Accession Number:

AD0707086

Title:

AN EXPERIMENTAL INVESTIGATION OF THE MICROWAVE RADIATION EMITTED BY A HIGH CURRENT RELATIVISTIC ELECTRON BEAM,

Descriptive Note:

Corporate Author:

CORNELL UNIV ITHACA N Y LAB OF PLASMA STUDIES

Personal Author(s):

Report Date:

1970-04-01

Pagination or Media Count:

37.0

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 100,000,000sec. 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 kwm. length of drift tube on beam neutralization and structure are indicated. Author

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE