View source for CH PAS He3 Poly Boration Study

='''Experimental Setup'''=

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''Attenuation Measurements Setup'''||
|-
| [[File:PAS Cf-252 Poly Box.jpg|300px|thumb|none| Poly box to contain Cf-252 source for attenuation measurements ]] || [[File:PAS He3 Tube mounting.jpg|400px|thumb|none|He3 tube mounting for attenuation measurements ]] || [[File:PAS_He3_tube_mounting_for_attenuation_measurements.jpg |300px|thumb|none|He3 tube mounted on 2" of virgin poly for attenuation measurements ]]
|-
| [[File:PAS_Cf-252_thermalizing_box_for_attenuation_measurements.jpg|300px|thumb|none| Full poly box with lid pulled back for easy insertion of Cf-252 source ]] || [[File:PAS_Cf-252_in_place_for_attenuation_measurements.jpg|300px|thumb|center|Top down view of Cf-252 source in place, ready to be covered by top sheet of virgin poly ]] || [[File:PAS_Side_view_attenuation_setup.jpg |300px|thumb|none|Full setup with 8.5" of purple borated poly in place ]]
|-
|}




He3 tube is mounted on 2" of virgin poly to put it at rough center of californium source 

Cf252 source is enclosed in thermalizing virgin poly box

He3 tube is 8.5" from outside face of thermalizer

Cf252 is mounted approximately .5" behind thermalizing poly plate

Thermalizing poly plate is 1" thick 

Will upload pictures and attached comments to each picture

='''Measurements'''=

=='''Background Measurements'''==

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Source Out Data'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || No || 32 || 300 || 0.107 || 0.019
|-
|  2  || Detector on poly at +1250V || 255 || No || 44 || 300 || 0.147 || 0.022
|-
|  3  || Detector on poly at +1250V || 255 || No || 55 || 300 || 0.183 || 0.025
|-
|  4  || Detector on poly at +1250V || 255 || No || 34 || 300 || 0.113 || 0.019
|-
|  5  || Detector on poly at +1250V || 255 || No || 20 || 300 || 0.067 || 0.015
|-
|}

=='''Source In'''==

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Source In'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 11255 || 300 ||  || 
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 10996 || 300 ||  || 
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 10750 || 300 ||  || 
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 10815 || 300 ||  || 
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 10696 || 300 ||  || 
|-
|}

=='''Purple Poly without Thermalizer'''==

For some reason, the purple poly bricks are 1 1/8" thick

==='''1" Purple poly, no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 2816 || 300 || 9.39 || 0.177
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 2809 || 300 || 9.36 || 0.177
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 2774 || 300 || 9.25 || 0.176
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 2790 || 300 || 9.30 || 0.176
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 2875 || 300 || 9.58 || 0.179
|-
|}

==='''2 1/8" Purple poly (one brick) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 2118 || 300 || 7.06 || 0.153
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 2012 || 300 || 6.71 || 0.150
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 2092 || 300 || 6.97 || 0.152
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 2025 || 300 || 6.75 || 0.150
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 2092 || 300 || 6.97 || 0.152
|-
|}

==='''3 1/8" Purple poly (one brick & sheet) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 1434 || 300 || 4.78 || 0.126
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 1348 || 300 || 4.49 || 0.122
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 1489 || 300 || 4.96 || 0.129
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 1393 || 300 || 4.64 || 0.124
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 1372 || 300 || 4.57 || 0.124
|-
|}

==='''4 1/4" Purple poly (two bricks) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 1093 || 300 || 3.64 || 0.110
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 1068 || 300 || 3.56 || 0.109
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 1116 || 300 || 3.72 || 0.111
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 1031 || 300 || 3.44 || 0.107
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 1142 || 300 || 3.81 || 0.113
|-
|}

==='''6 3/8" Purple poly (two bricks) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 743 || 300 || 2.48 || 0.091
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 694 || 300 || 2.31 || 0.088
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 756 || 300 || 2.52 || 0.092
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 735 || 300 || 2.45 || 0.090
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 745 || 300 || 2.48 || 0.091
|-
|}

==='''8 1/2" Purple poly (two bricks) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 662 || 300 || 2.21 || 0.086
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 586 || 300 || 1.95 || 0.081
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 613 || 300 || 2.04 || 0.083
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 560 || 300 || 1.87 || 0.079
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 622 || 300 || 2.07 || 0.083
|-
|}

=='''Purple poly with Thermalizer'''==

==='''2 1/8" Purple poly (one brick) with thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Thermalized source'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes, thermalized || 2117 || 300 || 7.06 || 0.153
|-
|  2  || Detector on poly at +1250V || 255 || Yes, thermalized || 1869 || 300 || 6.23 || 0.144
|-
|  3  || Detector on poly at +1250V || 255 || Yes, thermalized || 1836 || 300 || 6.12 || 0.143
|-
|  4  || Detector on poly at +1250V || 255 || Yes, thermalized || 1893 || 300 || 6.31 || 0.145
|-
|  5  || Detector on poly at +1250V || 255 || Yes, thermalized || 1886 || 300 || 6.29 || 0.145
|-
|}

=='''Green Poly without Thermalizer'''==

==='''1" Green poly, no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 2566 || 300 || 8.55 || 0.169
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 2627 || 300 || 8.76 || 0.171
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 2559 || 300 || 8.53 || 0.169
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 2562 || 300 || 8.54 || 0.169
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 2660 || 300 || 8.87 || 0.172
|-
|}

==='''2" Green poly (one brick) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 2176 || 300 || 7.25 || 0.155
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 2070 || 300 || 6.90 || 0.152
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 2055 || 300 || 6.85 || 0.151
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 2131 || 300 || 7.10 || 0.154
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 1957 || 300 || 6.52 || 0.147
|-
|}

==='''3" Green poly (one brick & sheet) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 1345 || 300 || 4.48 || 0.122
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 1335 || 300 || 4.45 || 0.122
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 1295 || 300 || 4.32 || 0.120
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 1384 || 300 || 4.61 || 0.124
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 1297 || 300 || 4.32 || 0.120
|-
|}

==='''4" Green poly (two bricks) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 1056 || 300 || 3.52 || 0.108
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 1085 || 300 || 3.62 || 0.110
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 1151 || 300 || 3.84 || 0.113
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 1064 || 300 || 3.55 || 0.109
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 1059 || 300 || 3.53 || 0.108
|-
|}

==='''6" Green poly (three bricks) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 728 || 300 || 2.43 || 0.090
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 737 || 300 || 2.46 || 0.090
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 759 || 300 || 2.53 || 0.092
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 717 || 300 || 2.39 || 0.089
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 764 || 300 || 2.55 || 0.092
|-
|}

==='''8" Green poly (four bricks) no thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V source in'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 612 || 300 || 2.04 || 0.082
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 606 || 300 || 2.02 || 0.082
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 582 || 300 || 1.94 || 0.080
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 606 || 300 || 2.04 || 0.082
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 597 || 300 || 1.99 || 0.081
|-
|}

=='''Green Poly with Thermalizer'''==

==='''2 1/8" Green poly (one brick) with thermalizer'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Thermalized source'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes, thermalized || 1904 || 300 || 6.35 || 0.145
|-
|  2  || Detector on poly at +1250V || 255 || Yes, thermalized || 1829 || 300 || 6.10 || 0.143
|-
|  3  || Detector on poly at +1250V || 255 || Yes, thermalized || 1851 || 300 || 6.17 || 0.143
|-
|  4  || Detector on poly at +1250V || 255 || Yes, thermalized || 1887 || 300 || 6.29 || 0.145
|-
|  5  || Detector on poly at +1250V || 255 || Yes, thermalized || 1914 || 300 || 6.38 || 0.146
|-
|}

=='''Virgin Poly'''==

==='''1" Virgin Poly (one sheet)'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Source In'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 12743 || 300 || 42.47 || 0.376
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 13109 || 300 || 43.69 || 0.382
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 13052 || 300 || 43.51 || 0.381
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 13136 || 300 || 43.79 || 0.382
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 13064 || 300 || 43.55 || 0.381
|-
|}

==='''2" Virgin Poly (one brick)'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Source In'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 11950 || 300 ||  || 
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 12088 || 300 ||  || 
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 12068 || 300 ||  || 
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 12163 || 300 ||  || 
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 12183 || 300 ||  || 
|-
|}

==='''3" Virgin Poly (one sheet & one brick)'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Source In'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 9185 || 300 ||  || 
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 9091 || 300 ||  || 
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 9040 || 300 ||  || 
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 9211 || 300 ||  || 
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 9035 || 300 ||  || 
|-
|}

==='''4" Virgin Poly (two bricks)'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Source In'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 5924 || 300 ||  || 
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 6232 || 300 ||  || 
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 6006 || 300 ||  || 
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 5978 || 300 ||  || 
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 6222 || 300 ||  || 
|-
|}

==='''6" Virgin Poly (3 bricks)'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Source In'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 2837 || 300 ||  || 
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 2985 || 300 ||  || 
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 3019 || 300 ||  || 
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 2912 || 300 ||  || 
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 3009 || 300 ||  || 
|-
|}

==='''8" Virgin Poly (four bricks)'''===

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Source In'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
|-
|  1  || Detector on poly at +1250V || 255 || Yes || 1974 || 300 ||  || 
|-
|  2  || Detector on poly at +1250V || 255 || Yes || 2006 || 300 ||  || 
|-
|  3  || Detector on poly at +1250V || 255 || Yes || 1975 || 300 ||  || 
|-
|  4  || Detector on poly at +1250V || 255 || Yes || 2069 || 300 ||  || 
|-
|  5  || Detector on poly at +1250V || 255 || Yes || 1990 || 300 ||  || 
|-
|}

='''Results'''=

Posted 6/22/21

[[File:PAS_He3_Poly_Attenuation2.png|300px|thumb|none|Completed attenuation measurements with differing thicknesses of Borated Poly vs unborated poly.]]

The purple and green poly definitely have some boron concentration in them. The fitted curves are the same within uncertainty, so it should not matter which type of borated poly is used in our experimental setup.

6/25/21

Green poly may be marginally better if uncertainty in fitting parameters are discounted. Green poly will be used in experimental set up going forward. Green poly will also be used in BorAl attenuation studies.

='''Go Back'''=

----

[[CH He3 Attenuation Measurements]]

[[PAS Experiment Attenuation Measurements]]

[[PAS_He3_Detector]]

[[PAS_Experiment]]