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Numerical treatments of fast ion anisotropy and toroidal flow in plasma equilibrium problem

Author: Nikolai N. Gorelenkov
Requested Type: Poster Only
Submitted: 2015-01-19 21:22:34

Co-authors: S. Jardin

Contact Info:
PPPL, Princeton University
PO Box 451
Princeton, NF   08543
USA

Abstract Text:
We present models to solve the plasma equilibrium problem with fast ion anisotropy and/or toroidal flow. These effects are required for recent upgraded tokamak plasmas of NSTX-U or DIII-D where additional NBI are installed. Strongly anisotropic beam ions and plasma rotation have to be addressed for various applications. Both effects can be treated separately and together in various approximations. Anisotropic pressure tensor of fast ions in those models is computed based on a set of basis functions. The proposed models allow the inclusion of finite orbit width effects. We show that in the limit of zero orbit width any distribution function can satisfy the solvability requirements for Grad-Shafranov equation, which follows from the force balance along the magnetic field lines.

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Plasma Properties, Equilibrium, Stability, and Transport