Optimisation of confinement in a fusion reactor using a nonlinear turbulence model
Abstract
We report the confinement of heat in the core of a magnetic fusion reactor is optimised using a multidimensional optimisation algorithm. For the first time in such a study, the loss of heat due to turbulence is modelled at every stage using first-principles nonlinear simulations which accurately capture the turbulent cascade and large-scale zonal flows. The simulations utilise a novel approach, with gyrofluid treatment of the small-scale drift waves and gyrokinetic treatment of the large-scale zonal flows. A simple near-circular equilibrium with standard parameters is chosen as the initial condition. The figure of merit, fusion power per unit volume, is calculated, and then two control parameters, the elongation and triangularity of the outer flux surface, are varied, with the algorithm seeking to optimise the chosen figure of merit. A twofold increase in the plasma power per unit volume is achieved by moving to higher elongation and strongly negative triangularity.
- Authors:
-
[1];
[2];
[3];
[4]
- Chalmers University of Technology, Gothenburg (Sweden); Rudolph Peierls Centre for Theoretical Physics, Oxford (United Kingdom); Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE)
- Princeton University, NJ (United States)
- Rudolph Peierls Centre for Theoretical Physics, Oxford (United Kingdom)
- University of Maryland, College Park, MD (United States)
- Publication Date:
- Research Org.:
- Krell Institute, Ames, IA (United States); Univ. of Maryland, College Park, MD (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); Euratom Research and Training Programme; European Commission (EC); Swedish Research Council (SRC)
- OSTI Identifier:
- 1538938
- Grant/Contract Number:
- FG02-97ER25308; 633053; 2014–5392
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Plasma Physics
- Additional Journal Information:
- Journal Volume: 84; Journal Issue: 2; Journal ID: ISSN 0022-3778
- Publisher:
- Cambridge University Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; fusion plasma; plasma confinement; plasma simulation
Citation Formats
Highcock, E. G., Mandell, N. R., Barnes, M., and Dorland, W. Optimisation of confinement in a fusion reactor using a nonlinear turbulence model. United States: N. p., 2018.
Web. doi:10.1017/s002237781800034x.
Highcock, E. G., Mandell, N. R., Barnes, M., & Dorland, W. Optimisation of confinement in a fusion reactor using a nonlinear turbulence model. United States. https://doi.org/10.1017/s002237781800034x
Highcock, E. G., Mandell, N. R., Barnes, M., and Dorland, W. Mon .
"Optimisation of confinement in a fusion reactor using a nonlinear turbulence model". United States. https://doi.org/10.1017/s002237781800034x. https://www.osti.gov/servlets/purl/1538938.
@article{osti_1538938,
title = {Optimisation of confinement in a fusion reactor using a nonlinear turbulence model},
author = {Highcock, E. G. and Mandell, N. R. and Barnes, M. and Dorland, W.},
abstractNote = {We report the confinement of heat in the core of a magnetic fusion reactor is optimised using a multidimensional optimisation algorithm. For the first time in such a study, the loss of heat due to turbulence is modelled at every stage using first-principles nonlinear simulations which accurately capture the turbulent cascade and large-scale zonal flows. The simulations utilise a novel approach, with gyrofluid treatment of the small-scale drift waves and gyrokinetic treatment of the large-scale zonal flows. A simple near-circular equilibrium with standard parameters is chosen as the initial condition. The figure of merit, fusion power per unit volume, is calculated, and then two control parameters, the elongation and triangularity of the outer flux surface, are varied, with the algorithm seeking to optimise the chosen figure of merit. A twofold increase in the plasma power per unit volume is achieved by moving to higher elongation and strongly negative triangularity.},
doi = {10.1017/s002237781800034x},
journal = {Journal of Plasma Physics},
number = 2,
volume = 84,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2018},
month = {Mon Apr 23 00:00:00 EDT 2018}
}
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