2012/05/13

0100	Start taking data: three 2-hour long series with D1 +2 V and D2 -2 V; followed by three 2-hour long series with D1 -2 V and D2 +2 V. Flash detector for 6 s in between series (0.6 mA current, 100 μs off, 5 ms on, all LEDs except DIB1 LED2).
1400	DAQ crashed last night at 0348, but managed to collect one complete data set beforehand: 07120513_0059 (D1 +2 V, D2 -2 V).
	Start flashing detector.
1415	Fill N2 cold trap full.
1535	Commence helium transfer. Helium liquid level 3.4%.
1620	Cease helium transfer. Helium liquid level 87.4%.
1715	Stop flashing detector.
1915	Take 0 V data to investigate DIB2 Qo's erratic baseline: 07120513_1911 (1.6384 ms trace length).

Figure 1: Typical pulses from data series 07120513_1911 (1.6384 ms trace length).
DIB1 Qi
DIB1 Qo
DIB2 Qi
DIB2 Qo

1930	Take 0 V data with longer trace length: 07120513_1927 (26.2144 ms trace length).

Figure 2: Typical pulses from data series 07120513_1927 (26.2144 ms trace length).
DIB1 Qi
DIB1 Qo
DIB2 Qi
DIB2 Qo

2140	Perform charge breakdown measurments:

Table 1: Summary of Charge Breakdown Measurements.
	DIB 1	DIB 2
DIB 1 negative	No indication	Hint at -/+7.0 V (Qi)
DIB 1 positive	No indication	Hint at +/-11.0 V (Qi)

2145	Start flashing detector.
2330	Stop flashing detector.
2345	Fill N2 cold trap full.

Quick Analysis of First Data Series 07120513_0059 (DIB1 +2.0 V, DIB2 -2.0 V)

Figure 3: Apparent Cross-Talk between Qi & Qo

Figure 4: Qi vs Qo and Qpart for Sides 1 & 2 after Cross-Talk Correction.

Figure 5: Chi-squared Distributions.

Figure 6: Qsum for Side 1 vs Side 2.

Figure 7: Qsum Distributions and Time Evolution.

Figure 8: Qsum Distributions and Time Evolution for first 30 minutes.