Radio frequency breakdown and electron confinement time in a stellarator

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.865625· OSTI ID:5920474

Wroblewski, D; Shohet, J L

Radio frequency ( f = 350 kHz) inductive breakdown has been studied in a toroidal stellarator. The time delay between the application of the radio frequency pulse and the buildup of detectable plasma density is measured as a function of the discharge parameters. It is shown that the confinement time of energetic electrons (approx.100 eV), produced during the breakdown, may be deduced from the breakdown characteristics. The experimentally determined confinement times are compared with predictions of neoclassical transport theory and are found to have functional dependence on the discharge parameters approximately consistent with plateau scaling, but to be shorter than predicted by the neoclassical diffusion model.

• Research Organization: The University of Wisconsin, Torsatron/Stellarator Laboratory, Madison, Wisconsin 53706
• DOE Contract Number: AC02-84ER53166
• OSTI ID: 5920474
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 29:6; 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
700106 -- Fusion Energy-- Plasma Research-- Plasma Production-- (-1987)
ANNULAR SPACE
BREAKDOWN
CLASSICAL MECHANICS
CLOSED PLASMA DEVICES
CONFIGURATION
CONFINEMENT
ELECTRIC DISCHARGES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
EV RANGE
FERMIONS
FREQUENCY RANGE
HIGH-FREQUENCY DISCHARGES
INDUCTION
KHZ RANGE
KHZ RANGE 100-1000
LEPTONS
MECHANICS
PLASMA CONFINEMENT
PLASMA DENSITY
PLASMA PRODUCTION
PULSES
RADIATIONS
RADIOWAVE RADIATION
SPACE
STELLARATORS
THERMONUCLEAR DEVICES
TOROIDAL CONFIGURATION