Production of sheet electron beams with crossed-field secondary emission diodes

This work is concerned with a development of a crossed-field secondary emission (CFSE) planar diode that is capable of producing sheet electron beams. Several diode designs having cathode widths of 45-80 mm have been tested and characteristics of the output electron beams were investigated. For diod...

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Published inPPPS-2001 Pulsed Power Plasma Science 2001. 28th IEEE International Conference on Plasma Science and 13th IEEE International Pulsed Power Conference. Digest of Papers (Cat. No.01CH37251) Vol. 1; pp. 118 - 121 vol.1
Main Authors Saveliev, Y.M., Sibbett, W., Kerr, B.A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2001
Subjects
Cathodes
Current density
Diodes
Electrodes
Electron beams
Magnetic fields
Physics
Production
Testing
Voltage
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Summary:This work is concerned with a development of a crossed-field secondary emission (CFSE) planar diode that is capable of producing sheet electron beams. Several diode designs having cathode widths of 45-80 mm have been tested and characteristics of the output electron beams were investigated. For diode voltages in the 25-40 kV range, the electron beams were generated with currents of 15-45A and linear current densities of 1-8A/cm depending on the diode voltage, magnetic field strength and the diode design. Cathode edge effects were found to be major contributory factors to non-uniformity of the linear current density distributions j(x) but their influence has been greatly reduced by incorporation of axial edge electrodes and downstream reflectors into the diode design and, as a result, 12% uniformity of j(x) has been achieved. It has been shown that the generation of thin (a few mm) sheet electron beams of /spl sim/1m wide with /spl sim/1-5A/cm current density is feasible.
ISBN:0780371208
9780780371200
DOI:10.1109/PPPS.2001.1002008