Accession Number : AD0697370

Title :   MICROWAVE EMISSION AT ELECTRON CYCLOTRON HARMONICS,

Corporate Author : STANFORD UNIV CALIF INST FOR PLASMA RESEARCH

Personal Author(s) : Ikegami,Hideo

Report Date : OCT 1965

Pagination or Media Count : 39

Abstract : Microwave emission at electron cyclotron harmonics has been studied in a mercury-vapor discharge in a static magnetic field at a fixed frequency of 8.500 Mc. Dispersion, half-widths, and intensities of radiation peaks have been measured. The half-widths are found to be almost independent of a harmonic number in the lower density region and increase with electron densities. The radiation intensity first grows rapidly with electron density and then decreases with further density increase. This defines a maximum intensity which is approximately independent of electron density and harmonic number. When a resonance peak shifts from the cyclotron harmonics with increasing density, a distinct dip in the radiation intensity is observed. This is found to occur at exact cyclotron harmonics independent of the electron density. Some theoretical considerations are given to account for the observed results. (Author)

Descriptors :   (*GAS DISCHARGES, ELECTRON BEAMS), (*CYCLOTRON RESONANCE PHENOMENA, MICROWAVES), MERCURY, ELECTRON DENSITY, MAGNETIC FIELDS, ELECTROSTATICS

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE