Compact x-ray tube based on carbon nanotube cold cathode emitter for handheld type x-ray application

Jongmin Lim; Amar Prasad Gupta; Jaeik Jung; Jaekyu Jang; Jinho Choi; Shalini Rajpoot; Seung Jun Yeo; Jeung Sun Ahn; Jehwang Ryu

doi:10.1117/12.2613310

Compact x-ray tube based on carbon nanotube cold cathode emitter for handheld type x-ray application

Jongmin Lim, Amar Prasad Gupta, Jaeik Jung, Jaekyu Jang, Jinho Choi, Shalini Rajpoot, Seung Jun Yeo, Jeung Sun Ahn, Jehwang Ryu

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

A Carbon nanotube (CNT) cold cathode emitter-based compact X-ray tube for X-ray application is studied in this paper. In the electron gun, the conventional filament was replaced by CNT emitter; CNTs were grown on metal alloy substrate. Using this electron gun, electron emission can be controlled by applying voltage rather than heating. Up to 2 mA tube current can be generated by this CNT electron gun. Also, the pulsed tube current and pulsed radiation dose can be generated by using MOSFET circuit. We measured the radiation dose generated in 30 frames per second, and confirmed that the waveform was generated as a square wave. From that waveform, it was confirmed that unnecessary radiation exposure can be minimized. The body of the X-ray tube is made of ceramic, which has strong durability against impact and high temperature. The ceramic used for the tube has an insulation distance of 30 mm and shows stable insulation performance in an environment where a voltage of 70 kV is applied. Using this X-ray tube, we successfully obtained X-ray images of various objects with acceleration voltages between 45 kV and 70 kV.

Original language	English
Title of host publication	Medical Imaging 2022
Subtitle of host publication	Physics of Medical Imaging
Editors	Wei Zhao, Lifeng Yu
Publisher	SPIE
ISBN (Electronic)	9781510649378
DOIs	https://doi.org/10.1117/12.2613310
Publication status	Published - 2022
Event	Medical Imaging 2022: Physics of Medical Imaging - Virtual, Online Duration: 21 Mar 2022 → 27 Mar 2022

Publication series

Name	Progress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume	12031
ISSN (Print)	1605-7422

Conference

Conference	Medical Imaging 2022: Physics of Medical Imaging
City	Virtual, Online
Period	21/03/22 → 27/03/22

Bibliographical note

Publisher Copyright:
© 2022 SPIE.

Keywords

Carbon nanotube
Compact X-ray tube
Field emission
Pulsed driving

Access to Document

10.1117/12.2613310

Cite this

Lim, J., Gupta, A. P., Jung, J., Jang, J., Choi, J., Rajpoot, S., Yeo, S. J., Ahn, J. S., & Ryu, J. (2022). Compact x-ray tube based on carbon nanotube cold cathode emitter for handheld type x-ray application. In W. Zhao, & L. Yu (Eds.), Medical Imaging 2022: Physics of Medical Imaging Article 120314H (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 12031). SPIE. https://doi.org/10.1117/12.2613310

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title = "Compact x-ray tube based on carbon nanotube cold cathode emitter for handheld type x-ray application",

abstract = "A Carbon nanotube (CNT) cold cathode emitter-based compact X-ray tube for X-ray application is studied in this paper. In the electron gun, the conventional filament was replaced by CNT emitter; CNTs were grown on metal alloy substrate. Using this electron gun, electron emission can be controlled by applying voltage rather than heating. Up to 2 mA tube current can be generated by this CNT electron gun. Also, the pulsed tube current and pulsed radiation dose can be generated by using MOSFET circuit. We measured the radiation dose generated in 30 frames per second, and confirmed that the waveform was generated as a square wave. From that waveform, it was confirmed that unnecessary radiation exposure can be minimized. The body of the X-ray tube is made of ceramic, which has strong durability against impact and high temperature. The ceramic used for the tube has an insulation distance of 30 mm and shows stable insulation performance in an environment where a voltage of 70 kV is applied. Using this X-ray tube, we successfully obtained X-ray images of various objects with acceleration voltages between 45 kV and 70 kV.",

keywords = "Carbon nanotube, Compact X-ray tube, Field emission, Pulsed driving",

author = "Jongmin Lim and Gupta, {Amar Prasad} and Jaeik Jung and Jaekyu Jang and Jinho Choi and Shalini Rajpoot and Yeo, {Seung Jun} and Ahn, {Jeung Sun} and Jehwang Ryu",

note = "Publisher Copyright: {\textcopyright} 2022 SPIE.; Medical Imaging 2022: Physics of Medical Imaging ; Conference date: 21-03-2022 Through 27-03-2022",

year = "2022",

doi = "10.1117/12.2613310",

language = "English",

series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",

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Lim, J, Gupta, AP, Jung, J, Jang, J, Choi, J, Rajpoot, S, Yeo, SJ, Ahn, JS & Ryu, J 2022, Compact x-ray tube based on carbon nanotube cold cathode emitter for handheld type x-ray application. in W Zhao & L Yu (eds), Medical Imaging 2022: Physics of Medical Imaging., 120314H, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, vol. 12031, SPIE, Medical Imaging 2022: Physics of Medical Imaging, Virtual, Online, 21/03/22. https://doi.org/10.1117/12.2613310

Compact x-ray tube based on carbon nanotube cold cathode emitter for handheld type x-ray application. / Lim, Jongmin; Gupta, Amar Prasad; Jung, Jaeik et al.
Medical Imaging 2022: Physics of Medical Imaging. ed. / Wei Zhao; Lifeng Yu. SPIE, 2022. 120314H (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 12031).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Compact x-ray tube based on carbon nanotube cold cathode emitter for handheld type x-ray application

AU - Lim, Jongmin

AU - Gupta, Amar Prasad

AU - Jung, Jaeik

AU - Jang, Jaekyu

AU - Choi, Jinho

AU - Rajpoot, Shalini

AU - Yeo, Seung Jun

AU - Ahn, Jeung Sun

AU - Ryu, Jehwang

PY - 2022

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N2 - A Carbon nanotube (CNT) cold cathode emitter-based compact X-ray tube for X-ray application is studied in this paper. In the electron gun, the conventional filament was replaced by CNT emitter; CNTs were grown on metal alloy substrate. Using this electron gun, electron emission can be controlled by applying voltage rather than heating. Up to 2 mA tube current can be generated by this CNT electron gun. Also, the pulsed tube current and pulsed radiation dose can be generated by using MOSFET circuit. We measured the radiation dose generated in 30 frames per second, and confirmed that the waveform was generated as a square wave. From that waveform, it was confirmed that unnecessary radiation exposure can be minimized. The body of the X-ray tube is made of ceramic, which has strong durability against impact and high temperature. The ceramic used for the tube has an insulation distance of 30 mm and shows stable insulation performance in an environment where a voltage of 70 kV is applied. Using this X-ray tube, we successfully obtained X-ray images of various objects with acceleration voltages between 45 kV and 70 kV.

AB - A Carbon nanotube (CNT) cold cathode emitter-based compact X-ray tube for X-ray application is studied in this paper. In the electron gun, the conventional filament was replaced by CNT emitter; CNTs were grown on metal alloy substrate. Using this electron gun, electron emission can be controlled by applying voltage rather than heating. Up to 2 mA tube current can be generated by this CNT electron gun. Also, the pulsed tube current and pulsed radiation dose can be generated by using MOSFET circuit. We measured the radiation dose generated in 30 frames per second, and confirmed that the waveform was generated as a square wave. From that waveform, it was confirmed that unnecessary radiation exposure can be minimized. The body of the X-ray tube is made of ceramic, which has strong durability against impact and high temperature. The ceramic used for the tube has an insulation distance of 30 mm and shows stable insulation performance in an environment where a voltage of 70 kV is applied. Using this X-ray tube, we successfully obtained X-ray images of various objects with acceleration voltages between 45 kV and 70 kV.

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M3 - Conference contribution

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T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE

BT - Medical Imaging 2022

A2 - Zhao, Wei

A2 - Yu, Lifeng

PB - SPIE

T2 - Medical Imaging 2022: Physics of Medical Imaging

Y2 - 21 March 2022 through 27 March 2022

ER -

Compact x-ray tube based on carbon nanotube cold cathode emitter for handheld type x-ray application

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