Neutron Time of Flight Test

Verifying Neutron Detection

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This test included one detector and a collimated Cf-252 source. The detector was placed 16 inches away from the source collimator. Tests were performed with various thicknesses of poly in between the two. Each count was 5 minutes long and three counts were taken for each test. Detector D was used at 1618 volts through channel 3 of LeCroy power supply and a threshold of 77mV set through the blue faced CFD.

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Test for Neutron Time of Flight

setup	1 poly block (4")	2 poly blocks (8")	3 ply blocks (12")	4 poly blocks (16")	no poly	background	background with detector shielded with 4" poly
test 1 counts	7180	5142	3945	3235	11793	1620	1314
test 2 counts	7291	5213	3994	3084	11694	1648	1336
test 3 counts	7319	5205	4014	3150	11872	1629	1352
averages	7263	5187	3984	3156	11786	1632	1334