Theoretical studies on plasma heating and confinement. Progress report, 16 October 1976--15 October 1977. [Stability of ion ring in background plasma] [electronic resource].
- Ithaca, N.Y. : Cornell University. Laboratory of Plasma Studies, 1977. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
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- Pages: 51 : digital, PDF file
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- Cornell University. Laboratory of Plasma Studies and United States. Department of Energy. Office of Scientific and Technical Information
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- Free-to-read Unrestricted online access
- The high frequency (..omega.. much greater than ..cap omega../sub i/) flute-like electrostatic normal modes are found for a long thin field-reversed ion ring immersed in a much denser, colder, uniform background plasma. Instabilities of the weak beam type are found at frequencies somewhat above the lower hybrid frequency. For a sufficiently high energy, low density beam (not difficult to satisfy with reasonable beam and plasma parameters), most of these modes are stabilized by electron cyclotron damping near the surface of field reversal. A few unstable modes remain, localized near the center of the beam. The growth rate of these modes is lower for higher beam energies, fatter rings, and greater degrees of field-reversal. For reasonable parameters, the maximum growth rate can be as low as a fraction of one percent of the ion cyclotron frequency. These remaining modes may be stable if the background plasma is nonuniform or if the ring is not long and thin.
- Published through SciTech Connect., 01/01/1977., "coo-3170-6", and Not Available.
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