Agenda

Operations
- DCRC tests of the freezing readout problem:
  - our 3 DCRC RevC.1 boards all behave the same:
    - get stuck when charge trace length is 30.2768 ms and other "bad" values
    - don't seem to get stuck at most trace lengths including standard 3.2768 ms
  - DCRC52(6) from Berkeley does not get stuck at the “bad” lengths or any other lengths we've tried, though Bruno said it was having a similar problem.
- Run 65 preparations (S1502, Si 6“ diam 1”-thick 5Q device).
  - Interchannel shorts were fixed by bending the wirebonds
  - Tower has been reinstalled
- Plan for Run 66: re-run HV#2
  - can more channels be connected?
  - should we reduce shunt resistances?
  - should we try floating the DCRCs? (Now it appears we have enough to read 6 channels separately on each side…)
Lab infrastructure
- He-3 circulation pumps
  - oil has been changed. May have lost a little mixture in the process.
  - need to send back-up He-3 pump to Oerlikon/Leybold for service/repair
- Allison is leaving! Whose idea was this??
Processing and Analysis
- LIPs search - idea to look in our HV data, Runs 61 (Ge) and 62 (Si). How sensitive are we?
- Run 64: look for lines in the shorted channels (thought I saw lines in earlier data). Would be useful to understand this more to see if our Am rates are good.
- Run 63 (Ge iZIP pathfinder)
  - need to analyze Cf data
- Run 62 (HV#4, Si)
  - n,gamma coincidence: timing improvements
- Run 61, HV#2 (Ge)
  - z-fiducialization studies
- Run 56/Run 54: any follow-up on G106a?
Old/continuing items:
- exploring ideas for improvements without upgrade: float DCRCs for symmetric biasing Proposed Scheme, decrease Rshunt in SQUETs (had a look at this, a little hard to set up: SQUET picture), sidewall sources?
- Run 62 (HV#4, Si) post-mortem: two “bad” channels seem not to be wiring problems, maybe the problem is on the detector (photos)
- Run 60, 6“ detector paper - Plan to edit and publish without 5Q data
- Lab infrastructure
  - plans to try to improve helium recovery
    - add length of copper tubing to recovery line, to warm helium on the way to the meter. We have used it and it seems to do something. But no indication yet that it is improving recovery.
    - maybe try to recover helium while waiting for the transfer stick to cool before hookup
  - Update on He recovery efficiency, slow transfer test
  - DAQ and data pipe
  - DAQ upgrade - discussed with Bruno about IbIs tool development
  - Data storage and backup:
    - Need to copy all Run 60 and some Run 61 data to SLAC
  - Autoprocessing and data organization development:
    - currently autoprocessing suspended, no “official” processing for Runs 60, 61, 62
    - clean up database - some info missing. Consider adding additional info
- Possible plan to modify DCRCs (resistor swap) so we can increase front-end gain, improve IbIs (suggestion from Bruno)
- IF (not likely) new DCRC RevC.2 arriving from Bruce in Denver then
  - missing resistors on 3 QET channels, we've ordered some