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Title: High-current long-duration uniform electron beam generation in a diode with multicapillary carbon-epoxy cathode

The results of reproducibly generating an electron beam with a current density of up to 5 kA/cm{sup 2}, without the cathode-anode gap being shorted by the plasma formed inside the cathode carbon-epoxy capillaries, in a ∼350 kV, ∼600 ns diode, with and without an external guiding magnetic field, are presented. The cathode sustained hundreds of pulses without degradation of its emission properties. Time- and space-resolved emissions of the plasma and spectroscopy analyses were used to determine the cathode plasma's density, temperature, and expansion velocity.
Authors:
; ;  [1]
  1. Physics Department, Technion, Haifa 32000 (Israel)
Publication Date:
OSTI Identifier:
22217977
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANODES; CARBON; CATHODES; CURRENT DENSITY; ELECTRON BEAMS; ELECTRON DENSITY; ELECTRON TEMPERATURE; EPOXIDES; ION TEMPERATURE; MAGNETIC FIELDS; PLASMA DENSITY; PLASMA DIAGNOSTICS; TIME RESOLUTION