Accession Number:

AD0601669

Title:

THE NONLINEAR INTERACTION OF AN ELECTROMAGNETIC WAVE WITH A TIME-DEPENDENT PLASMA MEDIUM.

Descriptive Note:

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s):

• Papa,Robert J.

Report Date:

1964-04-01

Pagination or Media Count:

42.0

Abstract:

A one-dimensional, inhomogeneous model is used to describe the nonlinear interaction of a radiofrequency plane wave with a time-varying plasma medium. A nonlinear constitutive relationship is derived relating the macroscopic-current density to the impressed electric vector, assuming that the wave field is almost monochromatic in the medium. The time-dependent response of the plasma medium may be found by numerically solving the energy-balance equations and the continuity equation for the electron gas. The electron temperature is expressed in the form of a difference equation where the effects of the thermal conductivity of the electron gas may be included. The spread in frequency of the electromagnetic wave field due to the time-varying electrical conductivity may be computed by employing the WKB approximation as a solution to the wave equation for a time-varying medium. Author

Descriptors:

• *ELECTROMAGNETIC RADIATION
• PLASMAS(PHYSICS)
• PLASMAS(PHYSICS)
• RADIO WAVES
• NONLINEAR SYSTEMS
• ELECTRONS
• TEMPERATURE
• RELAXATION TIME
• VECTOR ANALYSIS
• DIFFERENCE EQUATIONS
• ELECTROMAGNETIC FIELDS
• PROPAGATION

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE