2016/07/27 (Wednesday)
| Setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55(1)/33(2)/50(3), Tower has been cooled below Al transition with mu-metal shield at standard position | |
| DCRCs on overnight. Baked detector for 10 hours last night. Tower temperature held at 0.4 K then fell at 1:50. Cf source on fridge for overnight activation. | |
| 0835 | Tower/MC/Coldplate = 41.3/39.9/163 mK, Still = 1.39 K / 0.075 mbar, G1/G2 = 210/200 mbar, 1K Pot = 1.55 K / 5.5 mbar, MB = 73.6% Boiloff rate good. Yesterday the main bath pressure was released at 37 min and 63 min after finishing the transfer. The second time, very little pressure was released, so probably the first release was adequate. |
| 0840 | Remove Cf source from fridge, return to safe |
| 0845 | Fill LN2 cold trap bath. No problem today with valve getting stuck. Maybe it was overfilled yesterday and now it's at an OK level/pressure. |
| 0855 | Check phonon channels, all twelve look OK |
| 0859 | |
| 1000 | Start 30min background series at -4/+4 V with FG=5/2/5, OG=8/3/8, with 1000 initial randoms, 1000 ending randoms, with 30s flash and 25 minute cooldown between series. Trigger on DIB1 phA with threshold of 30ADC bins, with 150 us pileup cut window. |
| 1104 | Start 30min background series at -6/+6 V with FG=5/2/5, OG=8/3/8, with 1000 initial randoms, 1000 ending randoms, with 30s flash and 25 minute cooldown between series. Trigger on DIB1 phA with threshold of 30ADC bins, with 150 us pileup cut window. |
| 1214 | Start 30min background series at -2/+2 V with FG=5/2/5, OG=8/3/8, with 1000 initial randoms, 1000 ending randoms, with 30s flash and 25 minute cooldown between series. Trigger on DIB1 phA with threshold of 30ADC bins, with 150 us pileup cut window. |
| 1505 | Commence baking the detector for 15 hours (until 0600 tomorrow), to once again improve phonon collection efficiency. |
| 1720 | Fill LN2 cold trap full. |