JB Anaysis: Difference between revisions
| Line 46: | Line 46: | ||
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== | ||
Revision as of 06:22, 15 August 2015
DU runs
TDC spectrum
Detector 1
Detector 2
Detector 3
Detector 4
Target in vs. target out
Gamma peak is revealed by comparing target in and target out runs.
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:
