Agenda

Operations
- Next run is Run 67, either n,gamma coincidence run or re-run of USD1
- n,gamma coincidence run prep:
  - Run Si HV#4
    - use reduced shunt resistances. (Should we replace the SQUET with the “damaged” SQUID?)
    - bare Am source to calibrate. What position?
  - Availability of PuBe source: we will wait until Vlad Pribiag is finished. Last lab is April 30
    - so start run around April 1, configure detector for ~1 month, then begin using source
  - do we understand the n-flux? will it be high enough?
  - Planning to leave out 4K heat sinking
  - projected threshold of 18 eVee
- USD1 run prep:
  - When? possibly before coincidence run. Seeing if SD will send a student to help
  - may want to double-bond one channel that had unexplained problems (see run 58)
Lab infrastructure
- He-3 circulation pumps
  - still need to send back-up He-3 pump to Oerlikon/Leybold for service/repair
Processing and Analysis
- Run 65 (Si 150mm 5Q 1/2-vacuum-interface)
  - Working on combined R60/65 paper Overleaf
  - Correction/update of study of neutralization loss from surface charge buildup from events
  - CCE uncertainties, radial decrease
- LIPs search - planning to use Run 66 data, best GeHV data.
  - Planning work with Gina and Max for MXP project
- Run 62 (HV#4, Si)
  - planning to work on low-energy calibration, in prep for Run 67
- Run 63 (Ge iZIP pathfinder)
  - need to analyze Cf data
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
- 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