Absolute parametric instabilities in inhomogeneous plasmas

Journal Article · Mon Aug 15 04:00:00 EDT 1983 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.51.574· OSTI ID:5650003

Picard, G; Johnston, T W

For one-dimensional three-wave parametric instabilities with oppositely directed group velocities for the decay waves in unbounded plasmas, it is known that for uniform coupling amplitude and constant wave-vector mismatch (dsummationk/sub i//dx = const) there cannot be an absolute instability. It is shown that this is an exceptional case, and that in general an absolute instability can be obtained in an inhomogeneous plasma with a sufficiently strong pump. A simple criterion is given for the threshold of the absolute instability.

• Research Organization: Institut National de la Recherche Scientifique Energie, Universite du Quebec, Varennes, Quebec J0L2P0, Canada
• OSTI ID: 5650003
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 51:7; ISSN PRLTA
• 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
COUPLING
DATA
INFORMATION
INHOMOGENEOUS PLASMA
INSTABILITY
INSTABILITY GROWTH RATES
NUCLEAR REACTIONS
NUCLEOSYNTHESIS
NUMERICAL DATA
ONE-DIMENSIONAL CALCULATIONS
PARAMETRIC INSTABILITIES
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA WAVES
THEORETICAL DATA
THERMONUCLEAR REACTIONS
WAVE PROPAGATION