What is the difference between SiPM and PMT readout methods?

SiPMs are an alternative readout method to standard PMTs. With respect to signal processing and spectroscopic behavior, SiPMs behave differently compared to standard PMTs. The elements are typically 3x3 or 6x6 mm and can be combined into matrices. For applications where a small crystal size and low voltage operations are required SiPM readout can be a good choice. The energy resolution and noise level achievable with SiPM readouts depend on crystal dimensions, scintillation material, and how much area is covered by the SiPMs

For larger scintillation crystals, it is important to strategically place as few SiPMs as possible. It is impractical to use too many SiPMs because the capacitive notice on the signal 

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