View source for CH He3 Attenuation Measurements: 3 Different Cf252 Sources

='''Results'''=

<gallery heights="300" widths="350" class="center">
CH_High_And_Unknown_Activity_Source.png|<span style="color:#FF0000">'''Red:'''</span> Log plot of scalar measurements using the high activity source with <small><math>Ae^Bx+C</math></small> fit. <span style="color:#0000ff">'''Blue:'''</span> Log plot of scalar measurements using the undetermined activity source with <small><math>Ae^Bx+C</math></small>

CH NoPolyScaled Borated Poly Atten He3 500uCi ADC 05192022.png|Energy spectrum of He3 tube using peak sensing ADC for the varying thicknesses of borated polyethylene. Note that the 0" of poly (open source) is scaled by <small><math>\frac{1}{3}</math></small>. 

PS_Sim_He3_Energy_Spectrum_Cf252_05112022.png|Simulated energy spectrum of He3 tube in borated poly box.




</gallery>

='''Attenuation Experiment using New Modules in Electronics Chain and Inside Borated Poly Box'''=

=='''Electronics Chain (Poly Box)'''==

Include schematic of electronics chain 

==='''Components'''===

Each component of electronics chain with make/model, function, and brief description of why it's present

'''Ortec 142PC Pre-amp'''

Pre-amp for the He3 tube

'''CAEN Quad Linear Fan In - Fan Out Model N25 Tag #15687'''

* The fan in/out is used to duplicate the pulse to run the spec amp and watch the signal on the scope for any anomalies. 

* The fan in/out is also used to invert the signal from the spec amp to send a negative pulse to the discriminator to trigger the scalar.

'''Ortec Spec Amp Model 672'''

* 10x Course Gain

* 1x Fine Gain

* 0.5us Shaping Time

* Uni Shaping: Gaussian

* Input: Norm (+)

* Output: Unipolar

* Manual Pole Zero adjustment

'''LeCroy Discriminator Model 821 Serial #B16303'''

* Variable threshold

* Pulse width as measured on scope: ~43ns

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

{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
|-
| '''1250V Background Measurements'''||
|-
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on 3D printed stands at +1250V || 255 || No || 33 || 100 
|-
|  2  || Detector on 3D printed stands at +1250V || 255 || No || 24 || 100  
|-
|  3  || Detector on 3D printed stands at +1250V || 255 || No || 30 || 100 
|-
|  4  || Detector on 3D printed stands at +1250V || 255 || No || 26 || 100 
|-
|  5  || Detector on 3D printed stands at +1250V || 255 || No || 19 || 100 
|-
|}

=='''High Activity Source Poly Box Attenuation Measurements'''==

'''472<small><math>\mu</math></small>Ci at time of measurement.''' 

==='''Open Source'''===

{| 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 Source || Counts || Run Time (Sec)
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 34456 || 10 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 34920 || 10 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 34422 || 10  
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 34007 || 10 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 34420 || 10 
|-
|}

==='''2" Green poly (one brick) in Box'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 7538 || 10 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 7515 || 10  
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 7613 || 10 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 7566 || 10  
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 7510 || 10 
|-
|}

==='''4" Green poly (two bricks) in Box'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 4758 || 10 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 4798 || 10  
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 4722 || 10 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 4859 || 10  
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 4672 || 10 
|-
|}

==='''6" Green poly (three bricks) in Box'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 3664 || 10  
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 3627 || 10 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 3699 || 10 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 3688 || 10  
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 3500 || 10 
|-
|}

==='''8" Green poly (four bricks) in Box'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 3140 || 10 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 3064 || 10  
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 3030 || 10  
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 3095 || 10 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 3113 || 10  
|-
|}

=='''Undetermined Activity Source Poly Box Attenuation Measurements'''==

==='''Open Source'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 3873 || 100
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 3909 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 3859 || 100 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 3944 || 100 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 3812 || 100 
|-
|}

==='''2" Green poly (one brick) in Box'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 764 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 819 || 100  
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 818 || 100  
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 815 || 100  
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 913 || 100  
|-
|}

==='''4" Green poly (two bricks) in Box'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 486 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 509 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 531 || 100 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 544 || 100  
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 530 || 100 
|-
|}

==='''6" Green poly (three bricks) in Box'''===

{| 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 Source || Counts || Run Time (Sec)
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 415 || 100
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 373 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 380 || 100  
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 397 || 100 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 419 || 100 
|-
|}

==='''8" Green poly (four bricks) in Box'''===

{| 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 Source || Counts || Run Time (Sec)
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 371 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 396 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 351 || 100 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 366 || 100 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 394 || 100 
|-
|}

==='''Lead Attenuation Measurements'''===

 The purpose of these measurements was to determine if photon build up in the He3 tube was a significant effect to consider when trying to determine the activity of the Unknown Source 

4/5/22

===='''Lead Open Source'''====

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 3873 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 3909 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 3859 || 100  
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 3944 || 100  
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 3812 || 100  
|-
|}

===='''1" Lead'''====

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 4152 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 3945 || 100  
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 4141 || 100  
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 3974 || 100 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 4154 || 100  
|-
|}

===='''2" Lead'''====

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 3509 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 3472 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 3387 || 100 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 3488 || 100
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 3463 || 100  
|-
|}

===='''3" Lead'''====

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 2995 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 2921 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 2956 || 100 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 2916 || 100  
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 3015 || 100 
|-
|}

===='''4" Lead'''====

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 2630 || 100  
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 2601 || 100  
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 2558 || 100 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 2629 || 100 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 2650 || 100  
|-
|}

=='''Lowest Activity Source Poly Box Attenuation Measurements'''==

'''Approximately 1.15<small><math>\mu</math></small>Ci at time of measurement, according to ISU Radiation Safety''' 

==='''Open Source'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 31 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 32 || 100  
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 26 || 100  
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 23 || 100  
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 29 || 100  
|-
|}

==='''2" Green poly (one brick) in Box'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 18 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 27 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 21 || 100 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 21 || 100 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 22 || 100 
|-
|}

==='''4" Green poly (two bricks) in Box'''===
{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 31 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 18 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 19 || 100  
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 31 || 100  
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 30 || 100 
|-
|}

==='''6" Green poly (three bricks) in Box'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 35 || 100 
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 24 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 23 || 100 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 21 || 100 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 22 || 100 
|-
|}

==='''8" Green poly (four bricks) in Box'''===

{| 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 Source || Counts || Run Time (Sec) 
|-
|  1  || Detector on poly at +1250V || 80 || Yes || 20 || 100
|-
|  2  || Detector on poly at +1250V || 80 || Yes || 28 || 100 
|-
|  3  || Detector on poly at +1250V || 80 || Yes || 29 || 100 
|-
|  4  || Detector on poly at +1250V || 80 || Yes || 16 || 100 
|-
|  5  || Detector on poly at +1250V || 80 || Yes || 22 || 100 
|-
|}

='''Previous Page'''=

[[CaGaS Phase II]]