Noise in Radiation Detectors

All detectors are limited in the minimum radiant power which they can detect by some form of noise which may arise in the detector itself, in the radiant energy to which the detector responds, or in the electronic system following the detector. Careful electronic design including that of low noise amplification can reduce system noise below that in the output of the detector. That topic will not be treated here see Motchenbacher and Fitchen [2.140] for details. 

The other sources are radiation noise and noise internal to the detector. It is the objective of optimum detector design to reduce the internal noise of the 

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