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2011/05/23

1015 Filled LN2 cold trap.
1420 Stop taking data. Data series collected overnight: 07110522_2054; 07110522_2209; 07110522_2324; 07110523_0039; 07110523_0154; 07110523_0310; 07110523_0425; 07110523_0540; 07110523_0655; 07110523_0810; 07110523_0926; 07110523_1041; 07110523_1156; 07110523_1311.
1440 Start LHe transfer. Helium liquid level 4.2%.
1515 Stop LHe transfer. Helium liquid level 62.3%.

Debugging the New DAQ

Figure 1: Event rate as a function of Time for iZIP data format files.
Figure 2: Event rate as a function of time for oZIP data format files.

Looking for Neutralisation

Figure 3: First data series 07110522_2054.
Figure 4: Second data series 07110522_2209.
Figure 5: Third data series 07110522_2324.
Figure 6: Fourth data series 07110523_0039.
Figure 7: Fifth data series 07110523_0154.
Figure 8: Sixth data series 07110523_0310.
Figure 9: Seventh data series 07110523_0425.
Figure 10: Eighth data series 07110523_0540.
Figure 11: Ninth data series 07110523_0655.
Figure 12: Tenth data series 07110523_0810.
Figure 13: Eleventh data series 07110523_0926.
Figure 14: Twelfth data series 07110523_1041.
Figure 15: Thirteenth data series 07110523_1156.
Figure 16: Final data series 07110523_1311.

This data set

Mean = 0.01678 ± 0.00004 (0.2%)
Standard deviation = 0.00016 (1.0% of mean)

Combined with previous oZIP data set 07110519_xxxx

Mean = 0.01680 ± 0.00004 (0.2%)
Standard deviation = 0.000016 (1.0% of mean)