Accession Number:

AD0753690

Title:

Multistream Interactions in Stratified and Space-Time Periodic Media.

Descriptive Note:

Technical rept.,

Corporate Author:

CALIFORNIA INST OF TECH PASADENA ANTENNA LAB

Personal Author(s):

• Elachi,Charles

Report Date:

1972-09-01

Pagination or Media Count:

28.0

Abstract:

Multistream interactions are studied when the propagation medium dielectric or plasma is stratified or space-time periodic i.e., the medium parameters behave like alphaz,t alpha sub 0 1eta fKz-omega t where fxi is a periodic function. The space-time periodicity can be considered as due to a strong pump wave. The types of interactions were determined using different methods Taylor series development, power flow method with conservation of energy and momentum, and a numerical method based on the wave equation solution. The Brillouin diagram in the limit eta approaches 0 is used to investigate different aspects of the problem without extensive computations. It is found that all types of interactions, stable and unstable, can occur even if they did not exist in the homogeneous case. Author

Descriptors:

• *ELECTROMAGNETIC RADIATION
• *PLASMAS(PHYSICS)
• DIELECTRICS
• STABILITY
• SPACE CHARGE
• MICROWAVES
• INTERACTIONS
• PARTIAL DIFFERENTIAL EQUATIONS

Subject Categories:

• Plasma Physics and Magnetohydrodynamics
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE