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approvedlez_170314.pdf2017-03-15 08:41:55Leonid Zakharov

Abstracts

Author: Leonid E Zakharov
Requested Type: Pre-Selected Invited
Submitted: 2017-03-15 09:47:25

Co-authors: Nikolai Gorelenkov

Contact Info:
LiWFusion
PO Box 2391
Princeton, NJ   08543
USA

Abstract Text:
The development of HPE code addresses the needs for accurate
evaluation of the effects of plasma toroidal rotation and anisotropic
pressure generated by NBI on tokamak equilibrium. These effects are
becoming increasingly important after the upgrades of DIII-D and NSTX
machines in the US where the equilibrium is expected to change
significantly. One of important novel elements of the presented
formulation is the finite width of the fast ions drift orbits.
HPE adopts the equilibrium equations which include the Mach number radial profile for plasma rotation, parallel pressure of the hot particles and anisotropy parameter, isotropic plasma pressure and q-profile.

At present, the mono-energetic hot particle model of the parallel
pressure is implemented in HPE in the novel form determined by two input profiles determining pitch angle and radial distributions of fast ions.At the same time, the equilibrium solver of HPE is
designed for arbitrary specification of plasma aisotropy.
Note, that the ``q-solver'' regime of HPE, taken from the ESC code, provides the same sub-second convergence on 3-5 iterations as for the standard right-hand-side of the Grad-Shafranov equation

Examples of the equilibrium of NSTX-U like plasmas will be shown
emphasizing the effects of anisotropy and rotation.

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