Heating of a toroidal plasma by a nonuniform radio frequency field

Journal Article · Sat Nov 01 04:00:00 EST 1980 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.862925· OSTI ID:6802267

Amagishi, Y; Hirose, A; Skarsgard, H M

Nonuniform electric fields created by an oscillating (1.8 MHz) dipole magnetic field are applied to a preformed, argon plasma in a torus with major radius R=19 cm, minor radius a=2.5 cm, and a toroidal magnetic field B/sub a/=0.3 T. The induced rf plasma current flows in opposite toroidal directions in the outer (larger major radius) and inner regions of the plasma. Spatially and temporally resolved measurements are made of the electron density and temperature as well as the induced electric field and current density. Heating of both the electrons and the ions is observed. Maximum temperatures T/sub e/approx.100 eV and t..-->..T/sub i/approx.35 eV are found at a density of 10/sup 18/ m/sup -3/. Rapid electron heat conduction toward the plasma center occurs, with a characteristic time of several ..mu..sec. The ion heating rate correlates with the growth rate for ion acoustic waves, calculated from measured plasma parameters.

• Research Organization: Physics Department, University of Saskatchewan, Saskatoon, Canada S7N 0W0
• OSTI ID: 6802267
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 23:11; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ANNULAR SPACE
ARGON
CHARGED PARTICLES
CONFIGURATION
DIAMAGNETISM
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FLUIDS
GASES
HEATING
HIGH-FREQUENCY HEATING
ION ACOUSTIC WAVES
ION WAVES
IONS
LEPTONS
MAGNETIC FIELDS
MAGNETISM
MEASURING INSTRUMENTS
NONMETALS
PLASMA
PLASMA DIAMAGNETISM
PLASMA HEATING
PLASMA WAVES
PROBES
RARE GASES
SPACE
SPECTROMETERS
TOROIDAL CONFIGURATION