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- W2052997771 abstract "This paper presents the construction of carbon-fiber-aluminum (CFA) cathode by squeezing casting and its applications for generating high-current electron beams to drive high-power microwave sources. The fabrication process avoided using epoxy, a volatile deteriorating the vacuum system. These cathodes had a higher hardness than conventional aluminum, facilitating machining. After surface treatment, carbon fibers became the dominator determining emission property. A multineedle CFA cathode was utilized in a triode virtual cathode oscillator (vircator), powered by a ∼450 kV, ∼400 ns pulse. It was found that 300–400 MW, ∼250 ns microwave was radiated at a dominant frequency of 2.6 GHz. Further, this cathode can endure high-current-density emission without detectable degradation in performance as the pulse shot proceeded, showing the robust nature of carbon fibers as explosive emitters. Overall, this new class of cold cathodes offers a potential prospect of developing high-current electron beam sources." @default.
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- W2052997771 date "2009-02-01" @default.
- W2052997771 modified "2023-10-18" @default.
- W2052997771 title "Robust, easily shaped, and epoxy-free carbon-fiber-aluminum cathodes for generating high-current electron beams" @default.
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- W2052997771 doi "https://doi.org/10.1063/1.3086728" @default.
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