Agenda

Operations
- Run 64 (S1502, Si 6“ diam 1”-thick 5Q device).
  - Added copper shielding to side coaxes & extenders
  - Problem with LED wiring solved by swapping SQUETs
  - Tower installed, IVC leak at top of stripline tube seems to be fixed. Also no leak from fridge lines to IVC.
Lab infrastructure
- He-3 circulation pump is noisy
  - probably should change oil
  - may want to send it out for maintenance
  - should have our second pump fixed - it is leaky.
  - from Hassan, June 2015: “f. Repair, scrap or replace one of our existing circulation pumps. We have a leaky circulation pump that should be sent back to Leybold for repair. It leaks intermitently. Rather than repair it, we could ask Leybold to scrap it and purchase a new oil-sealed pump from them. Alternatively, we could ask them to scrap it, and purchase a new dry pump. The dry pump requires far more maintenance than the oil-sealed pump however.”
- plans to try to improve helium recovery
  - add length of copper tubing to recovery line, to warm helium on the way to the meter. Installed.
  - maybe try to recover helium while waiting for the transfer stick to cool before hookup
Processing and Analysis
- Run 63 (Ge iZIP pathfinder)
  - need to analyze bkg data (phonon collection efficiency) and Cf data
- Run 62 (HV#4, Si)
  - n,gamma coincidence: …
- Run 61, HV#2 (Ge)
  - z-fiducialization study (in progress)
- Run 56/Run 54
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
  - 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