1. Characteristics of Carbon Nanotube Cold Cathode Triode Electron Gun Driven by MOSFET Working at Subthreshold Region.
- Author
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Guo, Yajie, Li, Baohong, Zhang, Yu, Deng, Shaozhi, and Chen, Jun
- Subjects
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ELECTRON field emission , *FIELD-effect transistors , *ELECTRON gun , *CHEMICAL vapor deposition , *CURRENT fluctuations , *METAL oxide semiconductor field-effect transistors , *CARBON nanotubes - Abstract
The carbon nanotube cold cathode has important applications in the X-ray source, microwave tube, neutralizer, etc. In this study, the characteristics of carbon nanotube (CNT) electron gun in series with metal-oxide-semiconductor field-effect transistor (MOSFET) were studied. CNTs were prepared on a stainless steel substrate by chemical vapor deposition and assembled with a mesh gate to form an electron gun. The anode current of the electron gun can be accurately regulated by precisely controlling the MOSFET gate voltage in the subthreshold region from 1 to 40 µA. The current stability measurements show the cathode current fluctuation was 0.87% under 10 h continuous operation, and the corresponding anode current fluctuation was 2.3%. The result has demonstrated that the MOSFET can be applied for the precise control of the CNT electron gun and greatly improve current stability. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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