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Agenda

  • Operations
    • Run 67 will be re-run of USD1
      • Joel's student Joseph set to visit for 1 week. Trying to find out when
        • sync visit with tower assembly, then he'll probably be here long enough to see first pulses
        • or is it better for him to come later, see more of the data taking?
        • from Joel: “A full week at UMN isn't an issue for Joseph. If time to complete everything is an issue, he could stay for a couple extra days. It would help him substantial to be involved in looking at the data afterwards. Do you have any advice on cost-effective housing there?”
      • will double-bond one channel that had unexplained problems (see run 58)
      • disassemble 150mm tower to get Am sources
      • likely starting within a week or so will not interfere with April 1 start for n,γ coincidence run
    • 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
  • 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)
    • LIPs search - planning to use Run 66 data, best GeHV data.
    • Need to start Phonon Collection Efficiency paper (HV2, HV4, iZIP pathfinder)
    • 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