| 1110 | Filled LN2 cold trap full. |
| 1245 | Remove Cf-252 source. Mixing chamber temperature 75 mK. Commence data acquisition: 30-second flash followed by 45-minute cooldown; ionisation-only; -/+3.5 V & +/-3.5 V biases; one 30-minute file at each bias; interspersed by 6-second flash and 20-minute cooldown; OR charge trigger at 40 ADC bins. |
| 1735 | Mixing chamber heater power 0.263 μW. Tower temperature 102 mK and rising slowly. Probably stable enough. Commence data acquisition: ionisation-only; -/+3.5 V & +/-3.5 V biases; one 30-minute file at each bias; interspersed by 6-second flash and 20-minute cooldown; OR charge trigger at 40 ADC bins. |
| 2050 | Tower temperature 91 mK. However, plot from sensor reveals that this drop in temperature was witnessed after second flash. Tower temperature appears to have varied between 100 mK and 110 mK while aforementioned data series were collected. Tower temperature appears to have stabilised at 91 mK, so it looks as though one needs to wait for a couple of hours before this happens. Unfortunately, time is not on our side. |
| | Increase mixing chamber heater power to 0.27 μW. |
| 2105 | Noticed tower temperature had fallen to 79 mK. IGH indicates that mixing chamber heater is indeed on and powered. Quickly turn mixing chamber heater off and on. Tower temperature starts to rise… bizarre. Not sure if we've witnessed this problem in the past. |