Magnetic surface mapping with an emissive filament technique on the Auburn Torsatron: Technical report

Technical Report · Wed Oct 01 00:00:00 EDT 1986

OSTI ID:6956853

Gandy, R F; Henderson, M A; Hanson, J D; Hartwell, G J; Swanson, D G

Torsatron and stellarator plasma confinement devices rely on magnetic surface mapping to determine the critical vacuum magnetic field structure. A recently developed method employing an emissive filament offers some advantages over the traditional technique of mapping with a directed electron beam. On the Auburn Torsatron a comparative study between the emissive filament and directed electron beam techniques has been conducted. The parameters varied in the comparative study are: filament geometry, emission current, bias voltage, background gas pressure, and magnetic field strength. This comparative study indicates that the emissive filament technique is reliable over a broad and easily accessible range of parameters. We have also measured the spatial distribution of electrons on a given magnetic surface. As an application of the emissive filament technique, the optimization of the magnetic surfaces on the Auburn Torsatron is shown.

• Research Organization: Auburn Univ., AL (USA). Dept. of Physics
• DOE Contract Number: FG05-85ER53203
• OSTI ID: 6956853
• Report Number(s): DOE/ER/53203-1; ON: DE87003979; TRN: 87-006550
• 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
MAGNETIC SURFACES
MAPPING
TORSATRON STELLARATOR
ELECTRONS
PLASMA CONFINEMENT
SPATIAL DISTRIBUTION
CLOSED PLASMA DEVICES
CONFINEMENT
DISTRIBUTION
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
MAGNETIC FIELD CONFIGURATIONS
STELLARATORS
THERMONUCLEAR DEVICES
700202* - Fusion Power Plant Technology- Magnet Coils & Fields