Development of a multipixel hybrid photodetector with high quantum efficiency and gain

Author

Suyama, M. ; Fukasawa, A. ; Haba, J. ; Iijima, T. ; Iwata, S. ; Sakuda, M. ; Sumiyoshi, T. ; Takasaki, F. ; Tanaka, M. ; Tsuboyama, T. ; Yamada, Y.

Author_Institution

Electron Tube Center, Iwata, Japan

Volume

51

Issue

3

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1056

Lastpage

1059

Abstract

A hybrid photodetector (HPD) consisting of a photocathode and a multipixel 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.

Keywords

avalanche diodes; gamma-ray detection; nuclear electronics; photodetectors; photon counting; semiconductor counters; HPD; charge loss; dead layer; encapsulated multipixel avalanche diode; energy resolution; fluctuations; high resolution photon counting; multipixel hybrid photodetector; photocathode sensitivity; photoelectrons; photon sensors; quantum efficiency; single photon; Cathodes; Diodes; Electron tubes; Energy resolution; Magnetic fields; Magnetic sensors; Optoelectronic and photonic sensors; Photodetectors; Physics; Voltage; HPD; Hybrid photodetctor; multipixel; photon sensor; single photon;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2004.829657

Filename

1312016