Development of a multi-pixel hybrid photo-detector with high quantum efficiency and gain

Details Development of a multi-pixel hybrid photo-detector with high quantum efficiency and gain Development of a multi-pixel hybrid photo-detector with high quantum efficiency and gain

2004-02-26

arxiv.org/abs/physics/0402126v1

IEEE Trans.Nucl.Sci. 51 (2004) 1056-1059

Physics

Instrumentation and Detectors

5 page, 9 figures

Scientific paper

10.1109/TNS.2004.829657

A hybrid photo-detector (HPD) consisting of a photocathode and a multi-pixel avalanche diode (MP-AD) was developed a few years ago. Our previous studies showed that its inherent potential for high resolution photon counting could be further enhanced by reducing fluctuations in charge loss in the dead layer at the entrance of the MP-AD. In this paper, we report on the improvement with the newly developed HPD whose encapsulated MP-AD has a thinner dead layer than before. It is demonstrated that the new HPD has much better energy resolution, which enables clearer counting up to nine photoelectrons. Further enhancement of the photocathode sensitivity of the HPD is also discussed.

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