Accession Number : AD0650577

Title :   ELECTROSTATIC FOCUSING OF HOLLOW SPIRALING ELECTRON BEAMS.

Descriptive Note : Final rept., 5 Jan 65-Nov 66,

Corporate Author : CITY COLL RESEARCH FOUNDATION NEW YORK

Personal Author(s) : Ettenberg,M.

Report Date : MAR 1967

Pagination or Media Count : 94

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)

Descriptors :   (*ELECTRON BEAMS, FOCUSING), ELECTRON GUNS, CATHODES(ELECTRON TUBES), SPACE CHARGE, MICROWAVE EQUIPMENT, PERFORMANCE(ENGINEERING)

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE