CESIUM VAPOR CATHODE STUDY.
Abstract
Cesium-plasma cathodes have been studied as sources of very high-density electron beams. The commonemitter type of cathode using a highly directed cesiumvapor flow has been used to obtain a beam with a density of 800 A/sq cm. The beam was accelerated to 1.2kV without any occurrence of voltage breakdown or instabilities. The electron temperature is of the order of only twice the cathode temperature. A continuous current of 7 A has been extracted from a commonemitter cathode. It was possible to extract all emitted electrons from all common-emitter tubes tested. The separate-emitter type of tube with properly activated cathodes and directed vapor flow should provide beams with densities of 100 A/sq cm. Calculations have been made describing the stability and electron extraction from effusing, synthesized plasmas. Comparisons of theoretical and measured results are in fair agreement. A silver chloride seal has been shown to be a long-life seal for a tube using hot cesium vapor. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0614648
Entities
People
- A. E. Eichenbaum
- F. H. Norman
- H. Sobol
- S. Bloom
Organizations
- RCA Corporation