NIMROD Modeling of Quiescent H-mode: Reconstruction Considerations and Saturation Mechanism
| Autor: | K. H. Burrell, A.M. Garofalo, P. B. Snyder, Richard J. Groebner, Alexei Pankin, Scott Kruger, Jacob King |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Nuclear and High Energy Physics Toroidal and poloidal Tokamak Computation FOS: Physical sciences Basis function Condensed Matter Physics 01 natural sciences Physics - Plasma Physics 010305 fluids & plasmas Computational physics law.invention Ion Plasma Physics (physics.plasm-ph) law Physics::Plasma Physics 0103 physical sciences Physics::Space Physics Relaxation (physics) Nimrod Magnetohydrodynamics 010306 general physics |
| DOI: | 10.48550/arxiv.1702.00050 |
| Popis: | The extended-MHD NIMROD code [C.R. Sovinec and J.R. King, J. Comput. Phys. 229, 5803 (2010)] models broadband-MHD activity from a reconstruction of a quiescent H-mode shot on the DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 614 (2002)]. Computations with the reconstructed toroidal and poloidal ion flows exhibit low-n perturbations (n=1-5) that grow and saturate into a turbulent-like MHD state. The workflow used to project the reconstructed state onto the NIMROD basis functions re-solves the Grad-Shafranov equation and extrapolates profiles to include scrape-off-layer currents. Evaluation of the transport from the turbulent-like MHD state leads to a relaxation of the density and temperature profiles. Comment: 8 pages |
| Databáze: | OpenAIRE |
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