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BWO-circuit was designed to generate hundreds MW electromagnetic wave on X-band in this study. A RF coupler is designed and fabricated to measure the power of an electromagnetic wave which is generated in the slow wave structure of a relativistic backward wave oscillator (RBWO) before this wave is radiated through an antenna. To pickup about -63 dB of total output power and avoid a RF breakdown in...
A mode competition phenomenon of gigawatts-nanonoseconds magnetically insulated transmission line oscillator (MILO) is experimentally investigated. A pulsed power system of 500 kV-35 kA and 130 ns pulse length is used for generating the relativistic electron beam. The microwave with peak power of 2.8 GW, pulse duration of 70 ns, and frequency of 1.14 GHz is observed. A spatiotemporal measurement using...
An rippled-wall RBWO is operated at the beam voltage of 250~400kV and current of 2.1~3.4 kA using the 130nsec, single shot using Seoul National University's electron beam accelerator (SEBA). SEBA produces a hollow beam of 19.2mm-outer radius, 0.7-thickness guided by an axial magnetic field of 1.7-3.4 Tesla. The uniform ripple has a period of 11mm, mean radius of 14mm and ripple amplitude of 2mm. A...
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