Agenda

Operations
- Run 66: re-run of HV#2
  - Overview of noise resolution versus HV, comparing Run 61 and 66
  - Passive Johnson noise and R_par
- Run 67 plans
  - do we have money to do another n,gamma coincidence calibration run?
  - if so, 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: Vlad Pribiag will know more by end of week. May be unavailable for much of the semester.
  - plan to replace striplines first
  - do we expect the threshold to be low enough?
    - checking Si HV noise resolution from Run 62, with standard Rshunt
  - do we understand the n-flux? will it be high enough?
  - should we leave out 4K heat sinking with phonon-only detectors?
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
  - a few more studies to do. This was reported on briefly at last Friday's R&D meeting - we will give more detail at the next meeting.
- LIPs search - idea to look in our HV data, Runs 61 (Ge) and 62 (Si). How sensitive are we?
  - quick back-of-the-envelope suggests we can improve on CDMS2
- Run 63 (Ge iZIP pathfinder)
  - need to analyze Cf data
- Run 62 (HV#4, Si)
  - n,gamma coincidence OF timing
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