The divertor structure and particle control in the Interchangeable-Module Stellarator

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5241086

Doerner, R P

The unique modular divertor structure present in the Interchangeable Module Stellarator (IMS) was investigated. The existence of the divertor pattern was confirmed both with an electron-beam mapping apparatus and with plasma operation. The location of the measured diverted particle-flux bundles agree well with the calculated locations of magnetic flux emergence from the coil volume. The particle flux through these divertors is capable of accounting for all the plasma particles created during the duration of an IMS discharged. The edge plasma was modeled using a particle-balance technique. Equating the flux of particles across the last-closed magnetic surface to the flux of particles to the divertors determines a formula for the particle confinement time, which depends only on measurable plasma parameters. Two methods for altering the flow patterns of diverted particles in the edge regions of IMS have been developed. Potentials applied to a defined set of divertor shields in contact with diverted shields in contact with diverted-flux bundles results in redistribution of plasma flow to any given divertor.

• Research Organization: Wisconsin Univ., Madison, WI (USA)
• OSTI ID: 5241086
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700103 -- Fusion Energy-- Plasma Research-- Kinetics
BUNDLE DIVERTORS
CLOSED PLASMA DEVICES
CONFINEMENT TIME
DIVERTORS
MODULAR STRUCTURES
OPERATION
PARTICLE KINEMATICS
POTENTIALS
STELLARATORS
THERMONUCLEAR DEVICES