Absorption of intense electromagnetic radiation in collisions of charged particles

Journal Article · Tue Sep 01 00:00:00 EDT 1981 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:5472641

Silin, V P; Uryupin, S A

An effective collision frequency ..nu..(E) for electrons and ions, which described the absorption of intense radiation with a frequency which exceeds the Langmuir frequency, is found. The amplitude of the electron oscillation velocity v/sub E/ in the radiation field is assumed to exceed the electron thermal velocity v/sub T/. Under these conditions, when the parameter Ze/sup 2//hv/sub E/ of the quantum-mechanical perturbation theory exceeds unity and the energy h..omega.. of the radiation quantum is less than the electron thermal energy kappa-curT, some simple asymptotic classical formulas are derived for the dependence of ..nu..(E) on the radiation frequency and intensity. The role of quantum effects is studied in the case when at least one of the inequalities, h..omega..>kappa-curT or Ze/sup 2//hv/sub E/<1, is fulfilled. Some qualitatively new quantum effects are deduced for linearly polarized radiation in the ranges hv/sub E/>Ze/sup 2/>hv/sub T/ and hv/sub E/> ze/sup 2/> h(h..omega../m)/sup 1/2/ for linearly polarized radiation and in the range Ze/sup 2/>hv/sub E/, h..omega..>kappa-curT for linearly and circularly polarized radiation. These effects, together with the classical dependences derived by us and with the extreme quantum dependences known previously (which hold for THETAv/sub T/>Ze/sup 2/ and THETA(THETA..omega../m)/sup 1/2/>Ze/sup 2/) complete the development of the asymptotic theory of absorption of high frequency radiation in a plasma.

• OSTI ID: 5472641
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 54:3; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
ABSORPTION
AMPLITUDES
ASYMPTOTIC SOLUTIONS
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
IONS
LEPTONS
MECHANICS
PERTURBATION THEORY
PLASMA
POLARIZATION
QUANTUM MECHANICS
RADIATIONS
RADIOWAVE RADIATION
SHORT WAVE RADIATION