Status of Readout Boards

1
Status of Readout Boards and Gas Monitor
Craig Woody BNL
HBD Working Group Meeting August 1, 2006
2
Status of Readout Boards

• 10 LHS and 10 RHS boards are nearly complete.
  Should have
• remaining 6 LHS and 6 RHS from stuffing
  house at BNL today
• Procedure
• Receive boards at BNL. Check power planes and
  mount through hole
• components ( 30 min/board)
• Check that all channels with test pulse are
  within acceptable output range
• Have found a few bad channels doing this, which
  are repaired before gluing
• Glue on Rohacell backing (4 boards/day)
• Do final testing after gluing. Pulse each
  channel and record each preamp
• output and noise level in data base ( 1
  hour/board)
• Cross talk
• There is no evidence for any cross talk when
  pulsing only one group at a time. There are some
  small effects of cross talk (2-5) when pulsing
  all channels simultaneously (partly due to test
  box)

3
Status

• 5/16 (LHS), 4/16 (RHS)
• completely glued and tested,
• ready for installation
• 4/16 (LHS), 5/16 (RHS)
• glued and ready for final testing
• 1/16 (LHS), 1/16 (RHS)
• had problems after mounting final
• components (shorted power plane,
• no power to few preamps), but have
• now been fixed
• 6/16 (LHS), 6/16 (RHS)
• due to arrive BNL today

Will take two boards (one LHS and one RHS) to
Stony Brook today for test installation on HBD
East. Will try new thermal wire stripping
tool. Will begin installation on HBD West next
week.
4
Gas Transmission Monitor

• New Mini-turbo arrived
• Holes drilled in table for
• vacuum connections
• (required to be done in
• BNLCentral Shops)
• Essentially all components
• now in hand
• Working on Labview program
• to control spectrometer grating,
• translational mirror and current switch
• Should be ready in a few weeks

Mini turbo will be mounted underneath table