Wednesday, November 13, 2019, 11:00 EST

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1. Dial Toll-Free Number: 1-888-240-2560 (U.S. & Canada)
2. International participants dial:
Toll Number: 1-408-740-7256
3. Enter meeting ID:140287970

Desktop sharing: 


Meeting room = Cebaf Center F227


  • Hall A will start earlier than originally planned - Monday, November 25
  • Hall will be locked up for high current test Wednesday or Thursday

Electron detector

  • Detector installation
    • motion ok
    • noise from Analog boards about +/-5 mV
    • might be issue with plane A (2uA) and D (12uA), plane B 25 nA, meter for thick plane might have died from radiation
    • adapters still need to be done
    • VXS crate installed with VETROC, VTP installed, need to configure NFS mounts to work
    • almost ready to look at cosmics
  • QWAD adapter boards
  • Counting DAQ


  • Mirrors replaced
  • Entrance scans
  • Cavity birefringence scans
  • Polarization strategy

Photon Detector

  • PREX checks - complete (?)
  • CREX preparations


  • ACC0 - laser-cycle analysis
  • ACC4 - laser cycle analysis


  1. Electron Detector
    1. Motion is working
    2. Adaptors for cables to VETROC will take 2 weeks
    3. QWAD adaptor boards ordered
    4. Counting DAQ crate now in hall
  1. Laser
    1. Polarization leaving the cavity has low DOCP. Is this caused by the mount causing birefringence in the mirror surface or substrate? Something worth testing.
  1. Photon detector
    1. 16 mV constant LED during LED linearity tests.
    2. No spare PMT available. Will use PREX tube after doing all the linearity measurements that we think are necessary.