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Agenda

  • Operations
    • Run 63 (G132, Ge iZIP "pathfinder") in progress.
      • Base temperature very good, 26 mK!
      • Wiring error discovered. Four channels not working: one not connected, one is shorted to chassis (sorta worked early in the run), one was only intermittently connected, and one was fine during checkouts but doesn't show pulses now.
      • Shield is up, event rate down from 148 Hz to 102 Hz
      • Early evidence that small applied charge bias affects phonon channels. It may be difficult to run with a reasonable bias…
      • Beginning IbIs measurements
      • Haven't begun taking data yet, will want to
        • measure charge collection efficiency
        • measure phonon collection efficiency,
        • characterize position reconstruction, fiducialization
        • etc.
    • Future 6“ run (1”-thick 5Q device). Detector now at UMN, needs to be wirebonded
      • Constructing prototype extender-plug
    • Continued K100 support through both Project and Operations - assume no SNOLAB upgrade
      • exploring ideas for improvements without upgrade: float DCRCs for symmetric biasing Proposed Scheme, decrease Rshunt in SQUETs
  • Processing and Analysis
    • Run 62 (HV#4, Si)
      • Phonon collection efficiency: latest data taken at 10, 20, 30, 70, 100 V, still need to analyze
      • n,gamma coincidence, first plots
    • Run 61, HV#2 (Ge)
    • Run 56/Run 54
  • Old/continuing items:
    • 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
    • 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