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]]
 
 
 
Detector 2
 
 
 
[[File:Det2tdc.png| 500 px]]
 
 
 
Detector 3
 
 
 
[[File:Det3DTC.png| 500 px]]
 
 
 
Detector 4
 
 
 
[[File:Det4TDc.png|500 px]]
 
  
 
==Target in vs. target out==
 
==Target in vs. target out==
 
Gamma peak is revealed by comparing target in and target out runs.   
 
Gamma peak is revealed by comparing target in and target out runs.   
(open the file to see it clearly)
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[[File:Det4Gammas.png | 500 px]]
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[[File:Gammas(2).jpg | 950 px]]
  
 
[[2nCor_44#Analysis]]
 
[[2nCor_44#Analysis]]
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==Energy==
 
==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>
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Neutron Energy:   
  
Watt distribution:  <math>Ce^{-aE^'}sinh\left(\sqrt{bE^'}\right)</math>
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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>
  
[[File:DEt4NeutronEnergy.png| 500 px]]
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Watt distribution:  
  
[[File:EngvsWqatt.jpg | 700 px]]
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<math>Ce^{-aE^'}\sinh\left(\sqrt{bE^'}\right)=0.708 e^{-0.884 E^'}\sinh \left(\sqrt{E^'}\right)</math>
[[File:WattVsEng.png| 500 px]]
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[[File:Watt.jpg|1000 px]]
  
 
==Second Hit==
 
==Second Hit==
[[File:SecondHit1.png|500 px]]
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Odd TDC spectrum in the second hit:
[[File:SecondHit.png|500 px]]
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[[File:Snip20150815 28.png | 1110 px]]
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Applying cuts based on TDC difference could help:
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[[File:SecondHit.png|1000 px]]
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==Opening angles==
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Uncorrelated distribution from detectors 1-4:
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[[File:Snip20150729 3.png|750 px]]
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Analyzing 5653446 pulses from DU runs, I was able to find 349 two-neutron events in detectors 1-4.
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[[File:CorrOverUncorR.png| 750 px]]
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As a test I did the same for gamma events:
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[[File:Snip20150815 29.png| 500 px]]
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Go back [[2nCor_44]]

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