Radiation tolerant compact image sensor using CdTe photodiode and field emitter array
(Conference Presentation)

Tomoaki Masuzawa; Yoichiro Neo; Hidenori Mimura; Tamotsu Okamoto; Masayoshi Nagao; Masafumi Akiyoshi; Nobuhiro Sato; Ikuji Takagi; Hiroshi Tsuji; Yasuhito Gotoh

doi:10.1117/12.2238378

2 November 2016 Radiation tolerant compact image sensor using CdTe photodiode and field emitter array (Conference Presentation)

Tomoaki Masuzawa, Yoichiro Neo, Hidenori Mimura, Tamotsu Okamoto, Masayoshi Nagao, Masafumi Akiyoshi, Nobuhiro Sato, Ikuji Takagi, Hiroshi Tsuji, Yasuhito Gotoh

Author Affiliations +

Proceedings Volume 9969, Radiation Detectors: Systems and Applications XVII; 996902 (2016) https://doi.org/10.1117/12.2238378
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Tomoaki Masuzawa, Yoichiro Neo, Hidenori Mimura, Tamotsu Okamoto, Masayoshi Nagao, Masafumi Akiyoshi, Nobuhiro Sato, Ikuji Takagi, Hiroshi Tsuji, and Yasuhito Gotoh "Radiation tolerant compact image sensor using CdTe photodiode and field emitter array (Conference Presentation)", Proc. SPIE 9969, Radiation Detectors: Systems and Applications XVII, 996902 (2 November 2016); https://doi.org/10.1117/12.2238378

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KEYWORDS

Image sensors

Finite element methods

Photodiodes

Tolerancing

CCD image sensors

Charge-coupled devices

Earthquakes

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