Theory of sheared flow generation by applied radio frequency waves
- Lodestar Research Corp., 2400 Central Ave. P-5, Boulder, Colorado 80301 (United States)
The possibility of employing rf to generate sheared flows in the edge plasma is of great interest as a means of accessing improved regimes of tokamak confinement. Here, we develop an electromagnetic nonlinear eikonal theory (with k{sub (perpendicular} {sub sign)}{rho}{approx}1 and k/k unrestricted) of the rf force terms which drive poloidal flow. Various cancellations, e.g., amongst parts of the electromagnetic and Reynolds stress terms, are exhibited analytically. At the heart of our calculation is the derivation of the nonlinear kinetic pressure tensor {pi}. A general expression for {pi} is obtained in terms of simple moments of the linear distribution function. In the electrostatic limit, the resulting nonlinear forces are expressible entirely in terms of the linear dielectric susceptibility tensor {chi}. Application to the ion Bernstein wave case, with retention of all Bessel function sums, is presented. Comparison is made to simpler approximate calculations. (c) 1999 American Institute of Physics.
- OSTI ID:
- 20216709
- Journal Information:
- AIP Conference Proceedings, Vol. 485, Issue 1; Other Information: PBD: 20 Sep 1999; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Second-order radio frequency kinetic theory with applications to flow drive and heating in tokamak plasmas
Generalized gyroviscous force and its effect on the momentum balance equation