Development of a Field Emission Image Sensor Tolerant to Gamma-Ray Irradiation

A field emission image sensor (FEIS) that consists of a field emitter array (FEA) and a cadmium telluride-based diode was proposed for use in the nuclear decommissioning of the Fukushima Daiichi nuclear power plant. FEAs and cadmium telluride/cadmium sulfide diode were irradiated with γ-rays for a d...

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Bibliographic Details
Published in:IEEE transactions on electron devices 2020-04, Vol.67 (4), p.1660-1665
Main Authors: Gotoh, Yasuhito, Tsuji, Hiroshi, Nagao, Masayoshi, Masuzawa, Tomoaki, Neo, Yoichiro, Mimura, Hidenori, Okamoto, Tamotsu, Igari, Tomoya, Akiyoshi, Masafumi, Sato, Nobuhiro, Takagi, Ikuji
Format: Article
Language:English
Subjects:
Cadmium
Cadmium sulfide
Cadmium telluride
Cadmium tellurides
Current voltage characteristics
Electrodes
Electron emission
Emitters
Emitters (electron)
Field emission
field emitter arrays (FEAs)
Finite element method
Gamma rays
Image sensors
Industrial plant emissions
Intermetallic compounds
Logic gates
nickel
Nuclear power plants
Photoconducting materials
photoconductors
Radiation dosage
Radiation effects
Robot sensing systems
Sensor arrays
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Summary:A field emission image sensor (FEIS) that consists of a field emitter array (FEA) and a cadmium telluride-based diode was proposed for use in the nuclear decommissioning of the Fukushima Daiichi nuclear power plant. FEAs and cadmium telluride/cadmium sulfide diode were irradiated with γ-rays for a dozen times, each with a dose of irradiation of 100 kGy, until the accumulated dose of irradiation reached 1 MGy. Electron emission properties of the FEAs and the photovoltaic properties of the cadmium telluride/cadmium sulfide diode were evaluated after each irradiation. Neither the FEAs nor the cadmium telluride/cadmium sulfide diode showed significant deterioration in their current-voltage characteristics. A test tube of FEIS consisting of an FEA and cadmium telluride-cadmium sulfide diode showed a photo-detection performance both before and after the γ-ray irradiation to the dose of irradiation of 1 MGy.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2020.2977674