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Proceedings Paper

Radiation tolerant compact image sensor using CdTe photodiode and field emitter array (Conference Presentation)
Author(s): Tomoaki Masuzawa; Yoichiro Neo; Hidenori Mimura; Tamotsu Okamoto; Masayoshi Nagao; Masafumi Akiyoshi; Nobuhiro Sato; Ikuji Takagi; Hiroshi Tsuji; Yasuhito Gotoh

Paper Abstract

A growing demand on incident detection is recognized since the Great East Japan Earthquake and successive accidents in Fukushima nuclear power plant in 2011. Radiation tolerant image sensors are powerful tools to collect crucial information at initial stages of such incidents. However, semiconductor based image sensors such as CMOS and CCD have limited tolerance to radiation exposure. Image sensors used in nuclear facilities are conventional vacuum tubes using thermal cathodes, which have large size and high power consumption. In this study, we propose a compact image sensor composed of a CdTe-based photodiode and a matrix-driven Spindt-type electron beam source called field emitter array (FEA). A basic principle of FEA-based image sensors is similar to conventional Vidicon type camera tubes, but its electron source is replaced from a thermal cathode to FEA. The use of a field emitter as an electron source should enable significant size reduction while maintaining high radiation tolerance. Current researches on radiation tolerant FEAs and development of CdTe based photoconductive films will be presented.

Paper Details

Date Published: 2 November 2016
PDF: 1 pages
Proc. SPIE 9969, Radiation Detectors: Systems and Applications XVII, 996902 (2 November 2016); doi: 10.1117/12.2238378
Show Author Affiliations
Tomoaki Masuzawa, Shizuoka Univ. (Japan)
Yoichiro Neo, Shizuoka Univ. (Japan)
Hidenori Mimura, Shizuoka Univ. (Japan)
Tamotsu Okamoto, National Institute of Technology, Kisarazu College (Japan)
Masayoshi Nagao, National Institute of Advanced Industrial Science and Technology (Japan)
Masafumi Akiyoshi, Osaka Prefecture Univ. (Japan)
Nobuhiro Sato, Kyoto Univ. (Japan)
Ikuji Takagi, Kyoto Univ. (Japan)
Hiroshi Tsuji, Kyoto Univ. (Japan)
Yasuhito Gotoh, Kyoto Univ. (Japan)

Published in SPIE Proceedings Vol. 9969:
Radiation Detectors: Systems and Applications XVII
Gary P. Grim; H. Bradford Barber; Lars R. Furenlid, Editor(s)

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