Unified fluid/kinetic description of magnetized plasmas

Technical Report · Mon Jul 01 04:00:00 EDT 1991

DOI:https://doi.org/10.2172/5370542· OSTI ID:5370542

Chang, Zuoyang; Callen, J D

The unified fluid/kinetic equations developed in part 1 of this work are used to study plasma drift type microinstabilities. A generalized perturbed Ohm's law derived which is uniformly valid for arbitrary collisionality {omega}/{nu} and adiabaticity {omega}/k{parallel}{upsilon}{sub t}. For electron drift waves we demonstrate that the collisional and collisionless drift wave instabilities can be uniformly described by replacing the Spitzer resistivity with a generalized pseudo-resistivity. Similarly, for ion drift type modes we obtain a uniformly valid dispersion relation for the ion temperature gradient modes ({eta}{sub i} modes). The {eta}{sub i} threshold as a function of ion-ion collisionality and ion Landau damping strength is addressed. Applying the unified equations to electron electromagnetic modes leads to generalized coupled equations for {tilde {phi}} and {tilde A}{parallel} which include electron Landau damping effects and are valid for any {omega}/{nu}. It is shown that the semi-collisional micro-tearing and drift-tearing modes of Drake and Lee can be easily reproduced in the appropriate limit. Generalization of the two-field Hasegawa-Wakatani turbulent equations to include electron temperature fluctuations and linear Landau damping effects is also discussed. Finally, a new method is presented to facilitate the study of magnetic trapped particle modes using our kinetic closure procedure. It is found that by including the trapped particle effects in the closure relations, the usual separation of the fluid equations into trapped and untrapped components becomes unnecessary. 24 refs., 2 figs., 1 tab.

• Research Organization: Wisconsin Univ., Madison, WI (United States). Center for Plasma Theory and Computation
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-86ER53218
• OSTI ID: 5370542
• Report Number(s): UW-CPTC-91-10; ON: DE91018263
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103 -- Fusion Energy-- Plasma Research-- Kinetics
700107* -- Fusion Energy-- Plasma Research-- Instabilities
DAMPING
EQUATIONS
FLUCTUATIONS
INSTABILITY
ION TEMPERATURE
KINETIC EQUATIONS
LANDAU DAMPING
NONLINEAR PROBLEMS
OHM LAW
PLASMA DRIFT
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
TEARING INSTABILITY
TEMPERATURE GRADIENTS
TRAPPED-PARTICLE INSTABILITY
TURBULENCE
USES
VARIATIONS