Difference between revisions of "Position/Timing resolution study with CO-60"
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| − | Go back [[ | + | Go back [[Van de Graaff room experiments]] |
| + | ==Test 1== | ||
A CO-60 source was placed 2" from the center of a detector, which was shielded from cosmics by 4" of lead, except for right below the source, where there was small pin hole through the lead. Placed directly above the source is a finger detector that is in hardware coincidence with either PMT. | A CO-60 source was placed 2" from the center of a detector, which was shielded from cosmics by 4" of lead, except for right below the source, where there was small pin hole through the lead. Placed directly above the source is a finger detector that is in hardware coincidence with either PMT. | ||
PMT threshold: 40 mV | PMT threshold: 40 mV | ||
| − | |||
Finger Threshold: 30 mV | Finger Threshold: 30 mV | ||
| + | PMT High voltage: 1700 V | ||
| − | [[File: | + | Event rate: 2.8 Hz |
| + | |||
| + | |||
| + | [[File:Firstest.png|800px]] | ||
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| + | ==Test 2== | ||
| + | PMT threshold: 40 mV | ||
| + | |||
| + | Finger Threshold: 30 mV | ||
| + | |||
| + | PMT High voltage: 1700 V | ||
| + | |||
| + | Event rate: 3.1 Hz | ||
| + | |||
| + | [[File:SecondTest.png|800px]] | ||
| + | |||
| + | Here is both sets of data superimposed and normalized to the count rate. | ||
| + | |||
| + | [[File:DualTimingGraph.png| 800px]] | ||
Latest revision as of 00:14, 20 May 2016
Go back Van de Graaff room experiments
Test 1
A CO-60 source was placed 2" from the center of a detector, which was shielded from cosmics by 4" of lead, except for right below the source, where there was small pin hole through the lead. Placed directly above the source is a finger detector that is in hardware coincidence with either PMT.
PMT threshold: 40 mV
Finger Threshold: 30 mV
PMT High voltage: 1700 V
Event rate: 2.8 Hz
Test 2
PMT threshold: 40 mV
Finger Threshold: 30 mV
PMT High voltage: 1700 V
Event rate: 3.1 Hz
Here is both sets of data superimposed and normalized to the count rate.
