Direct microstability optimization of stellarator devices
Turbulent transport is regarded as one of the key issues in magnetic confinement nuclear fusion, both for tokamaks and stellarators. In this work, we show that a significant decrease in a microstability-based proxy, as opposed to a geometric one, for the turbulent heat flux, namely the quasilinear heat flux, can be obtained in an efficient manner by coupling stellarator optimization with linear gyrokinetic simulations. This is accomplished by computing the quasilinear heat flux at each step of the optimization process, as well as the deviation from quasisymmetry, and minimizing their sum, leading to a balance between neoclassical and the turbulent transport proxy.
Authors
- Tony Qian (ORCID: https://orcid.org/0000-0002-6536-5399)
- P. Kim (ORCID: https://orcid.org/0000-0003-3201-1831)
- Matt Landreman (ORCID: https://orcid.org/0000-0002-7233-577X)
- Noah Mandell (ORCID: https://orcid.org/0000-0003-1446-5397)
- W. Dorland (ORCID: https://orcid.org/0000-0003-2915-724X)
- R. Jorge (ORCID: https://orcid.org/0000-0003-2941-6571)
- G. Merlo
Institutions
- University of Wisconsin–Madison (US)
- University of Lisbon (PT)
- Princeton Plasma Physics Laboratory (US)
- Instituto Superior Técnico (PT)
- University of Maryland, College Park (US)
- The University of Texas at Austin (US)
Publication Details
- Journal
- Physical review. E
- Published
- 2024-09-03
- DOI
- https://doi.org/10.1103/physreve.110.035201
- Citations
- 9
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 5.28
Funders
- National Science Foundation
- U.S. Department of Energy
- Oak Ridge Associated Universities
- EUROfusion
- European Commission
- Oak Ridge Institute for Science and Education
- Euratom Research and Training Programme
- Fundação para a Ciência e a Tecnologia
- Fusion Energy Sciences