| | Setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50 |
| | Taking Y-88 data overnight. Last flash at 06:03. Problem with data however: there is no data written to /chocula after Jan 16 13:41. |
| 1020 | Tower/MC(H35)/MC sensor/Cold Plate = 31.5/26.1/41.1/161 mK, Still = 1.25 K / 0.12 mbar, G1/G2 = 170/150 mbar, 1K Pot = 1.73 K / 19 mbar, Main bath = 32.5% |
| 1025 | Measure main bath level with thumper. At 32.2%, LHe level is 88.4 cm below top of fill port. |
| 1032 | Begin LHe transfer at 30.8% |
| 1035 | Fill LN2 cold trap Dewar. |
| 1050 | He gas bottle ran out, switched to new one |
| 1134 | End LHe transfer at 91.1% |
| 1200 | Checking phonon channels: |
| | DIB1pC railed - relock brings it back |
| | DIB3pA shows no pulses. Notice that all phonon lockpoints are set to -2.53 in ODB - this isn't right. Set DIB3 lockpoints to -4.67/-2.83/-1.95/-2.53 mV, as on Aug 25 from Run 54. Also set SQUID biases and QET biases to values from Run 54 (they also looked wrong on ODB). |
| | Try DIB3pA QET bias = 110 uA (previously 100.5), Offset = -0.44 V. See pulses. |
| 1235 | All phonon channels show pulses. A little low frequency noise visible. Let some pressure out of cryostat (currently bath at 90.6%) |
| 1240 | Start 24 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. |