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Pseudospark experiments: Cherenkov interaction and electron beam post-acceleration

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5 Author(s)
Yin, H. ; Phys. Dept., Univ. of Strathclyde, Glasgow, UK ; Cross, A.W. ; He, W. ; Phelps, A.D.R.
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Pseudospark (PS) discharge experiments to generate high-brightness electron beams have been carried out at the Strathclyde University, Glasgow, U.K. The PS-sourced electron beam has two phases, an initial 22-kV, 50-A hollow-cathode phase (HCP) beam of brightness 109-10 Am-2 rad-2 followed by a 200-V, 200-A conductive phase (CP) beam of brightness 1011-12 Am-2 rad-2. The initial HCP beam from an eight-gap PS discharge was applied for the first time in a Cherenkov interaction between the electron beam and the TM01 mode of a 60-cm long alumina-lined waveguide. A gain of 29±3 dB was measured and an output power of 2±0.2 kW in the frequency range 25.5-28.6 GHz. Another experiment was focused on the study of the propagation and post-acceleration of the CP beam from a three-gap PS discharge chamber. The beam was successfully accelerated from about 200 V to more than 40 kV.

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Plasma Science, IEEE Transactions on  (Volume:32 ,  Issue: 1 )