| | Setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50 |
| | Taking Y-88 data overnight. Last flash at 07:34 |
| 0900 | Tower/MC(H35)/MC sensor/Cold Plate = 31.9/26.3/41.2/165 mK, Still = 1.15 K / 0.12 mbar, G1/G2 = 145/150 mbar, 1K Pot = 1.71 K / 20 mbar, Main bath = 52.4% |
| 0940 | Fill LN2 cold trap Dewar. |
| 1205 | Place Cf source inside shield near detector for activation while performing DCRC maintenance. |
| 1245 | For DCRC55, the Qi intercept/Qi slope/Qo intercept/Qo slope calibration register values were set to 8067/01AB/8018/01AB. See instruction at MIDAS. |
| 1505 | Commence LHe transfer (39.2%). |
| 1600 | Finish LHe transfer (89.1%). |
| 1607 | For DCRC50, the Qi intercept/Qi slope/Qo intercept/Qo slope calibration register values were set to 80A3/01A8/8027/01AC. See instruction at MIDAS. |
| 1620 | Measured the bath level through the fill port with a thumper (borrowed from the LHe room). At main bath = 89.2%, the level is 58.9 cm below the top of the fill port. |
| | this seems to put it near the top of the upper part of the IVC. Note: fill port top is approx. 2.75“ above main bath ceiling |
| 1655 | Place Cf source back in safe so that we take only 88-Y data over the weekend. |
| 1700 | After applying firmware calibration settings to DCRCs, attempt to look at pulses. Attaching DCRCs to Ebox causes temperature to spike. Along with zapping SQUIDs, temperature spikes up to ~68mK. Temperature falls quickly, but stabilizes around 50mK. Attempt switching back to not using calibrations, but this doesn't have an affect. |
| | Attempt unpowering DCRCs one at a time. First DCRC55. |
| | No effect. |
| | Unplug DCRC33. |
| | No effect. |
| | Unplug DCRC50. |
| | Effect. |
| 1715 | Fill LN2 cold trap full. |
| | Power DCRC55. Small temperature spike from base, but only a few mK. Plug in DCRC50, slightly larger temperature spike, but settles back down. Plug in DCRC33. Everything seems fine. Zap SQUIDs. Here goes everything. |
| 1740 | Finish looking at channels and adjusting ADC Offsets. DIB2 pC is upside down. Tried relocking. No effect. Zap SQUIDs to see if that helps. |
| 1800 | Zapping fixed it, but then I had to readjust the ADC Offsets. |
| 1808 | Start 36 hours of 30min 88-Y series at -4/+4V with FG=5/2/5, OG=3, with 1000 initial randoms, 1000 ending randoms, 30s flash and 25 minute cooldown before series. Trigger on DIB1 phA with threshold of 30ADC bins. |