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2013/07/05

1020 Filled LN2 cold trap.
1044 Commence data acquisition: flash for 1 hour followed by 2 hours cool-down; 3 series at +/-5 V bias followed by 3 series at -/+5 V; OR trigger on Qi and Qo channels; DIB 1 trigger at 32 ADC bins, DIB 2 trigger at 28 ADC bins; 20/0.1/20 minutes acquisition/flash/cool-down cycle.
1745 Began LHe transfer (4.7%)
1820 Changed LHe dewars (51.1%)
1900 Began LHe transfer (50.7%)
1916 Commence data acquisition: flash for 1 hour followed by 2 hours cool-down; 3 series at +/-6 V bias followed by 3 series at -/+6 V, repeat for 8V, 10V, 12V (+/- and then -/+ for each bias); OR trigger on Qi and Qo channels; DIB 1 trigger at 32 ADC bins, DIB 2 trigger at 28 ADC bins; 20/0.1/20 minutes acquisition/flash/cool-down cycle.
1925 Finished LHe transfer (70.5%)
1934 Filled LN2 cold trap.

+/- 5V

Fig. 1: Charge energy spectrum for +/-5V bias using threshold, Qpartition, and chi squared cuts.

-/+ 5V

Fig. 2: Charge energy spectrum for -/+5V bias using threshold, Qpartition, and chi squared cuts.

+/- 6V

Fig. 3: Charge energy spectrum for +/-6V bias using threshold, Qpartition, and chi squared cuts.
Note the strange double peaks for Am-241 on both sides of the data (binning was changed from 500 to 400 on -/+6V to emphasize this effect on side 1)

-/+ 6V

Fig. 4: Charge energy spectrum for -/+6V bias using threshold, Qpartition, and chi squared cuts.

+/- 8V

Fig. 5: Charge energy spectrum for +/-8V bias using threshold, Qpartition, and chi squared cuts.

-/+ 8V

Fig. 6: Charge energy spectrum for -/+8V bias using threshold, Qpartition, and chi squared cuts.