Shortening of the radiation pulse from a plasma relativistic microwave generator in numerical calculations with plasma simulation by the particle-in-cell method |
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Authors: | I L Bogdankevich O T Loza and D A Pavlov |
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Institution: | 1.Prokhorov General Physics Institute,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | Spontaneous shortening of radiation pulses of Cherenkov microwave generators based on the interaction of a high-current relativistic
electron beam with preliminarily generated plasma was studied in a numerical model. Microwave pulse shortening is caused by
the appearance of a gradually expanding region near the collector, from which plasma is expelled by an electrostatic field
of relativistic electrons. The absence of plasma results in a severalfold decrease in the plasma wave reflectance from the
collector and violation of generator self-excitation conditions. The microwave emission duration increases with the plasma
ion mass. |
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