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2011/03/02

1120 Fill N2 cold trap full.
1810 Received new version of DAQ from Jeter this morning. There is some improvement, but it still locks up, albeit at a higher event number. Perhaps we can take some data.
Data series: 07110302_1652, 10 files, charge pulses only, bias -3 V, trigger threshold 24 ADC bins (1.5 mV).
2156 Took charge data 07110302_1652 and found the 60keV peak is not as prominent as in Run 9. Suspect the neutralization was lost during the days of -3V bias. Try to flash the detector for 1 hour and check the spectrum again.
Found Detector_control vi is in Labview v10. Replace DCRC.llb with the 20101121 version and make the 20110302_2 version.
2205 Flash G8 on DCRC33, LED1, -0.6mA, 100us ON, 2500us OFF. Temperature change 61.8mK → 214mK.
2208 Flash G9 on DCRC30, LED1, -0.6mA, 100us ON, 2500us OFF. Temperature change 214mK → 460mK.
2335 Stop flashing LEDs. Wait for tower to cool.