Modeling of LH current drive in self-consistent elongated tokamak MHD equilibria

Conference · Tue May 09 00:00:00 EDT 1989

OSTI ID:6126040

Blackfield, D T; Devoto, R S; Fenstermacher, M E; Bonoli, P T; Porkolab, M; Yugo, J

Calculations of non-inductive current drive typically have been used with model MHD equilibria which are independently generated from an assumed toroidal current profile or from a fit to an experiment. Such a method can lead to serious errors since the driven current can dramatically alter the equilibrium and changes in the equilibrium B-fields can dramatically alter the current drive. The latter effect is quite pronounced in LH current drive where the ray trajectories are sensitive to the local values of the magnetic shear and the density gradient. In order to overcome these problems, we have modified a LH simulation code to accommodate elongated plasmas with numerically generated equilibria. The new LH module has been added to the ACCOME code which solves for current drive by neutral beams, electric fields, and bootstrap effects in a self-consistent 2-D equilibrium. We briefly describe the model in the next section and then present results of a study of LH current drive in ITER. 2 refs., 6 figs., 2 tabs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6126040
• Report Number(s): UCRL-100591; CONF-8905120-14; ON: DE89013263
• Resource Relation: Conference: 8. topical conference on radio frequency power in plasmas, Irvine, CA, USA, 1 May 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TOKAMAK TYPE REACTORS
LOWER HYBRID HEATING
DISPERSION RELATIONS
FOKKER-PLANCK EQUATION
MHD EQUILIBRIUM
RF SYSTEMS
DIFFERENTIAL EQUATIONS
EQUATIONS
EQUILIBRIUM
HEATING
HIGH-FREQUENCY HEATING
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA HEATING
THERMONUCLEAR REACTORS
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production