Difference between revisions of "August 15, 2007 - Cosmic Telescope"

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Revision as of 20:36, 15 August 2007

Since we have now mapped out the Bases and their opperating ranges, we will proceed to find the best High Voltage opperating ranges of the Scintillators. We have set the Thresholds at 275 mV each. The Top Scintillator is connected to Base 1 and the bottom scintillator is connected to base 2. We began by setting both scintillators at a High Voltage of 1300 and measuring the counts. After this was done, one scintillator was set at a voltage of 1300 and the other's voltage was changed at increments of 50 down to 1100 and up to 1400. This opperation was performed for both scintillators.

Plateau of Top Scintillator
Time HV on top scint. HV on bottom scint. Singles Count (on top) Coinc. Counts Coinc. per minute
90 min 1300 1300 7265 233 2.59
30 min 1300 1300 2462 87 2.33
30 min 1250 1300 1817 70 2.3
30 min 1200 1300 1129 69 2.37
30 min 1150 1300 535 71 2.37
30 min 1100 1300 174 21 0.07
Plateau of Bottom Scintillator
Time HV on top scint. HV on bottom scint. Singles Count (on top) Coinc. Counts Coinc. per minute
30 min 1300 1300 2462 87 2.77
90 min 1300 1250 1817 70 2.36
30 min 1300 1200 1129 69 1.23
30 min 1300 1150 535 71 0.267
90 min 1300 1100 174 21 0.0667
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