Difference between revisions of "PePPO NaI PositronDetector 4 JLab"
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Running CODA: [[Running CODA]] | Running CODA: [[Running CODA]] | ||
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| + | ==Measurements Using V792 QDC== | ||
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| + | ===Run 1979=== | ||
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| + | [[File:1979_NaI_1185Volts.png| 200px]] | ||
==Gain== | ==Gain== | ||
Revision as of 18:30, 23 March 2011
Detector setup for a NaI positron detector for PePPO
NaI detector
The PMT is powered by a HV supply which should have a DC ripple less than 200 mV peak-to-peak at 3kV/3mA. A DC ripple will change the gain of the PMT and cause the energy resolution to deteriorate.
The Linearity of the detector system is another way to reduce the energy resolution. The measured PMT output should be linear with the input signal when the gain is constant. This linearity can be measured using 2 radiation sources.
Input HV: +1085 V
Input Current: 2.362 mA
Running CODA: Running CODA
Measurements Using V792 QDC
Run 1979
Gain
Linearity
Readout
F250
JLab's F250 flash ADC will be used to measure the NaI output