Difference between revisions of "August 17, 2007 - Cosmic Telescope"

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The Threshold on the Bottom Scintillator was setat 175 mV for this experiment while the top was left at 225mV.
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The Threshold on the Bottom Scintillator was set at 175 mV for this experiment while the top was left at 225mV.
  
 
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[[Image:Plateau of Bottom.jpg]]
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[[Image:rePlateau of Bottom.jpg]]
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As the data shows, this threshold is too low.  In this threshold area, we are picking up a lot of noise which gives up innaccurate readings.

Latest revision as of 20:00, 16 October 2007

The Threshold on the Bottom Scintillator was set at 175 mV for this experiment while the top was left at 225mV.

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 3558 6 2.8
30 min 1300 1250 4966 61 2.03
30 min 1300 1200 4547 77 2.57
30 min 1300 1150 4239 34 1.13
30 min 1300 1100 4398 6 0.267

RePlateau of Bottom.jpg

As the data shows, this threshold is too low. In this threshold area, we are picking up a lot of noise which gives up innaccurate readings.