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2015/10/30 (Friday)

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Current setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50.
Overnight: Taking Cf data. Last flash at 7:22. Tower temp stable between flashes.
0845 Tower/MC(H35)/MC sensor/Cold Plate = 31.2/26.8/41.6/160 mK, Still = 1.39 K / 0.11 mbar, G1/G2 = 125/120 mbar, 1K Pot = 1.68 K / 13 mbar, Main bath = 19.8%
G2 has fallen below G1, so basically back to normal.
0850 Fill LN2 cold trap Dewar
0854 Start LHe transfer at 19.4%
0855 Remove Soudan Cf source from fridge, put back in safe.
0952 Finish LHe transfer at 93.6%
1030 Set thresholds to October 21 values
1036 Start 30min run of background data at -/+10V overshooting +Qbias (side 2) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after. Accidentally overshot wrong side so aborted this series early.
1107 Flash for about 1 minute using control vi
1141 Start 30min run of background data at -/+10V overshooting +Qbias (side 2) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1254 Start 30min run of background data at +/-10V overshooting +Qbias (side 2) to 14V before starting data, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after.
1505 Place Cf source inside shield near detector for Cf runs.
1505 Start 2 cycles of 30min runs of Cf data at -/+4V, FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after. Using Wednesday's thresholds.
1505 Fill LN2 cold trap.
1510 Start 30 cycles of 30min runs of Cf data (alternating between +/-2V and +/-4V), FG=5/2/5, OG=3, 1000 initial randoms, 2000 events/file, 30s flash and 25min cooldown after. Using Wednesday's thresholds.

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