Pulse driving of CNT cathode-based electron emitter for multi-x-ray source

Junyoung Park; Amar Prasad Gupta; Kyung-Sik Yoon; Changwon Jeong; Kwon-Ha Yoon; Seungryong Cho; Jeung Sun Ahn; Mallory Mativenga; Jehwang Ryu

doi:10.1117/12.2655849

7 April 2023 Pulse driving of CNT cathode-based electron emitter for multi-x-ray source

Junyoung Park, Amar Prasad Gupta, Kyung-Sik Yoon, Changwon Jeong, Kwon-Ha Yoon, Seungryong Cho, Jeung Sun Ahn, Mallory Mativenga, Jehwang Ryu

Author Affiliations +

Proceedings Volume 12463, Medical Imaging 2023: Physics of Medical Imaging; 124634N (2023) https://doi.org/10.1117/12.2655849
Event: SPIE Medical Imaging, 2023, San Diego, California, United States

Conference Poster

Abstract

We present an electron emitter for multi-X-ray source system such as computed tomography (CT) or tomosynthesis. The electron emitter used in the X-ray source was fabricated using carbon nanotubes with excellent electrical properties as a cold cathode. A metal-oxide-semiconductor field-effect transistor (MOSFET) circuit was added between the cathode of the electron emitter and the ground to enable pulse driving according to the input signal. The field emission characteristics of the electron emitter were tested in a self-made vacuum system. Pulse driving of the electron emitter was performed at a frequency of 10 kHz and a duty of 50%, and a maximum cathode current of 3.9 mA flowed at a gate voltage of 2.1 kV. In addition, it was possible to take X-ray images of the chest phantom and metronome using an X-ray source made with a CNT-based electron emitter.

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Junyoung Park, Amar Prasad Gupta, Kyung-Sik Yoon, Changwon Jeong, Kwon-Ha Yoon, Seungryong Cho, Jeung Sun Ahn, Mallory Mativenga, and Jehwang Ryu "Pulse driving of CNT cathode-based electron emitter for multi-x-ray source", Proc. SPIE 12463, Medical Imaging 2023: Physics of Medical Imaging, 124634N (7 April 2023); https://doi.org/10.1117/12.2655849

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