ELECTROSTATIC FOCUSING OF HOLLOW SPIRALING ELECTRON BEAMS.
Abstract
A number of experimental models of a radial injection cathode for electrostatic focusing were built and tested. The most successful of these models gave a transmission efficiency of about 70% at low perveances. The highest perveance model gave a maximum of 30% transmission. A theoretical description has been developed for the focusing of a hollow spiraling electron beam which indicates the limits on this technique. It also gives design information on injection requirements. A computer study was made of the potential in the injection region in the absence of space charge. A computer study was also made of beam trajectories in the electrostatic focusing region under a variety of injection conditions. A computer study was begun of a simplified cathode injection area including the motion of emitted electrons and space charge effects. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1967
- Accession Number
- AD0650577
Entities
People
- M. Ettenberg
Organizations
- City College of New York