| 0015 | Cease helium transfer. Helium liquid level 95.1%. |
| 0030 | Fill N2 cold trap full. |
| 1850 | Fill N2 cold trap full. |
| | Cease flashing detector. Wait for tower to cool back to base temperature. |
| 2200 | Tower temperature appears to have stabilised at 65.3 mK. Mixing chamber temperature 58.0 mK. |
| 2300 | Noticed that 0 V bias settings for Qi & Qo have reverted back to old, incorrect values. Not sure why this happened, but may be best to flash detector overnight again as it is likely that the crystal isn't neutralised. This has cost us quite a bit of time, and really shouldn't have happened. It's not something that we should need to check everytime we turn on DCRC31, so the question is: why didn't the board remember this value? Is this an indication of a deeper problem? |
| | Write correct Qi & Qo 0 V bias values to DCRC31 and save. Read flash memory to ensure correct values have been set; they have. |
| | Start flashing detector: LED 1 on DIB 1; current 0.6 mA; flash-on time 100 μs; flash-off time 5 ms. Reading back values for Qi & Qo bias from the board indicate that the bias is correct. Leave Ba-133 source in place. Hopefully this is the last time we will encounter this problem. |