LB SageBrushWork PostDefense

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Mass Information

The target masses are as follows

50% Se/Sage Sample

Selenium Target (50% Sagebrush Se Mix) Mass (g)
Outer Front Ni Foil 0.6948
Se Mass 0.51
Outer Se Mass 0.1
Sagebrush Leaves Mass 0.4969



10% Sample

Selenium Target (10% Sagebrush Se Mix) Mass (g)
Outer Front Ni Foil 0.2783
Se Mass 0.0523
Outer Se Mass 0.0971
Sagebrush Leaves Mass 0.5111


0.1% Se/Sage Sample

Selenium Target (0.1% Sagebrush Se Mix) Mass (g)
Outer Front Ni Foil 1.1437
Se Mass 0.0559
Outer Se Mass 0.1118
Sagebrush Leaves Mass 50.1080



0.04% Sample

Selenium Target (0.04% Sagebrush Se Mix) Mass (g)
Outer Front Ni Foil 0.5447
Se Mass 0.0020
Outer Se Mass 0.0992
Sagebrush Leaves Mass 4.9326


Time Cuts

The first step in the PAA process is to identify the time cuts used for the split run. This must be done for all samples (50%,10%,0.1%, and 0.04%).

50% Sage/Se Mixture Time Cuts

The 50% Se/Sage mixture was measure on Detector B (unshielded, so watch the SNR) on 5/24/17 for a total of 2130.540 seconds. The outer pure witness Se was measure first, and sub-run was roughly 300 seconds for the samples of interest, and 60 seconds for the Co-60 flag. The root command used to draw the timing information was

TTree* tree = MPA;

MPA->Draw("evt.Chan:evt.Sec>>hist2","evt.ADCid == 1");

which produced the histogram below

LB 50 Percent SeSage TimeCutInfo.png

This seems a little sloppy, lets try a 1D histogram instead to see if the cuts are more clear

ROOT Command: MPA->Draw("evt.Sec>>hist","ADCid==1","");

This produced the histogram below

LB 50 Percent SeSage TimeCutInfo 1DHistogram.png

This seems much cleaner and clearly shows the time cuts

The time cuts are

0-300 (Pure Se)

375-440 (Co-60)

450-700 (Mixture)

715-780 (Co-60)

800-1010 (Pure Se)

1055-1150 (Co-60)

1160-1420 (Mixture)

1425-1495 (Co-60)

1500-1800 (Pure Se)

1810-1870 (Co-60)

1880-2100 (Mixture)

10% Sage/Se Mixture Time Cuts

The 10% Se/Sage mixture was measured on Detector A (shielded) on 5/25/17 for a total of 5136.343 seconds. The mixture was measured first, and a sub-run was roughly 300 seconds for the Se samples and 60 seconds for the Co-60 flag. The root commands used were

TTree* tree = MPA;

MPA->Draw("evt.Chan:evt.Sec>>hist2","evt.ADCid == 0");

10Percent SeSage TimingCutInfo.png

10Percent SeSage TimingCutInfo 1DHistogram.png

The time cut information is as follows

0-300 (Mixture)

300-360 (Co-60)

400-640 ( Pure Se)

680-710 (Co-60)

730-1020 (Mixture)

1030-1080 (Co-60)

1100-1360 ( Pure Se)

1400-1440 (Co-60)

1480-1775 (Mixture)

1800-1840 (Co-60)

1875-2150 (Pure Se)

2190-2220 (Co-60)

2250-2550 (Mixture)

2590-2620 (Co-60)

2650-2930 (Pure Se)

2950-3000 (Co-60)

3050-3300 (Mixture)

3390-3350 (Co-60)

3400-3690 (Pure Se)

3700-3750 (Co-60)

3775-4050 (Mixture)

4060-4100 (Co-60)

4120-4400 (Pure Se)

4420-4470 (Co-60)

4480-4770 (Mixture)

4790-4820 (Co-60)

4840-5130 (Pure Se)

0.1% Sage/Se Mixture Time Cuts

The 0.1% Se/Sage mixture was measured on Detector A (shielded) on 5/24/17 for a total of 2130.540 seconds. The mixture was measured first, and a sub-run was roughly 300 seconds for the Se samples and 60 seconds for the Co-60 flag. The root commands used were

TTree* tree = MPA;

MPA->Draw("evt.Chan:evt.Sec>>hist2","evt.ADCid == 0");

which produced the histogram below

0 1 Percent SeSage TimeCutInfo.png

This seems a little sloppy, so let's repeat the procedure for the 50% sample

ROOT Command:ROOT Command: MPA->Draw("evt.Sec>>hist","ADCid==0","");

This produced the histogram below

0 1 Percent SeSage TimeCutInfo 1DHistogram.png

This is again much better than the 2D histogram.

The time cuts are

0-300 (Mixture)

306-340 (Co-60)

376-640 (Pure Se)

650-720 (Co-60)

730-1010 (Mixture)

1020-1050 (Co-60)

1100-1350 (Pure Se)

1400-1460 (Co-60)

1470-1730 (Mixture)

1735-1800 (Co-60)

1804-2140 (Pure Se)

The histogram for the time cuts of the second run is shown below

0 1 Percent SeSage TimeCutInfo 1DHistogram Run2.png

The time cuts are

0-240 (Outer Se)

245-300 (Co-60)

305-820 (Mixture)

0.04% Sample Time Cuts

The 0.04% Se/Sage mixture was measured on Detector A (shielded) on 5/25/17 for a total of 1711.891 seconds. The mixture was measured first, and a sub-run was roughly 300 seconds for the Se samples and 60 seconds for the Co-60 flag. The root commands used were

TTree* tree = MPA;

MPA->Draw("evt.Sec>>hist2","evt.ADCid == 0");


The histogram representing the time cuts for the first run are shown below

0 04Percent SeSage TimeCuts 1DHistogram.png

The time cuts for this run are

0-290 (Mixture)

295-360 (Co-60)

370-684 (Pure Se)

The histogram representing the time cuts for the second run are shown below

0 04Percent SeSage TimeCuts 1DHistogram Run2.png

The time cuts for this run are

0-300 (Mixture)

305-355 (Co-60)

360-650 (Pure Se)

660-735 (Co-60)

740-1020 (Mixture)

Gamma Spectrum Analysis

50% Sample Analysis

Below is the analysis table for the 50% Se/Sage mixture. The 103 keV line of Se-81m corresponds to a channel # of 130. Due to the sloppiness of the spectrum, I will use a linear + Gaussian fitting function and restrict my analysis to 6 channels because there are other energy lines nearby. Below is a sample spectrum for an idea of the resolution of Detector B for this measurement

LB 50Percent SeSage SampleSpectrum.png


0<t<300
Thin Window Histogram
Signal in Thin Window
Integrated Background
Signal - Background
Runtime (s)
Rate (Hz)
Integral Decay Correction (Hz)
Dead Time (%)
Dead Time Corrected Signal (Hz)
.Dat File Entry For HL Plot

10% Sample Analysis

Below is the analysis table for the 10% Se/Sage mixture. The 103 keV line of Se-81m corresponds to a channel # of 113


0<t<300 730<t<1020 1480<t<1775 2250<t<2550 3050<t<3300 3775<t<4050 4480<t<4770
Thin Window Histogram 10Percent SeSageMix 0 t 300Sec 10Chan Se81m.png 10Percent SeSageMix 730 t 1020Sec 10Chan Se81m.png 10Percent SeSageMix 1480 t 1775Sec 10Chan Se81m.png 10Percent SeSageMix 2250 t 2550Sec 10Chan Se81m.png 10Percent SeSageMix 3050 t 3300Sec 10Chan Se81m.png 10Percent SeSageMix 3775 t 4050Sec 10Chan Se81m.png 10Percent SeSageMix 4480 t 4770Sec 10Chan Se81m.png
Signal in Thin Window [math] 6.019 \times 10^5 \pm 775.82[/math] [math] 4.852 \times 10^5 \pm 696.56 [/math] [math] 4.161 \times 10^5 \pm 645.06 [/math] [math] 3.667 \times 10^5 \pm 605.56 [/math] [math] 2.645 \times 10^5 \pm 514.30 [/math] [math] 2.451 \times 10^5 \pm 495.08 [/math] [math] 2.344 \times 10^5 \pm 484.15 [/math]
Integrated Background [math] 2.956 \times 10^5 \pm 885.1 [/math] [math] 2.074 \times 10^5 \pm 728.7 [/math] [math] 1.668 \times 10^5 \pm 653.0 [/math] [math] 1.47 \times 10^5 \pm 606.0 [/math] [math] 1.115 \times 10^5 \pm 528.6 [/math] [math] 1.055 \times 10^5 \pm 418.7 [/math] [math] 9.935 \times 10^4 \pm 496 [/math]
Signal - Background [math] 3.063 \times 10^5 \pm 1177.01 [/math] [math] 2.778 \times 10^5 \pm 1008.07 [/math] [math] 2.493 \times 10^5 \pm 917.88[/math] [math] 2.197 \times 10^5 \pm 856.70 [/math] [math] 1.53 \times 10^5 \pm 737.51 [/math] [math] 1.396 \times 10^5 \pm 648.39 [/math] [math] 1.35050 \times 10^5 \pm 693.12 [/math]
Runtime (s) 300 290 295 300 250 275 290
Rate (Hz) [math] 1021 \pm 3.92 [/math] [math] 957.93 \pm 3.48 [/math] [math] 845.08 \pm 3.11 [/math] [math] 732.33 \pm 2.86 [/math] [math] 612 \pm 2.95 [/math] [math] 507.64 \pm 2.36 [/math] [math] 465.69 \pm 2.39 [/math]
Integral Decay Correction (Hz) [math] 1052.2 \pm 4.04 [/math] [math] 986.23 \pm 3.58 [/math] [math] 870.47 \pm 3.20 [/math] [math] 754.71 \pm 2.95 [/math] [math] 627.56 \pm 3.03 [/math] [math] 521.85 \pm 2.43 [/math] [math] 479.44 \pm 2.46 [/math]
Dead Time (%) 5.06 +/- 0.39 3.06 +/- 0.30 2.53 +/- 0.31 2.26 +/- 0.33 1.92 +/- 0.26 1.65 +/- 0.34 1.55 +/- 0.18
Dead Time Corrected Signal (Hz)
.Dat File Entry For HL Plot

0.1% Sample Analysis

Below is the analysis table for the 0.1% Mixture, the 103 keV line for Se-81m corresponds to a channel # of 113.


0<t<300 730<t<1010 1470<t<1730 305<t<820 (Run 2)
Thin Window Histogram 0 1PercentSeSageMix 0 t 300Sec.png 0 1PercentSeSageMix 730 t 1010Sec.png 0 1PercentSeSageMix 1470 t 1730Sec.png 0 1PercentSeSageMix 305 t 820Sec Run2.png
Signal in Thin Window No Signal Visible No Signal Visible No Signal Visible Possible Signal Visible?
Integrated Background - - - -
Signal - Background - - - -
Runtime (s) 300 280 260 515
Rate (Hz) - - - -
Integral Decay Correction (Hz) - - - -
Dead Time (%) - - - -
Dead Time Corrected Signal (Hz) - - - -
.Dat File Entry For HL Plot - - - -

0.04% Sample Analysis

0<t<290 0<t<300 (Run 2) 740<t<1020 (Run 2)
Thin Window Histogram 0 04Percent SeSage Mix 0 t 290Sec Run1.png 0 04Percent SeSage Mix 0 t 300Sec Run2.png 0 04Percent SeSage Mix 740 t 1020Sec Run2.png
Signal in Thin Window No Signal Visible No Signal Visible No Signal Visible
Integrated Background - - - -
Signal - Background - - - -
Runtime (s) 290 300 280
Rate (Hz) - - - -
Integral Decay Correction (Hz) - - - -
Dead Time (%) - - - -
Dead Time Corrected Signal (Hz) - - - -
.Dat File Entry For HL Plot - - - -
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