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In order to investigate the performances of repetition rate (rep-rate) operation of an improved magnetically insulated transmission line oscillator (MILO), a series of experiments are carried out on the improved MILO device, which is driven by a 40 Ω, 50 ns rep-rate pulser: TORCH-01. Polymer velvet and graphite cathodes are tested respectively in the experiments, whose diameters and lengths are the...
A new magnetically insulated line oscillator (MILO) with two extracted vanes and coaxial varied impedance load structure was presented and analyzed. Simulation showed them to substantially outperform previous MILO variants, predicting efficiencies up to about 20%. Two distinct mechanisms were shown to contribute to this high efficiency. The first was the two extracted vanes adopted which usage was...
In this paper, a compact L-band coaxial relativistic backward wave oscillator (RBWO) is designed using the 2.5 D particle simulation code. The advantage of a coaxial extractor instead of the conventional collector in enhancing efficiency is analyzed theoretically. Detailed physical interactions of the device with and without the coaxial extractor are investigated through KARAT code, respectively....
In order to reduce the effective area of the receiving antenna to receiving microwave power in high electric field regions, a short dipole antenna is investigated numerically and experimentally in this paper. The short dipole antenna is a variation of the conventional half-wave antenna. A 50 Ω coaxial transmission line with two symmetrical narrow slots is employed as a feeder of the short dipole antenna...
Magnetically insulated transmission line oscillator (MILO) is a crossed field device designed specifically to generate microwave power at the gigawatt level, which is a major hotspot in the field of high-power microwaves (HPM) research at present. An improved MILO has been developed in our laboratory. When the improved MILO is driven by a 550kV, 54kA, 80ns electron beam, HPM is generated with power...
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