Difference between revisions of "JB Anaysis"

From New IAC Wiki
Jump to navigation Jump to search
 
(35 intermediate revisions by the same user not shown)
Line 1: Line 1:
 +
Go back [[2nCor_44]]
 
=DU runs=
 
=DU runs=
 
==TDC spectrum==
 
==TDC spectrum==
Detector 1
+
[[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)
+
 
[[File:Det4Gammas.png | 500 px]]
+
[[File:Gammas(2).jpg | 950 px]]
  
 
[[2nCor_44#Analysis]]
 
[[2nCor_44#Analysis]]
Line 29: Line 16:
  
 
==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>
+
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)=0.70767 e^{-0.883802 E^'}\sinh \left(\sqrt{E^'}\right)</math>
+
Watt distribution:   
  
[[File:DEt4NeutronEnergy.png| 500 px]]
+
<math>Ce^{-aE^'}\sinh\left(\sqrt{bE^'}\right)=0.708 e^{-0.884 E^'}\sinh \left(\sqrt{E^'}\right)</math>
  
[[File:EngvsWqatt.jpg | 700 px]]
+
[[File:Watt.jpg|1000 px]]
[[File:WattVsEng.png| 500 px]]
 
  
 
==Second Hit==
 
==Second Hit==
 
Odd TDC spectrum in the second hit:
 
Odd TDC spectrum in the second hit:
  
[[File:SecondHit1.png|500 px]]
+
[[File:Snip20150815 28.png | 1110 px]]
  
 
Applying cuts based on TDC difference could help:
 
Applying cuts based on TDC difference could help:
  
[[File:SecondHit.png|500 px]]
+
[[File:SecondHit.png|1000 px]]
  
 
==Opening angles==
 
==Opening angles==
 
Uncorrelated distribution from detectors 1-4:
 
Uncorrelated distribution from detectors 1-4:
  
[[File:Snip20150729 3.png|500 px]]
+
[[File:Snip20150729 3.png|750 px]]
  
 
Analyzing 5653446 pulses from DU runs, I was able to find 349 two-neutron events in detectors 1-4.
 
Analyzing 5653446 pulses from DU runs, I was able to find 349 two-neutron events in detectors 1-4.
[[File:CorrOverUncorR.png| 500 px]]
+
 
 +
[[File:CorrOverUncorR.png| 750 px]]
  
 
As a test I did the same for gamma events:
 
As a test I did the same for gamma events:
  
[[File:Gammacorrelation.png| 500 px]]
+
[[File:Snip20150815 29.png| 500 px]]
 +
 
 +
 
 +
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