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2011/10/27

0920 Found connection to DCRC30 was reset and a DAQ error occurred. It happened at about 02:21 this morning. Detector was biased since then.
0930 Take series 07111027_0930 to flash the detector. +2V data will start after flashing.
0944 Filled N2 cold trap.
1610 Interrupt data acquisition.
Commence helium transfer. Helium liquid level 5.2%.
1650 Helium transfer complete. Helium liquid level 94.3%.
1720 DAQ playing up - perhaps pausing it was not a good idea. Cycle power and reset timing link - pulses look much better. Flash for approximately a minute and leave to cool down before resuming data acquisition.

Preliminary Analysis

Qn dominant channel & chi^2 cuts used in 'Qn as a function of time' plots.

-4 V bias across all electrodes

Figure 1: Data series 07111026_1111.
Figure 2: Data series 07111026_1231.
Figure 3: Data series 07111026_1352.

+4 V bias across all electrodes

Figure 4: Data series 07111026_1517.
Figure 5: Data series 07111026_1637.
Figure 6: Data series 07111026_1758.