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2012/12/21

1100 Fed Cricket 3 pellets.
1100 Fill N2 cold trap full.
1815 Plugged DCRC33 into DIB 1. Base temperature rose from 56.9 mK to 57.5 mK. She's been holding steady for the last couple of hours. Turn on board's clock. Things look good so far.
1915 Fed Cricket 4 pellets.
2050 Plugged DCRC32 into DIB 2 & DCRC31 into DIB 1. Having problems with DCRC32: difficult to establish connection; and once established, difficult to maintain it. This isn't particularly unusual. Mixing chamber temperature has fallen from 65 mK to 57.7 mK after switching on FET heaters (and switching them off again!), setting up power supplies on boards and setting up the timing link. Mixing chamber temperature is still falling, but will probably reach some base value before rising a little again and stabilising.
Fill N2 cold trap full.
2105 Mixing chamber temperature 57.6 mK. Start flashing detector: LEDs 1 & 2 on DIBs 1 & 2 only; usual settings of current -0.6 mA, flash on time 100 μs, flash off time 5 ms.
2315 Mixing chamber temperature reached 176 mK. Stop flashing detector. Wait for cool down.