Effect of the reverse voltage to the Si-PIN detector

Reverse voltage can cause two obvious changes of a Si-PIN detector. The detector terminal capacitance reduces and dark current increases when the reverse voltage increases, while both terminal capacitance and dark current are the most important aspects that affect the performance of the Si-PIN detectors. The authors will discuss the relationship between the reverse voltage and energy resolution of a spectrometer based on Si-PIN detector, and determine some principle of selecting the reverse voltage. (authors)