JB Anaysis: Difference between revisions
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=DU runs= | =DU runs= | ||
==TDC spectrum== | ==TDC spectrum== | ||
[[DTC]] | |||
[[ | |||
==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. | ||
[[File: | [[File:Gammas(2).jpg | 950 px]] | ||
[[2nCor_44#Analysis]] | [[2nCor_44#Analysis]] | ||
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==Energy== | ==Energy== | ||
Neutron 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> | <math>\frac{1}{2}m_{n}\left(\frac{in}{ns}\right)^2=3.372\left(\frac{42}{t}\right)^2 MeV</math> | ||
Watt distribution: | Watt distribution: | ||
<math>Ce^{-aE^'}\sinh\left(\sqrt{bE^'}\right)=0.708 e^{-0.884 E^'}\sinh \left(\sqrt{E^'}\right)</math> | |||
[[File: | [[File:Watt.jpg|1000 px]] | ||
==Second Hit== | ==Second Hit== | ||
Odd TDC spectrum in the second hit: | Odd TDC spectrum in the second hit: | ||
[[File: | [[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| | [[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| | [[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| | |||
[[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: | [[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
Target in vs. target out
Gamma peak is revealed by comparing target in and target out runs.
.jpg)
ToF
[math]\displaystyle{ Neutron TOF=\frac{PMT_{top}+PMT_{bottom}}{2}-t_{\gamma peak}+\gamma_{TOF} }[/math]
Energy
Neutron Energy:
[math]\displaystyle{ \frac{1}{2}m_{n}\left(\frac{in}{ns}\right)^2=3.372\left(\frac{42}{t}\right)^2 MeV }[/math]
Watt distribution:
[math]\displaystyle{ Ce^{-aE^'}\sinh\left(\sqrt{bE^'}\right)=0.708 e^{-0.884 E^'}\sinh \left(\sqrt{E^'}\right) }[/math]
Second Hit
Odd TDC spectrum in the second hit:
Applying cuts based on TDC difference could help:
Opening angles
Uncorrelated distribution from detectors 1-4:
Analyzing 5653446 pulses from DU runs, I was able to find 349 two-neutron events in detectors 1-4.
As a test I did the same for gamma events:
Go back 2nCor_44