The preliminary design of a new pseudospark (PS) chamber - high power,intense current density, lower emittance and high brightness electron beam source driven by a modified water - filled Blumlein pulse-forming line is presented. Based on the hollow cathode (HC) effect and the pseudospark empirical formulus, various data including the HC and the cathode-anode distance, the working gas pressure region are given. The general experimental scheme of a high-brightness PS-produced electron beam source is shown.