The Use of Finite J sub theta for Increasing the Ion Efficiency of High Impedance Diodes.
Abstract
Numerical simulations predict that the ratio of the effective ion current to total diode current can be significantly increased by introducing a small but finite azimuthal current into the tip of the cathode shank of a high impedance (4 omega) axial pinch-reflex diode. Such a current generates large tangential magnetic fields along the electron-emitting cathode surfaces. These fields, in turn, impart a finite angular momentum to the electrons as they are injected into the anode-cathode gap. The resultant particle self-fields alter electron trajectories in such a way as to boost electron space charge near certain portions of the ion-emitting anode surface. The net consequence is a modification of the radial profile of ion emission which enhances the net ion current transmitted through the interior of the hollow cathode shank. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 12, 1982
- Accession Number
- ADA114983
Entities
People
- Robert J. Barker
- Shyke A. Goldstein
Organizations
- United States Naval Research Laboratory