Stimulated backscattering of electromagnetic waves from electrostatic waves in a magnetized plasma

Journal Article · Fri Jun 01 04:00:00 EDT 1979 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.326473· OSTI ID:6245436

Willett, J E; Bilikmen, S

An analysis of the parametric decay of an intense electromagnetic wave into an electrostatic wave and a backscattered electromagnetic wave is presented. A generalized dispersion relation is derived which describes stimulated backscattering from four types of electrostatic waves propagating at an arbitrary angle with respect to a uniform static magnetic field. In the subsequent analysis of the absolute backscatter instability in homogeneous and inhomogeneous, bounded and unbounded plasma, approximations which permit independent treatment of the high-frequency electron modes and the low-frequency ion modes are invoked where appropriate. A numerical study of a laser beam with its direction of propagation making an angle theta equal to 5/sup 0/, 45/sup 0/, and 85/sup 0/ with the static magnetic field is discussed. Effects of the magnetic field on the growth rate ..gamma../sub 0/ in an unbounded plasma, the growth rate ..gamma.. in a bounded plasma, the basic gain length l/sub 0/, and the inhomogeneity parameter lambda are illustrated.

• Research Organization: Department of Physics, University of Missouri-Columbia, Columbia, Missouri 65211
• OSTI ID: 6245436
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 50:6; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
BACKSCATTERING
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
HOMOGENEOUS PLASMA
INHOMOGENEOUS PLASMA
INSTABILITY
ION ACOUSTIC WAVES
ION WAVES
LASER RADIATION
MAGNETIC FIELDS
PLASMA
PLASMA INSTABILITY
PLASMA WAVES
RADIATIONS
SCATTERING
WAVE PROPAGATION