Accession Number : AD0271004

Title :   ELECTRODYNAMIC PROBLEMS OF ASTROPHYSICS

Descriptive Note : Technical status rept. no. 5, 1 Oct-31 Dec 61

Corporate Author : STANFORD UNIV CALIF MICROWAVE LAB

Personal Author(s) : STURROCK,P.A.

Report Date : JAN 1962

Pagination or Media Count : 5

Abstract : The origin of radiation at the second harmonic of the plasma frequency is set forth as the nonlinear mechanism which couples two plasma oscillations to one electromagnetic wave. This is at variance with the suggestion tha radiation at the second harmonic is to be attributed to scattering of the excited plasma oscillations from thermal fluctuations of the plasma at the plasma frequency. The difficulty in comparing radiation by the two mechanisms is that one would expect the wave-number spectra of the two types of excitation of the plasma to be quite different. In the case that the spectra are similar, it can easily be demonstrated that radiation by the nonlinear mechanism is more important than that due to the Ginzburg-Zheleznyakov mechanism. (Author)

Descriptors :   *ASTROPHYSICS, *OSCILLATION, *PLASMAS(PHYSICS), *SOLAR FLARES, ELECTROMAGNETIC RADIATION, EXTRATERRESTRIAL RADIO WAVES, GAS IONIZATION, HARMONIC ANALYSIS, MAGNETIC STORMS, MAGNETOHYDRODYNAMICS, NONLINEAR SYSTEMS, PLASMAS(PHYSICS), SHOCK WAVES, SOLAR CORONA, GEOMAGNETISM, THERMAL RADIATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE