Pseudospark-sourced beam and its application in high-power millimeter-wave generation

Zhang, Liang and Yin, Huabi and He, Wenlong and Chen, Xiaodong and Zhang, Jin and Cross, Adrian (2021) Pseudospark-sourced beam and its application in high-power millimeter-wave generation. Scientific Reports, 11 (1). 19076. ISSN 2045-2322 (

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A pseudospark (PS) discharge can generate an electron beam with a high current density. The electron beam can be self-focused by an ion channel and transported over a long distance without the need for an external magnetic field. Such features make it attractive to drive millimeter-wave/THz interaction circuits for the generation of high-power radiation from a compact device. This paper presents the experimental results on the generation and transportation of the PS-sourced beam with different cross-sections, as well as the differences of the PS-sourced beam with and without post acceleration. Its application in millimeter-wave/THz sources was demonstrated by the operation of extended interaction oscillators (EIOs) at different frequencies.