Difference between revisions of "Neutron Time of Flight Test"

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[[Verifying Neutron Detection]]
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==Verifying Neutron Detection==
[[Time of Flight Test]]
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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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{| border="1" cellpadding="20" cellspacing="0"
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|-
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|setup
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|1 poly block (4")
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|2 poly blocks (8")
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|3 ply blocks (12")
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|4 poly blocks (16")
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|no poly
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|background
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|background with detector shielded with 4" poly
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|-
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|test 1 counts
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|7180
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|5142
 +
|3945
 +
|3235
 +
|11793
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|1620
 +
|1314
 +
|-
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|test 2 counts
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|7291
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|5213
 +
|3994
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|3084
 +
|11694
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|1648
 +
|1336
 +
|-
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|test 3 counts
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|7319
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|5205
 +
|4014
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|3150
 +
|11872
 +
|1629
 +
|1352
 +
|-
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|averages
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|7263
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|5187
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|3984
 +
|3156
 +
|11786
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|1632
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|1334
 +
|-
 +
|}
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----
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==Test for Time of Flight==
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A test was performed using a Cf-252 source and two plastic scintillator detectors.  The two detectors were placed in parallel with the source.  The idea was that the source would emit a neutron and that neutron would hit the first detector and then the second.  The signals from the detectors would show up on the oscilloscope being spaced a certain measurable distance/time apart.  This was acquired by gating the signal.
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[http://wiki.iac.isu.edu/index.php/PhotoFission_with_Polarized_Photons_from_HRRL Go Back]

Latest revision as of 06:22, 5 February 2009

Verifying Neutron Detection


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.


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

Test for Time of Flight

A test was performed using a Cf-252 source and two plastic scintillator detectors. The two detectors were placed in parallel with the source. The idea was that the source would emit a neutron and that neutron would hit the first detector and then the second. The signals from the detectors would show up on the oscilloscope being spaced a certain measurable distance/time apart. This was acquired by gating the signal.

Go Back