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Robustness of field emitter arrays against high-energy X-ray irradiation at high dose rate

Robustness of field emitter arrays against high-energy X-ray irradiation was demonstrated. The current-voltage characteristics of the field emitter array were investigated in a vacuum chamber connected to an electron accelerator. The electron beam with an energy of 1 MeV was incident onto a tungsten thin plate to produce X-rays. The field emitter array showed the almost identical current-voltage characteristics even under the X-ray irradiation, up to the absorbed dose of 1 kGy/h.