Abstract Details
Abstracts
Author: Vladimir A Svidzinski
Requested Type: Poster
Submitted: 2017-03-23 16:41:45
Co-authors: J.S.Kim, J.A.Spencer, L.Zhao, S.A.Galkin
Contact Info:
FAR-TECH, Inc.
10350 Science Center Dr, Ste 1
San Diego, CA 92121
USA
Abstract Text:
Full wave simulation tool, modeling RF fields in hot inhomogeneous magnetized plasma, is being developed. The wave equations with linearized hot plasma dielectric response are solved in configuration space on adaptive cloud of computational points. The nonlocal hot plasma dielectric response is formulated in configuration space without limiting approximations by numerically calculating the plasma conductivity kernel based on the solution of the linearized Vlasov equation in inhomogeneous magnetic field [1].
Discretization of wave equations on adaptive grid in configuration space allows for better resolution of plasma resonances, antenna structures and complex boundaries. Plasma core and scrape-off regions in fusion devices are modeled within the same formulation. In fusion devices the hot plasma dielectric response on an RF field is concentrated near the magnetic field line passing through the test point. In many cases such response is limited to distances of a few particle’s Larmor radii. The localized structure of the plasma dielectric response results in a sparse matrix of the discretized problem, significantly reducing the size of the problem and making simulations faster.
The details of the new simulation tool and results of the full wave modeling will be presented, including: construction of the finite differences for approximation of derivatives on adaptive cloud of computational points; model and results of nonlocal conductivity kernel calculation in tokamak geometry; results of 2-D full wave simulations in the cold plasma model in tokamak geometry using the formulated approach; results of self-consistent simulations of 2-D RF fields in tokamak using the calculated hot plasma conductivity kernel.
[1] V. A. Svidzinski, J. S. Kim, J. A. Spencer, L. Zhao, S. A. Galkin, and E. G. Evstatiev, Phys. Plasmas 23, 112101 (2016)
This work is supported by the DOE SBIR program, Grant No. DE-SC0011863
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