Confinement and heating of high beta plasmas with emphasis on compact toroids: Task 2, Stellarator and heliac research: Annual report, October 1, 1985-September 30, 1986

Technical Report · Wed Dec 31 00:00:00 EST 1986

OSTI ID:7014512

Ribe, F L

Progress over the past year has enabled us to complete the comprehensive experimental investigation of the equilibrium and stability of the linear heliac and the linear l = 1 stellarator configration. In the case of the heliac work, we discoverd axisymmetric hot plasma near the axial conductor (''hardcore'') in amounts which are comparable to the helically symmetric hot plasma centered on the magnetic axis. From this result came the motivation for an extended investigation which concentrates on the details of high-beta heliac formation. Important first results of the formation study have been obtained. In the case of the stellarator work, we have observed the flute-like m = 1 instability foe a specific set of experimental parameters and, for a different set, we have observed the mode stabilized by the combined effects of a finite ion Larmor radius and a nearby conducting wall. The single-discharge CV ion-temperature diagnostic system has been debugged and has yielded a heliac temperature measurement of (90 +- 10)eV. The plasma density diagnostic system based on cross-tube interferometry has been modified from its previous design for use with the somewhat wrinkly helical discharge tube.

• Research Organization: Washington Univ., Seattle (USA). Dept. of Nuclear Engineering
• DOE Contract Number: AT06-72ET53047
• OSTI ID: 7014512
• Report Number(s): DOE/ET/53047-25; ON: DE87005554
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPACT TORUS
PLASMA CONFINEMENT
PLASMA HEATING
STELLARATORS
HIGH-BETA PLASMA
INTERFEROMETRY
PLASMA DIAGNOSTICS
CLOSED PLASMA DEVICES
CONFINEMENT
HEATING
PLASMA
THERMONUCLEAR DEVICES
TORI
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production