List of problematic BTOF trays

List of bad BTOF trays

status as of Oct.'22: 10 bad trays plus one tray (102) with HV issues


  • trays 2, 22, 49:
    • No CAN-bus response
    • need direct access to debug
  • tray 8 (GMT tray):
    • TDIG #4 is missing in CAN-bus response;
    • 1st half of tray reports wrong bunch crossing
    • 2nd half is missing data
  • tray 48:
    • CAN-bus and firmware are fine;
    • trays does not show any data through DAQ path
  • tray 64:
    • TDIG #6 is missing in CAN-bus response;
    • no headers in DAQ path from both tray halves 
  • tray 78, 88:
    • firmware reports fine
    • 1st half tray does not show up (TDIGs do not report to CAN-bus?)
    • 2nd half tray does show data.
  • tray 101 (similar behavior as tray #8, but not a GMT tray)
    • TDIG #2 is missing in CAN-bus responses
    • 1st half is missing in DAQ
    • 2nd half missing (wrong?) bunch ID
    • tray is inaccessible, behind TPC support arm
  • tray 102:
    • bad HV cable, inaccessible
  • tray 119:
    • HPTDC error "0x6"
    • problem with first half of tray(?)

Trays 78, 88, and 119 could be partially recovered if we allow the tray errors to be ignored by DAQ. 

Update [June 6, 2023, Geary Eppley]:
  • two additional trays removed from DAQ in May: trayIDs 16 and 67
  • the following trays are masked out of TOFmult in trigger:
    • 4: hot 4 bit
    • 43: open connection, behind TPC support
    • 85: hot 24 bit, stepped on during TPC sector-21 repair
    • 100: stuck "1" bit, came back Jan.5,'22
    • 103: open connection, behind TPC support
    • 104: hot 8 and 16 bit
    • 117: tray masked Jan.27,'21, "1" bit hot