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2014/03/18

1100 Fill LN2 cold trap full.
1110 Adjust 1K pot needle valve.
2210 Mixing chamber temperature has increased from 1.65 K to 1.68 K over the course of the day. Temperature of 1 K pot is still unstable, varying from 1.6 K to 1.65 K. Leave 1 K pot as it is for now.
Plugged DCRC31 into DIB 1, DCRC33 into DIB 2. Left connected and monitored for a few hours: everything looks stable. It appears as though problem with DCRC33 hasn't reoccurred.
Commence data acquisition, starting with 8-hour flash followed by 2-hour cooldown. OR trigger on charge channels only: Qi DIB 1 = 32 ADC bins; Qo DIB 1 = 19 ADC bins; Qi DIB 2 ADC bins = 32 ADC bins; & Qo DIB 2 = 21 ADC bins. One half-hour data series for biases in following order: -/+4 V; & +/-4 V. Data series separated by 10 minute flash follwoed by 60 minute cooldown.
2220 Unsure if LEDs are working as unable to see a change in temperature. It's probably fine as mixing chamber temperature of 1.68 K may be too high to see any difference.
2255 Fill N2 cold trap full.