Computer simulation of lower hybrid heating and current drive in tokamaks. Final report

Technical Report · Sat Dec 31 23:00:00 EST 1983

OSTI ID:5144451

Ogden, J M

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
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
CLOSED PLASMA DEVICES
COMPUTER CODES
COMPUTERIZED SIMULATION
CURRENT-DRIVE HEATING
ELECTRIC HEATING
ELECTRON DENSITY
HEATING
HIGH-FREQUENCY HEATING
JOULE HEATING
L CODES
LOWER HYBRID HEATING
PLASMA HEATING
PLT DEVICES
QUASILINEAR PROBLEMS
RESISTANCE HEATING
SIMULATION
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TOKAMAK TYPE REACTORS