Bootstrap current control and the effects of the radial electric field in stellarators [electronic resource].
- Oak Ridge, Tenn. : Oak Ridge National Laboratory, 1989. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 9 : digital, PDF file
- Additional Creators:
- Oak Ridge National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- The effects of the radial electric field E/sub r/ on the bootstrap current in ATF-type configurations are studied with the Drift Kinetic Equation Solver (DKES). It is found that there is a range of E/sub r/ values over which the bootstrap current does not depend on E/sub r/. The effects of E/sub r/ on the bootstrap current are due to the resonance between the parallel velocity and the poloidal E /times/ B drift. The poloidal coil system of a stellarator can be used to modify the /vert bar/B/vert bar/ spectrum and, as a consequence, change the magnitude of the bootstrap current. The addition of a small l = 1 field component to a stellarator field can cancel or reverse the direction of the bootstrap current. It is shown that currentless operation in the collisionless regime is not impaired by the bootstrap current, because the effects of the bootstrap current can be eliminated by an appropriate external coil system. These results can be tested in ATF. 15 refs., 11 figs.
- Published through SciTech Connect., 01/01/1989., "conf-890403-4", "DE89011241", 7. international stellerator workshop, Oak Ridge, TN, USA, 10 Apr 1989., and Carreras, B.A.; Hirshman, S.P.; Lynch, V.E.; Tolliver, J.S.; Shaing, K.C.; Dominguez, N.; van Rij, W.I.; Crume, E.C.
- Funding Information:
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