Calculation of the poloidal ambipolar field in a stellarator and its effect on transport

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.864867· OSTI ID:6565847

Mynick, H E

The portion Phi/sub 1/ of the ambipolar potential Phi which produces an electric field in the flux surfaces of a stellarator is self-consistently calculated, and its effect on stellarator transport at low collisionality is considered. The effect is small in a parameter delta/sub h/, which is proportional to the square root of the ripple amplitude, epsilon/sub h/. However, since delta/sub h/ can be an appreciable fraction of 1 for realistic parameters, the effect of Phi/sub 1/ on transport can also be appreciable. Whether the effect is harmful or beneficial to confinement depends on the degree of pressure anisotropy and on the sign of p/sub perpendicular/-p/sub parallel/.

• Research Organization: Torsatron/Stellarator Laboratory, University of Wisconsin, Madison, Wisconsin 53706
• DOE Contract Number: AC02-78ET53082
• OSTI ID: 6565847
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 27:8; ISSN PFLDA
• Country of Publication: United States
• Language: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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AMBIPOLAR DIFFUSION
ANNULAR SPACE
CLOSED PLASMA DEVICES
COLLISIONAL PLASMA
CONFIGURATION
CONFINEMENT
DIFFUSION
ELECTRIC FIELDS
ELECTRIC POTENTIAL
MAGNETIC FLUX
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PLASMA CONFINEMENT
SPACE
STELLARATORS
THERMONUCLEAR DEVICES
TOROIDAL CONFIGURATION