Computer simulation of lower hybrid heating and current drive in tokamaks. Final report
A computer code LHRAY has been developed for modelling lower hybrid wave propagation, absorption and current drive in tokamaks. LHRAY has been designed to run either as a stand-alone program with fixed plasma profiles or as an addition to an OLYMPUS style 1-D tokamak transport code. We assume an input rf power spectrum given by Brambilla theory. The spectrum is broken up into a number of discrete modes, which are followed as they propagate in the tokamak using the toroidal ray equations. The waves interact non-linearly with the electrons as they travel through the plasma, flattening the electron velocity space distribution and driving current. The electron distribution function is computed using a 1-D quasilinear model similar to that of Fisch. Relativistic effects and the presence of a background Ohmic electric field are also included. From the electron distribution function the quasilinear wave damping and electron current are calculated self-consistently. Simulation results give a fairly good prediction (to within approx. = 30%) of the steady state lower hybrid current driven in PLT experiments.
- Research Organization:
- Ogden (Joan M.), Princeton, NJ (USA)
- DOE Contract Number:
- AC02-82ER53132
- OSTI ID:
- 5144451
- Report Number(s):
- DOE/ER/53132-3; ON: DE84008667
- Resource Relation:
- Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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Numerical modeling of lower hybrid heating and current drive
Numerical modeling of lower hybrid heating and current drive
Related Subjects
COMPUTER CODES
L CODES
CURRENT-DRIVE HEATING
COMPUTERIZED SIMULATION
LOWER HYBRID HEATING
TOKAMAK DEVICES
ELECTRON DENSITY
PLT DEVICES
QUASILINEAR PROBLEMS
CLOSED PLASMA DEVICES
ELECTRIC HEATING
HEATING
HIGH-FREQUENCY HEATING
JOULE HEATING
PLASMA HEATING
RESISTANCE HEATING
SIMULATION
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production