Adverse consequences of a moving vacuum-plasma boundary on axisymmetric ac helicity injection

Journal Article · Mon Nov 10 04:00:00 EST 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.57.2383· OSTI ID:6680843

Bellan, P M

The recent prediction of Liewer, Gould, and Bellan that a moving plasma-vacuum boundary significantly lowers the effectiveness of ac helicity injection is generalized by resolution of the apparent discrepancy between the helicity-conservation equations of Jensen and Chu and of Moffatt. It is shown that, if there are axisymmetric circular flux surfaces and a moving vacuum-plasma boundary, the helicity injected by oscillating fields (if net injection occurs) is simply consumed by an increase in helicity dissipation due to the same oscillating fields.

• Research Organization: California Institute of Technology, Pasadena, California 91125
• OSTI ID: 6680843
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 57:19; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ASYMMETRY
BOUNDARY LAYERS
ENERGY LOSSES
EXPANSION
HEATING
HELICITY
LAYERS
LOSSES
MAGNETIC FLUX
NONLINEAR PROBLEMS
PARTICLE PROPERTIES
PLASMA
PLASMA EXPANSION
PLASMA HEATING
VACUUM SYSTEMS