Constructing precisely quasi-isodynamic magnetic fields

Goodman, Alan G.; Mata, K. Camacho; Henneberg, S. A.; Jorge, R.; Landreman, M.; Plunk, G. G.; Smith, H. M.; Mackenbach, R. J. J.; Beidler, C. D.; Helander, P.

doi:10.1017/s002237782300065x

Title: Constructing precisely quasi-isodynamic magnetic fields

Journal Article · 14 September 2023 · Journal of Plasma Physics

DOI: https://doi.org/10.1017/s002237782300065x · OSTI ID:2406036

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Max-Planck-Institut für Plasmaphysik, Greifswald (Germany); University of Maryland
Max-Planck-Institut für Plasmaphysik, Greifswald (Germany)
Universidade de Lisboa (Portugal)
University of Maryland, College Park, MD (United States)
Eindhoven University of Technology (Netherlands)

We present a novel method for numerically finding quasi-isodynamic stellarator magnetic fields with excellent fast-particle confinement and extremely small neoclassical transport. The method works particularly well in configurations with only one field period. We examine the properties of these newfound quasi-isodynamic configurations, including their transport coefficients, particle confinement and available energy for trapped-electron-instability-driven turbulence, as well as the degree to which they change when a finite pressure profile is added. We finally discuss the differences between the magnetic axes of the optimized solutions and their respective initial conditions, and conclude with the prospects for future quasi-isodynamic optimization.

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Research Organization:: University of Maryland, College Park, MD (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); Simons Foundation; Portuguese FCT – Fundação para a Ciência e Tecnologia

Grant/Contract Number:: FG02-93ER54197

OSTI ID:: 2406036

Journal Information:: Journal of Plasma Physics, Journal Name: Journal of Plasma Physics Journal Issue: 5 Vol. 89; ISSN 0022-3778

Publisher:: Cambridge University PressCopyright Statement

Country of Publication:: United States

Language:: English

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Data for paper "Constructing precisely quasi-isodynamic magnetic fields" Goodman, Alan Zenodo https://doi.org/10.5281/zenodo.7313702	dataset	January 2022

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