Abstract:We present a series of experiments, in which the relativistic (5-20 MeV), low current (tens of milliamperes) electron beam from a microwave (2856 MHz) linear accelerator interacts with an air-filled cylindrical cavity whose pressure was varied from 1 µTorr to 100 torr. The pulsed structure of the electron beam drives an electromagnetic resonance in the cavity, but the magnitude of this resonant signal was seen to collapse on a time scale depending on cavity pressure. This is believed to be due to beam-driven g… Show more
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