Position/Timing resolution study with CO-60
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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.
