Halo plasma heating by neutral beam injection in TMX-U

Journal Article · Wed May 01 00:00:00 EDT 1985 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.573100· OSTI ID:5760421

Hsu, W L; Bauer, W; Kerst, R A; Wilson, K L; Simonen, T C; Foote, J H; Pickles, W L

The electron temperature and density of the halo in TMX-U have been measured by Langmuir probes to study the heating of the halo plasma by neutral beam injection. This study is motivated by the recent interest in using a pair of halo recyclers to enhance the halo density and thereby increase halo shielding. In present TMX-U operation, without halo recyclers, a halo density of 2 x 10/sup 12/ cm/sup -3/ with electron temperature of 20 eV has been measured during the heating phase with neutral beam injection only. A halo power balance model incorporating several heating mechanisms resulting from neutral beam injection is described. The model accurately predicts the measured temperatures. At the halo density range that one expects to achieve with halo recyclers, the model predicts the existing TMX-U neutral beam sources to heat the halo to at least 30 eV.

• Research Organization: Sandia National Laboratories, Livermore, California 94550
• OSTI ID: 5760421
• Journal Information: J. Vac. Sci. Technol., A; (United States), Vol. 3:3
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TMX DEVICES
BEAM INJECTION HEATING
ELECTRON DENSITY
ELECTRON TEMPERATURE
EXPERIMENTAL DATA
LANGMUIR PROBE
NEUTRAL ATOM BEAM INJECTION
BEAM INJECTION
DATA
ELECTRIC PROBES
HEATING
INFORMATION
MAGNETIC MIRRORS
NUMERICAL DATA
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TANDEM MIRRORS
THERMONUCLEAR DEVICES
700205* - Fusion Power Plant Technology- Fuel
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