PMT spectra Comparison by Time

Weighted by Time

All data files have been previously analyzed here (background), here (Barium-133), and here (Americium-241). PMT 14 was run with a bias voltage of -1100 V with scintillator 1-66-? and varying sources with a copper collimator attached to plastic in the darkroom. The connection to the DAQ board was modified with varying attenuators. Each event was self-triggered with a varying trigger threshold for a total of 100k events.

Table 1: Data files used
Run	Source	Scintillator	Total time (s)	Data file
1	None	None	10813	130920_pmt14_background_1100v_x10_no-scint.dat
2	None	Yes	5868	130911_pmt14_background_8280_1100v_x10.dat
3	Am-241	None	34456	130921_pmt14_am241_8280_1100v_x10_no-scint.dat
4	Am-241	Yes	5144	130909_pmt14_am241_8280_1100v_x10.dat
5	Ba-133	Yes	4643	130906_pmt14_ba133_8280_1100v_x10.dat

Americium-241

Figure 1: Comparison between backgrounds and source for Americium-241

Each histogram in Figure 1 is weighted by frequency (100k events / total time) such that the Americium-241 run with scintillator has a weight of 1. The cuts for saturation and baseline standard deviation have also been removed.

Barium-133

Figure 2: Comparison between backgrounds and source for Americium-241

Each histogram in Figure 2 is weighted by frequency (100k events / total time) such that the Barium-133 run with scintillator has a weight of 1.

Cut by Time

All data files have been previously analyzed here (background), here (Barium-133), here (Americium-241), and here (Cesium-137). PMT 14 was run with a bias voltage of -1100 V with scintillator 1-66-? and varying sources with a copper collimator attached to plastic in the darkroom. The connection to the DAQ board was modified with varying attenuators. Each event was self-triggered with a varying trigger threshold for a total of 100k events.

Table 1: Data files used
Run	Source	Scintillator	Attenuation	Total time (s)	Data file
1	None	None	None	10813	130920_pmt14_background_1100v_x10_no-scint.dat
2	None	Yes	None	5868	130911_pmt14_background_8280_1100v_x10.dat
3	None	Yes	x10	12120	130917_pmt14_background_8230_1100v_x10_x10atten_1.dat
4	Am-241	None	None	34456	130921_pmt14_am241_8280_1100v_x10_no-scint.dat
5	Am-241	Yes	None	5144	130909_pmt14_am241_8280_1100v_x10.dat
6	Am-241	Yes	x10	10323	130910_pmt14_am241_8230_1100v_x10_x10atten.dat
7	Ba-133	Yes	None	4643	130906_pmt14_ba133_8280_1100v_x10.dat
8	Ce-137	Yes	x10	4434	130910_pmt_cs137_8230_1100v)_x10_x10atten.dat

Americium-241

Figure 3: Americium-241 Comparison cut by Time only

Each histogram in Figure 3 is cut by time such that the histogram has the number of events that were taken in the amount of time it took to get 100k Americium-241 events. The cuts for saturation and baseline standard deviation have also been removed.

Figure 4: Americium-241 Comparison cut by Time, and Saturation

Each histogram in Figure 4 is cut by time such that the histogram has the number of events that were taken in the amount of time it took to get 100k Americium-241 events. Each histogram is also cut at the saturation limit of an amplitude of 4500 bins. The cuts for baseline standard deviation have also been removed.

Figure 5: Americium-241 Comparison cut by Time, Baseline standard deviation, and Saturation

Each histogram in Figure 5 is cut by time such that the histogram has the number of events that were taken in the amount of time it took to get 100k Americium-241 events. Each histogram is also cut at the saturation limit of an amplitude of 4500 bins. All events with a baseline standard deviation greater than 7 have also been cut.

Barium-133

Figure 6: Barium-133 Comparison cut by Time, Baseline standard deviation, and Saturation

Each histogram in Figure 6 is cut by time such that the histogram has the number of events that were taken in the amount of time it took to get 100k Barium-133 events. Each histogram is also cut at the saturation limit of an amplitude of 4500 bins. All events with a baseline standard deviation greater than 7 have also been cut.

Cesium-137

Figure 7: Cesium-137 Comparison cut by Time, Baseline standard deviation, and Saturation

Each histogram in Figure 7 is cut by time such that the histogram has the number of events that were taken in the amount of time it took to get 100k Cesium-137 events. Each histogram is also cut at the saturation limit of an amplitude of 4500 bins. All events with a baseline standard deviation greater than 7 have also been cut.