CdTe detector characteristics around 30掳C when using the periodic bias reset technique

摘要

Pulse heights of the CdTe detector photopeaks were lowered in several ten minutes due to the polarization effect around 30degC. In this paper, the CdTe detector characteristics were evaluated at 30degC and 35degC, and the periodic bias reset technique was investigated as a way to stabilize the detector performance. The 500 V bias with 0.5 s to 60s reset durations and 1 min to 20 min reset intervals was applied to 1 mm thick CdTe detectors. It was found that the 0.5 s reset duration and 5 min reset interval was able to stabilize the detector performance at 35degC.