JB Analysis

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JB_DAQ

Vandagraph room experiments

Vandagraph room

Elastic scattering in target

Elastic scattering

DU runs

TDC spectrum

DTC

Target in vs. target out

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

ToF

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

target_in_vs_target_out_ToF

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]

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:

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