Absolute dissipative instability of inhomogeneous bounded plasma in radiation field

Journal Article · Mon Nov 01 04:00:00 EST 1976 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:7106193

Gradov, O M; Izmailov, G N

The dissipative instability which occurs in an inhomogeneous plasma as the result of the excitation of longitudinal longwave oscillations by a radiation field is analyzed. Since the noise buildup is due to the excitation of normal modes, the entire plasma volume becomes turbulent, in contrast with the case in which local oscillations are excited. The threshold pump fields found are governed entirely by the dissipation of longitudinal waves due to resonant absorption at the points of conversion into local oscillations. These thresholds are higher than the corresponding values found for a homogeneous bounded plasma, but they are much lower than values calculated in the approximation of a cold plasma, in which the instability involving the growth of longitudinal waves cannot occur unless nonnormal modes are excited. The maximum growth rate of the instability is derived; it is a strong function of dissipative effects over a broad range of fields well above the threshold field.

• OSTI ID: 7106193
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Plasma Phys. (Engl. Transl.); (United States) Vol. 2:6; ISSN SJPPD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107 -- Fusion Energy-- Plasma Research-- Instabilities
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
ABSOLUTE INSTABILITIES
CONVECTIVE INSTABILITIES
HEATING
HIGH-FREQUENCY HEATING
INHOMOGENEOUS PLASMA
INSTABILITY
NORMAL-MODE ANALYSIS
PARAMETRIC INSTABILITIES
PLASMA
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
TURBULENCE