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mLine 22:
Line 22: + + + + − + − − ## periodically acquire an ensemble of pulses in the dark to determine gain, and dark rate − ## periodically acquire an ensemble of pulses in the with a pulser to determine gain, and photo-detection efficiency
SiPM Radiation Hardness Tests (view source)
Revision as of 06:17, 12 August 2010
, 06:17, 12 August 2010→Proposed Measurement Program
# Relaxation time (of duration determined by the apparent healing rate) with ''full measurement'' performed periodically.
# Relaxation time (of duration determined by the apparent healing rate) with ''full measurement'' performed periodically.
# Repetition of 1. and 2. as desired to determine the recovery extent
# Repetition of 1. and 2. as desired to determine the recovery extent
# Proceed with a longer irradiation period until significant curvature is seen in the change of the performance parameters in order to measure the decay function (e.g. two exponential?)
# Irradiate the unit for a much longer duration - until some saturation of the performance parameters is seen. This will help determine the offset in the model of the deterioration of performance parameters.
# Irradiate the unit for a much longer duration - until some saturation of the performance parameters is seen. This will help determine the offset in the model of the deterioration of performance parameters.
"Full measurement" above refers to the following:
# collection of an ensemble of pulse integrals in the dark to determine the dark rate and gain
# collection of an ensemble of pulse integrals with a pulser at low setting to determine gain, and photo-detection efficiency
Performing (2) at low enough pulser settings to count photons allows a check of the gain against the result in the dark count analysis. In the worst case, higher intensity light pulses may be used: the efficiency is then determined using the gain determined in (1).
== Links ==
== Links ==