Teleconference link:	https://fnal.zoom.us/j/9082275310
Domestic:	1-646-558-8656 (US toll)
Domestic:	1-408-638-0968 (US toll)
Access code:	908-227-5310

Agenda

Run 70 (GeHV n,gamma NR calibration)
- Setup:
  - Replaced standard 4K heat-sinking.
  - Changed how we wire HV to the electrode to bypass SQUET
  - Modified one unused SQUET channel by shorting the TES leads. The purpose is to study noise, IbIs etc during cooling to get a better handle on the SQUID card temperature.
- Status: Fridge running fine, 39 mK
- Now taking PuBe data. quick look at current PuBe spectrum
  - note: the rate of the 10keV line is higher than I thought. We do seem to have activated the detector above the saturation point (1.83 Hz). On July 23 the 10keV line was around 13 Hz - on Aug 3 it's around 7 Hz. The decrease is close to what's expected. (note that I seem to be finding some discrepancy in the ways that I'm calculating write efficiency…)
Run 68 (n,gamma with S101) analysis:
- Migdal analysis:
  - toy signal fits, as shown previously
  - work on calculating the Migdal effect
- A look at the Geant simulation data
- Data not yet looked at:
  - Trigger study data
  - Hold-time runs at different biases done, haven't looked at them yet
  - Have reprocessed -80V Na data. Used -125V balancing factors, still need to check if those are optimal (if not we should redo it)
Lab and infrastructure
- Leak detector: replacement parts arrived. Jacob and Jasper reassembled it. Need to fill with oil and test it.
- Transferring old raw data from /cdms1 to Google shared drive. Have moved 1.5 TB so far.
- PuBe source: plan is to take over the source on our permit, house it in PAN443b, the right cleanroom. We've been storing it in the steel box there with lead, now we will use the “howitzer”.
- Sten returned DCRC55(1) a while ago. We're currently using it. We should ask him again some time if he can diagnose some of the DCRC glitches.
Future 150mm runs
- 150mm w/phonons - need to design 600mK rod to accommodate 150mm cans
- Received 4/3-inch DIBs from TAMU - now we can house either detector for phonon readout (would need to machine faces on 4/3-inch housing for DIBs)
- S1501 and S1502 sent back to TAMU
- We have decided we can run 8 phonon channels
  - Preferred DIB-pad layout: two DIBs separated by 120 degrees
  - Himangshu's mask design: PDF download
  - Will use existing vacuum-interface electrode, mounted on side opposite the phonon side
  - Will connect directly to two DCRCs, with one diverter board to route one tower wire to HV connection
  - We'll want LEDs - are there some mounted on the DIBs? We can mount external LEDs too - existing electrode has mounts.
- First 150mm phonon detector will be monolithic, but “donut+hole” arrangement (active veto) proposed as well.
- Aiming for May to finish fabrication and start run.
Other future runs
- Future HVeV runs?
  - Berkeley can help us with a Soudan-style housing mount (3“ or 4”?)
  - then use original tower, can try different heatsinking for colder SQUID card
  - would need to install optical fiber
    - through top or through stripline tube? need vacuum feedthrough
    - Look at Prisca's deuterium lamp/monochromator/filters, glass UV fiber
  - Is PuBe NR calibration feasible?
    - 1×1×0.4 cm^3 is 630× smaller than SNOLAB detector. Anthony estimates 25 events/day (over full spectrum) for Si, 250 events/day for Ge. any chance we could get multiple chips?
    - Nick's idea: sandwich between two 4“ Ge detectors for gamma coincidence (large solid angle coverage)
- Other ideas:
  - run SiHV with Nick's movable Am source (or with multiple Am sources)
  - run SiHV with no 4K heatsinking
  - re-run USD1? do we have any additional ideas to test it?
  - anything else?

Run 62 Update
- Pulse Shape update here