Theoretical studies on plasma heating and confinement
Three principal topics are covered in this final report: Stabilization of low frequency modes of an axisymmetric compact torus plasma confinement system, such as, spheromaks and FRC'S, by a population of large orbit axis encircling energetic ions. Employing an extension of the energy principle' which utilizes a Vlasov description for the energetic 'ion component, it has been demonstrated that short wavelength MHD type modes are stabilized while the long wavelength tilt and precessional modes are marginally stable. The deformation of the equilibrium configuration by the energetic ions results in the stabilization of the tilt mode for spheromaks. Formation of Ion Rings and their coalescence with spheromaks. A two dimensional electromagnetic PIC codes has been developed for the study of ion ring formation and its propagation, deformation and slowing down in a cold plasma. It has been shown that a ring moving at a speed less than the Alfven velocity can merge with a stationary spheromak. Anomalous transport from drift waves in a Tokomak. The Direct Interaction Approximation in used to obtain incremental transport coefficients for particles and heat for drift waves in a Tokomak. It is shown that the transport matrix does not obey Onsager's principle.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
- DOE Contract Number:
- Resource Type:
- Technical Report
- Research Org:
- Cornell Univ., Ithaca, NY (United States)
- Sponsoring Org:
- DOE; USDOE, Washington, DC (United States)
- Country of Publication:
- United States
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA CONFINEMENT; RESEARCH PROGRAMS; MHD EQUILIBRIUM; PLASMA HEATING; PLASMA INSTABILITY; PLASMA SIMULATION; PROGRESS REPORT; SPHEROMAK DEVICES; TOKAMAK DEVICES; TRANSPORT THEORY; TURBULENCE; CLOSED PLASMA DEVICES; CONFINEMENT; DOCUMENT TYPES; EQUILIBRIUM; HEATING; INSTABILITY; SIMULATION; THERMONUCLEAR DEVICES 700310* -- Plasma Confinement-- (1992-); 700330 -- Plasma Kinetics, Transport, & Impurities-- (1992-)
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