AN EXPERIMENTAL INVESTIGATION OF THE MICROWAVE RADIATION EMITTED BY A HIGH CURRENT RELATIVISTIC ELECTRON BEAM,
Abstract
The development of a high frequency in a relativistic electron beam, propagating through a drift space, has been studied from measurements of the microwave emission from the beam. The results show that a part of the radiation is emitted from the region close to the beam front and that the intensity of this emission grows in time as it is convected along with the beam. The growth rate is of the order of 100,000,000/sec. and depends on the macroscopic flow parameters. Experiments in different gases show that the growth rates are approximately proportional to the ionization probability of the gas. Precursor radiation is also monitored at comparable power levels to those found at the beam front. Possible explanations of the radiation are proffered and the physical importance of the emission (about 100 kw/m. length of drift tube) on beam neutralization and structure are indicated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1970
- Accession Number
- AD0707086
Entities
People
- John A. Nation
- Walter L. Gardner
Organizations
- Cornell University