Calculating RF current condensation with consistent ray-tracing and island heating
Abstract
Finally, by exploiting the nonlinear amplification of the power deposition of RF waves, current condensation promises new pathways to the stabilization of magnetic islands. We present a numerical analysis of current condensation, coupling a geometrical optics treatment of wave propagation and damping to a thermal diffusion equation solver in the island. Taking into account the island geometry and relativistic damping, previous analytical theory can be made more precise and specific scenarios can be realistically predicted. With this more precise description, bifurcations and associated hysteresis effects could be obtained in an ITER-like scenario at realistic parameter values. Moreover, it is shown that dynamically varying the RF wave launching angles can lead to hysteresis and help to avoid the nonlinear shadowing effect.
- Authors:
-
[1];
[1];
[1];
[2];
[1]
- Princeton Univ., NJ (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1660935
- Alternate Identifier(s):
- OSTI ID: 1657281
- Grant/Contract Number:
- AC02-09CH11466; SC0016072
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 9; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Nies, R., Reiman, A. H., Rodriguez, E., Bertelli, N., and Fisch, N. J. Calculating RF current condensation with consistent ray-tracing and island heating. United States: N. p., 2020.
Web. doi:10.1063/5.0013573.
Nies, R., Reiman, A. H., Rodriguez, E., Bertelli, N., & Fisch, N. J. Calculating RF current condensation with consistent ray-tracing and island heating. United States. https://doi.org/10.1063/5.0013573
Nies, R., Reiman, A. H., Rodriguez, E., Bertelli, N., and Fisch, N. J. Tue .
"Calculating RF current condensation with consistent ray-tracing and island heating". United States. https://doi.org/10.1063/5.0013573. https://www.osti.gov/servlets/purl/1660935.
@article{osti_1660935,
title = {Calculating RF current condensation with consistent ray-tracing and island heating},
author = {Nies, R. and Reiman, A. H. and Rodriguez, E. and Bertelli, N. and Fisch, N. J.},
abstractNote = {Finally, by exploiting the nonlinear amplification of the power deposition of RF waves, current condensation promises new pathways to the stabilization of magnetic islands. We present a numerical analysis of current condensation, coupling a geometrical optics treatment of wave propagation and damping to a thermal diffusion equation solver in the island. Taking into account the island geometry and relativistic damping, previous analytical theory can be made more precise and specific scenarios can be realistically predicted. With this more precise description, bifurcations and associated hysteresis effects could be obtained in an ITER-like scenario at realistic parameter values. Moreover, it is shown that dynamically varying the RF wave launching angles can lead to hysteresis and help to avoid the nonlinear shadowing effect.},
doi = {10.1063/5.0013573},
journal = {Physics of Plasmas},
number = 9,
volume = 27,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 2020},
month = {Tue Sep 01 00:00:00 EDT 2020}
}
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