2013/02/25
| 0320 | Pressures in P1 & P2 are 70 mbar & 60 mbar respectively. Mixing chamber temperature 2.1 K. Mixture appears to have condensed. Start automatic circulation procedure. |
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| 0330 | Fed Cricket 4 pellets. |
| 0440 | Valve V6 on IGH fully open. Stop automated circulation procedure. Reduce 1 K pot temperature to 1.55 K. Mixing chamber temperature 125.9 mK, falling slowly. Hopefully there's enough cooling power to get down to <60 mK. Shall leave fridge in this state for a few hours to determine our base temperature. |
| 0510 | Fill N2 cold trap full. Mixing chamber temperature 121.6 mK. |
| 0935 | Mixing chamber temperature 103.2 K, which would be fine for ionisation-only measurements… it's still cooling slowly though, which is a little unexpected. Will continue to monitor rate of descent as a function of time. |
| 1624 | Fed Cricket 4 pellets. |
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| Filled LN2 cold trap full. | |
| 1815 | Mixing chamber temperature 62.1 mK and still falling. If anything, rate appears to have increased. Plug in DCRCs. |