Joule heating of a current layer due to plasma density inhomogeneities
- Laboratoire de Physique des Milieux Ionises, Ecole Polytechnique, 91128 Palaiseau (France)
- Institute of Nuclear Fusion, Russian Research Center, Kurchatov Institute, 123182, Moscow (Russia)
In the present paper the magnetic field dynamics in the frame of electron magnetohydrodynamics (EMHD) theory is considered in the case of a current passing through a plasma of inhomogeneous density. It is shown: (1) due to the Hall effect the Joule heating of a current layer increases up to ({omega}{tau}){sub {ital ei}} times the Joule heating of ordinary homogeneous plasma. (2) The EMHD magnetic field dynamics can be considered as an enhanced magnetic field diffusion in the frame of MHD theory, using {open_quote}{open_quote}efficient{close_quote}{close_quote} coefficients of plasma conductivity and of magnetic field diffusion. The {open_quote}{open_quote}efficient{close_quote}{close_quote} coefficient of the magnetic field diffusion {ital cT}/10{ital eH} in the case of magnetic field-plasma equilibrium is the same order of magnitude as the Bohm{close_quote}s coefficient {ital cT}/16{ital eH}. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 284287
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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