| | Current setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50. |
| | Overnight: taking Y data, last flash at 7:36. |
| 0825 | Tower/MC(H35)/MC sensor/Cold Plate = 31.0/25.4/39.0/143 mK, Still = 1.09 K / 0.10 mbar, G1/G2 = 115/110 mbar, 1K Pot = 1.64 K / 8 mbar, Main bath = 55.6% |
| | 1K Pot pressure and temperature have been falling steadily over the last 7 hours |
| 0830 | Fill LN2 cold trap Dewar. |
| 0920 | Notice that DIB2pB is railed. Looking at PSDs from overnight data it seems that something went wrong in the first series and it was dead throughout. Since this is Side2pA it's an outer phonon rail, so maybe not 100% critical… but mostly this is bad data. |
| 1030 | It looks like DIB2pB may have been in the state where a relock of the SQUID would temporarily unrail the channel, giving it the appearance of a good channel, but after a flash or changing of settings, the channel would then rail again, which is no good for overnight data. The proper and more permanent fix for this issue is to change the driver offset until a new value can be found, which keeps the channel unrailed for a more permanent period of time. |
| 1230 | Place Y-88 source inside shield at optimal height. |
| 1234 | Start 2 cycles of 30min runs of Y data at +/-4V, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown in between. With all trigger thresholds set to 65ADC bins. |
| 1310 | 1K Pot pressure & temperature continue to creep down, to 1.62 K / 7.0 mbar. Open needle valve about 5-10 degrees wider. Peaks to 1.8 K / 55 mbar, then oscillates a bit, stabilizing at 1.72 K / 22 mbar |
| 1425 | Looked at the difference between Tower temperature and MC temperature during two successive detector flashes: |