in hall and put together : cables , infrastructure
  • need to think about calibration
  • set up VETROC
  • need help with cable setup : check in hall
  • need ribbon cables from detector to patch
  • ribbon cable from repeater to VETROC crate length
  • SHV feed through and patch panel ordered
  • test of power supply for NINON : voltage drop from patch panel - with length planned in the hall
  • VETROC adapter : connector give
  • spreadsheet for cables availbale, will put link in wiki
  • Peter, Rakph, SULI student, Andrew Master student
  • VETROC software : send email to Ed Brash about software
  • gain matching , discriminator threshold need to be calibratied quickly at beginning
  • threshold set on NINO with potentiometer -
  • TDC and TOT : for amplitude calibration
  • PMT gain curves ? Have all of them but the last one
  • FADC ? - not planned to have signals -
  • plan for a few analog cables for FADC - maybe 64 to 100

• Trigger
  • lookup tables for trigger, Kipp has already look up tables for FPGA implementation

• GEMs
  • lookup tables for GEMs
  • GEM configuration not finalized yet
  • pixel readout
  • check with Nilanga and simulation people Eric, Kipp
  • DAQ modes : full readout, with supression, with ROI
  • selective readout : MPD level or VTP level -