Buchumschlag

Nonlinear anisotropic equilibrium reconstruction in axisymmetric magnetic mirrors

Fuente: arXiv

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Bibliographische Detailangaben
Hauptverfasser:	Frank, S. J., Agarwal, I., Anderson, J. K., Biswas, B., Claveau, E., Endrizzi, D., Everson, C., Harvey, R. W., Murdock, S., Petrov, Yu. V., Pizzo, J., Qian, T., Sanwalka, K., Shih, K., Sutherland, D. A., Tran, A., Viola, J., Yakovlev, D., Yu, M., Forest, C. B.
Format:	Preprint
Veröffentlicht:	2025
Schlagworte:	Plasma Physics
Online-Zugang:	Acceder al recurso
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_version_	1866910054972653568
author	Frank, S. J. Agarwal, I. Anderson, J. K. Biswas, B. Claveau, E. Endrizzi, D. Everson, C. Harvey, R. W. Murdock, S. Petrov, Yu. V. Pizzo, J. Qian, T. Sanwalka, K. Shih, K. Sutherland, D. A. Tran, A. Viola, J. Yakovlev, D. Yu, M. Forest, C. B.
author_facet	Frank, S. J. Agarwal, I. Anderson, J. K. Biswas, B. Claveau, E. Endrizzi, D. Everson, C. Harvey, R. W. Murdock, S. Petrov, Yu. V. Pizzo, J. Qian, T. Sanwalka, K. Shih, K. Sutherland, D. A. Tran, A. Viola, J. Yakovlev, D. Yu, M. Forest, C. B.
contents	Magnetic equilibrium reconstruction is a crucial simulation capability for interpreting diagnostic measurements of experimental plasmas. Equilibrium reconstruction has mostly been applied to systems with isotropic pressure and relatively low plasma $β= 2μ_0p/B^2$. This work extends nonlinear equilibrium reconstruction to high-$β$ plasmas with anisotropic pressure and applies it to the Wisconsin High Temperature Superconducting Axisymmetric Magnetic Mirror experiments to infer the presence of sloshing ions. A novel basis set for the plasma profiles and machine learning algorithm using scalable constrained Bayesian optimization allow accurate nonlinear reconstructions with uncertainty quantification to be made more quickly with fewer experimental diagnostics and improves the robustness of reconstructions at high $β$. In addition to WHAM and other mirrors, such reconstruction techniques are potentially attractive in high-performance devices with constrained diagnostic capabilities such as fusion power plants.
format	Preprint
id	arxiv_https___arxiv_org_abs_2509_17288
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Nonlinear anisotropic equilibrium reconstruction in axisymmetric magnetic mirrors Frank, S. J. Agarwal, I. Anderson, J. K. Biswas, B. Claveau, E. Endrizzi, D. Everson, C. Harvey, R. W. Murdock, S. Petrov, Yu. V. Pizzo, J. Qian, T. Sanwalka, K. Shih, K. Sutherland, D. A. Tran, A. Viola, J. Yakovlev, D. Yu, M. Forest, C. B. Plasma Physics Magnetic equilibrium reconstruction is a crucial simulation capability for interpreting diagnostic measurements of experimental plasmas. Equilibrium reconstruction has mostly been applied to systems with isotropic pressure and relatively low plasma $β= 2μ_0p/B^2$. This work extends nonlinear equilibrium reconstruction to high-$β$ plasmas with anisotropic pressure and applies it to the Wisconsin High Temperature Superconducting Axisymmetric Magnetic Mirror experiments to infer the presence of sloshing ions. A novel basis set for the plasma profiles and machine learning algorithm using scalable constrained Bayesian optimization allow accurate nonlinear reconstructions with uncertainty quantification to be made more quickly with fewer experimental diagnostics and improves the robustness of reconstructions at high $β$. In addition to WHAM and other mirrors, such reconstruction techniques are potentially attractive in high-performance devices with constrained diagnostic capabilities such as fusion power plants.
title	Nonlinear anisotropic equilibrium reconstruction in axisymmetric magnetic mirrors
topic	Plasma Physics
url	https://arxiv.org/abs/2509.17288