Multi-region approach to free-boundary three-dimensional tokamak equilibria and resistive wall instabilities
Abstract
Free-boundary 3D tokamak equilibria and resistive wall instabilities are calculated using a new resistive wall model in the two-fluid M3D-C1 code. In this model, the resistive wall and surround- ing vacuum region are included within the computational domain. Our implementation contrasts with the method typically used in fluid codes in which the resistive wall is treated as a boundary condition on the computational domain boundary and has the advantage of maintaining purely local coupling of mesh elements. We use this new capability to simulate perturbed, free-boundary non- axisymmetric equilibria; the linear evolution of resistive wall modes; and the linear and nonlinear evolution of axisymmetric vertical displacement events (VDEs). Calculated growth rates for a resistive wall mode with arbitrary wall thickness are shown to agree well with the analytic theory. Equilibrium and VDE calculations are performed in diverted tokamak geometry, at physically real- istic values of dissipation, and with resistive walls of finite width. Simulations of a VDE disruption extend into the current-quench phase, in which the plasma becomes limited by the first wall, and strong currents are observed to flow in the wall, in the SOL, and from the plasma to the wall.
- Authors:
-
[2];
[1];
- General Atomics, La Jolla, CA (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Rensselaer Polytechnic Inst., Troy, NY (United States)
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1371710
- Alternate Identifier(s):
- OSTI ID: 1254030
- Grant/Contract Number:
- FC02-04ER54698; FG02-95ER54309; AC02-09CH11466; SC0006617
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 23; Journal Issue: 5; 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
Ferraro, N. M., Jardin, S. C., Lao, L. L., Shephard, M. S., and Zhang, F. Multi-region approach to free-boundary three-dimensional tokamak equilibria and resistive wall instabilities. United States: N. p., 2016.
Web. doi:10.1063/1.4948722.
Ferraro, N. M., Jardin, S. C., Lao, L. L., Shephard, M. S., & Zhang, F. Multi-region approach to free-boundary three-dimensional tokamak equilibria and resistive wall instabilities. United States. https://doi.org/10.1063/1.4948722
Ferraro, N. M., Jardin, S. C., Lao, L. L., Shephard, M. S., and Zhang, F. Fri .
"Multi-region approach to free-boundary three-dimensional tokamak equilibria and resistive wall instabilities". United States. https://doi.org/10.1063/1.4948722. https://www.osti.gov/servlets/purl/1371710.
@article{osti_1371710,
title = {Multi-region approach to free-boundary three-dimensional tokamak equilibria and resistive wall instabilities},
author = {Ferraro, N. M. and Jardin, S. C. and Lao, L. L. and Shephard, M. S. and Zhang, F.},
abstractNote = {Free-boundary 3D tokamak equilibria and resistive wall instabilities are calculated using a new resistive wall model in the two-fluid M3D-C1 code. In this model, the resistive wall and surround- ing vacuum region are included within the computational domain. Our implementation contrasts with the method typically used in fluid codes in which the resistive wall is treated as a boundary condition on the computational domain boundary and has the advantage of maintaining purely local coupling of mesh elements. We use this new capability to simulate perturbed, free-boundary non- axisymmetric equilibria; the linear evolution of resistive wall modes; and the linear and nonlinear evolution of axisymmetric vertical displacement events (VDEs). Calculated growth rates for a resistive wall mode with arbitrary wall thickness are shown to agree well with the analytic theory. Equilibrium and VDE calculations are performed in diverted tokamak geometry, at physically real- istic values of dissipation, and with resistive walls of finite width. Simulations of a VDE disruption extend into the current-quench phase, in which the plasma becomes limited by the first wall, and strong currents are observed to flow in the wall, in the SOL, and from the plasma to the wall.},
doi = {10.1063/1.4948722},
journal = {Physics of Plasmas},
number = 5,
volume = 23,
place = {United States},
year = {Fri May 20 00:00:00 EDT 2016},
month = {Fri May 20 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Modelling of NSTX hot vertical displacement events using M3D-C1
journal, May 2018
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Predict-first experimental analysis using automated and integrated magnetohydrodynamic modeling
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Axisymmetric simulations of vertical displacement events in tokamaks: A benchmark of M3D-C 1 , NIMROD, and JOREK
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