| 0450 | DCRC31 (DIB 2) 15 V power supply seemed to have turned off and on again at some point. Helium transfer was possible cause. As a result, FET had frozen. Turned FET heater on to thaw FET, and turned off again once it had become self-heating. Unfortunately, this meant that the SQUIDs had to be rezapped. Took a few hours for cryostat to cool down again. Restored timing link. |
| | Commence data acquisition with Cf-252 source: 4-hour flash followed by 2-hour cooldown (unsure of how long Side 2 channels were floating, so long flash to be safe). Twelve data series each of length 10 minutes, taken at +/-3.5 V bias, interspersed by 6-second flash and 20-minute cooldown periods. OR trigger on phonon channels. |
| 0530 | Fill N2 cold trap full. |
| 1735 | Fill N2 cold trap not full: about a litre shy. |
| 1840 | Commence data acquisition with Cf-252 source: 30-second flash followed by 45-minute cooldown. Twenty-four data series each of length 10 minutes, taken at +/-3.5 V bias, interspersed by 6-second flash and 20-minute cooldown periods. OR trigger on phonon channels. |