Electrostatic heat flux instabilities
- 1 August 1978
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Plasma Physics
- Vol. 20 (1), 47-60
- https://doi.org/10.1017/s0022377800021358
Abstract
The linear Vlasov dispersion relation for electrostatic waves in a homogeneous plasma is studied for instabilities driven by an electron heat flux. A two Maxwellian model of the electron distribution function gives rise to three unstable modes: the electron beam, ion-acoustic and ion cyclotron heat flux instabilities. At large Te/Ti the ion-acoustic instability has the lowest threshold; at small Te/Ti the electron beam instability is dominant; and at intermediate values of Te/Ti the ion cyclotron mode is the first to go unstable. The presence of a high energy tail on the electron distribution function raises the value of the dimensionless heat flux qe/(nemev3e) at the ion-acoustic threshold, but increasing atomic number of the ions decreases this value.Keywords
This publication has 21 references indexed in Scilit:
- Observation of Severe Heat-Flux Limitation and Ion-Acoustic Turbulence in a Laser-Heated PlasmaPhysical Review Letters, 1977
- Efficient Light Absorption by Ion-Acoustic Fluctuations in Laser-Produced PlasmasPhysical Review Letters, 1977
- Whistler heat flux instability in the solar wind with bi-Lorentzian velocity distribution functionsJournal of Geophysical Research, 1977
- Energy flux limitation by ion acoustic turbulence in laser fusion schemesPhysics of Fluids, 1977
- Theory of anomalous energy flux and deposition in a laser produced plasmaPhysics of Fluids, 1976
- Propagation of Ion-Acoustic Waves in a Two-Electron-Temperature PlasmaPhysical Review Letters, 1975
- Solar wind electronsJournal of Geophysical Research, 1975
- Indications of Strongly Flux-Limited Electron Thermal Conduction in Laser-Target ExperimentsPhysical Review Letters, 1975
- Solar wind heat transport in the vicinity of the Earth's bow shockJournal of Geophysical Research, 1973
- Topside current instabilitiesJournal of Geophysical Research, 1971