The design of a pseudospark chamber, a high-voltage (>100
kV), high-current density, low-emittance and high-brightness electron
beam source which can provide high-quality beams for free-electron lasers
(FELs), driven by a modified pulse line accelerator, is presented.
Based on the hollow cathode (HC) effect and the pseudospark (PS)
empirical formula, the HC parameters, the cathode-anode separation,
and the working gas pressure region are determined. The general experimental
setup of the high-brightness PS-produced electron beam
source is shown.
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