Pseudospark-sourced sheet electron beam for application in high power millimeter wave radiation generation

Yin, Huabi and Shu, Guoxiang and Zhang, L. and He, W. and Zhao, J. and Phelps, A.D.R. and Cross, A. W. (2018) Pseudospark-sourced sheet electron beam for application in high power millimeter wave radiation generation. In: IRMMW-THz 2018, 2018-09-09 - 2018-09-14.

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    Abstract

    This paper presents the plasma-sourced sheet electron beam generation based on a pseudospark discharge. This beam source has advantages of high current density, ion-channel assisted beam focus, long life and simplicity with no external guiding magnetic field needed for beam transportation. A collimator of cross section size of 2.0mm × 0.25mm is used in the sheet beam generation and propagation experiments. Sheet beam currents in the range of 6A to 21 A (~104 A/cm2 current density) and peak voltage of ~32 kV were measured after the sheet beam has propagated a distance of 10-mm without any external focusing magnetic field. Furthermore the pseudospark-sourced sheet electron beams were successfully used to drive both a W-band (75-110 GHz) and a G-band (200 GHz) planar extended interaction oscillator (EIO), with beam tunnel of approximately 2.8mm × 0.5mm and 1.0 mm × 0.17 mm in cross sectional size respectively.