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Author Garabedian, P. ♦ Ku, L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ STELLARATORS ♦ TOKAMAK DEVICES ♦ PLASMA CONFINEMENT ♦ FEASIBILITY STUDIES ♦ BALLOONING INSTABILITY ♦ HIGH-BETA PLASMA ♦ MEDIUM-BETA PLASMA
Abstract Compact hybrid configurations with two field periods have been studied recently as candidates for a proof of principle experiment at the Princeton Plasma Physics Laboratory. This project has led us to the discovery of a family of quasiaxially symmetric stellarators with three field periods that have significant advantages, although their aspect ratios are a little larger. They have reversed shear and perform better in a local analysis of ballooning modes. Nonlinear equilibrium and stability calculations predict that the average beta limit will be at least as high as 4{percent} if the bootstrap current turns out to be as big as that expected in comparable tokamaks. The concept relies on a combination of helical fields and bootstrap current to achieve adequate rotational transform at low aspect ratio. {copyright} {ital 1999 American Institute of Physics.}
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-03-01
Publisher Place United States
Journal Physics of Plasmas
Volume Number 6
Issue Number 3


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