Computation of lower hybrid, neutral beam and bootstrap currents in consistent MHD equilibria
A possible scenario for steady state current drive in large, high- temperature tokamaks includes current driven by lower hybrid (LH) waves in the outer region with high-energy neutral beams (NB) used for current drive in the core. In addition, provided the poloidal beta is sufficiently high, there can be substantial bootstrap (BS) current, as observed in the TFTR and JET experiments. In work reported previously, a computer code, ACCOME, was written to obtain a solution to the MHD equations which is consistent with current driven by neutral beams, electric fields, and neoclassical (bootstrap) effects. For the computation of the solution to the Grad-Shafranov equation, the SELENE code is used. Iteration is necessary between SELENE and the current-drive computations to obtain a consistent solution. In this paper we describe modifications to ACCOME to enable the computation of LH current in addition to the NB, BS, and OH currents. The next section describes the models used and then the final section presents an application to ITER. 4 refs., 4 figs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6439827
- Report Number(s):
- UCRL-99981; CONF-890302-19; ON: DE89008892
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
BEAM INJECTION HEATING
COMPUTER CALCULATIONS
CONFINEMENT
CURRENT DENSITY
EQUILIBRIUM
HEATING
HIGH-FREQUENCY HEATING
LOWER HYBRID HEATING
MHD EQUILIBRIUM
PLASMA CONFINEMENT
PLASMA HEATING
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS