Difference between revisions of "JB Anaysis"

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Go back [[2nCor_44]]
 
=DU runs=
 
=DU runs=
==Neutron-Gamma Seperation==
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==TDC spectrum==
Detector 1
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[[DTC]]
  
[[File:Det1TDC.png| 500 px]]
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==Target in vs. target out==
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Gamma peak is revealed by comparing target in and target out runs. 
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[[File:Gammas(2).jpg | 950 px]]
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[[2nCor_44#Analysis]]
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==ToF==
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<math>Neutron TOF=\frac{PMT_{top}+PMT_{bottom}}{2}-t_{\gamma peak}+\gamma_{TOF}</math>
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[[File:Det4ToF.png| 500 px]]
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==Energy==
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Neutron Energy:   
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<math>\frac{1}{2}m_{n}\left(\frac{in}{ns}\right)^2=3.372\left(\frac{42}{t}\right)^2 MeV</math>
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Watt distribution: 
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<math>Ce^{-aE^'}\sinh\left(\sqrt{bE^'}\right)=0.708 e^{-0.884 E^'}\sinh \left(\sqrt{E^'}\right)</math>
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[[File:Watt.jpg|1000 px]]
  
Detector 2
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==Second Hit==
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Odd TDC spectrum in the second hit:
  
[[File:Det2tdc.png| 500 px]]
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[[File:Snip20150815 28.png | 1110 px]]
  
Detector 3
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Applying cuts based on TDC difference could help:
  
[[File:Det3DTC.png| 500 px]]
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[[File:SecondHit.png|1000 px]]
  
Detector 4
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==Opening angles==
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Uncorrelated distribution from detectors 1-4:
  
[[File:Det4TDc.png|500 px]]
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[[File:Snip20150729 3.png|750 px]]
  
==Target in vs. target out==
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Analyzing 5653446 pulses from DU runs, I was able to find 349 two-neutron events in detectors 1-4.
Gamma peak is revealed by comparing target in and target out runs
 
(open the file to see it clearly)
 
[[File:Det4Gammas.png | 500 px]]
 
  
[[2nCor_44#Analysis]]
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[[File:CorrOverUncorR.png| 750 px]]
  
==ToF==
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As a test I did the same for gamma events:
<math>Neutron TOF=\frac{PMT_{top}+PMT_{bottom}}{2}-t_{\gamma peak}+\gamma_{TOF}</math>
 
[[File:Det4ToF.png| 500 px]]
 
  
==Energy==
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[[File:Snip20150815 29.png| 500 px]]
<math>\frac{1}{2}m_{n}\left(\frac{in}{ns}\right)^2=3.372 MeV</math>
 
  
[[File:DEt4NeutronEnergy.png| 500 px]]
 
  
Watt distribution:  <math>Ce^{-aE^'}sinh\left(\sqrt{bE^'}\right)</math>
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[[File:EngvsWqatt.jpg | 700 px]]
 
[[File:WattVsEng.png| 700 px]]
 

Latest revision as of 23:10, 19 August 2015

Go back 2nCor_44

DU runs

TDC spectrum

DTC

Target in vs. target out

Gamma peak is revealed by comparing target in and target out runs.

Gammas(2).jpg

2nCor_44#Analysis

ToF

[math]Neutron TOF=\frac{PMT_{top}+PMT_{bottom}}{2}-t_{\gamma peak}+\gamma_{TOF}[/math] Det4ToF.png

Energy

Neutron Energy:

[math]\frac{1}{2}m_{n}\left(\frac{in}{ns}\right)^2=3.372\left(\frac{42}{t}\right)^2 MeV[/math]

Watt distribution:

[math]Ce^{-aE^'}\sinh\left(\sqrt{bE^'}\right)=0.708 e^{-0.884 E^'}\sinh \left(\sqrt{E^'}\right)[/math]

Watt.jpg

Second Hit

Odd TDC spectrum in the second hit:

Snip20150815 28.png

Applying cuts based on TDC difference could help:

SecondHit.png

Opening angles

Uncorrelated distribution from detectors 1-4:

Snip20150729 3.png

Analyzing 5653446 pulses from DU runs, I was able to find 349 two-neutron events in detectors 1-4.

CorrOverUncorR.png

As a test I did the same for gamma events:

Snip20150815 29.png


Go back 2nCor_44