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SiPM Radiation Hardness Tests (view source)
Revision as of 06:17, 12 August 2010
, 06:17, 12 August 2010→Proposed Measurement Program
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−## 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
# 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 ==