Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Antoine Cerfon"'
Publikováno v:
Physics of Plasmas. 30:042511
We present a robust optimization algorithm for the design of electromagnetic coils that generate vacuum magnetic fields with nested flux surfaces and precise quasi-symmetry. The method is based on a bilevel optimization problem, where the outer coil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd307d41a785eb0fa0c04b4347950cd9
https://doi.org/10.1063/5.0129716
https://doi.org/10.1063/5.0129716
Autor:
Antoine Cerfon, Geoffrey McFadden, Jon Wilkening, Jungpyo Lee, Tonatiuh Sanchez-Vizuet, Lise-Marie Imbert-Gérard, Dhairya Malhotra, Lee Ricketson, Martin Greenwald, Matt Landreman, Jeffrey Freidberg, Mike O'Neil, Felix Parra, Manas Rachh, Travis Askham, Eugenia Kim, Dan Segal, Justin Ball, Di Qi, Andrew Majda
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad145b993a805de25aa43884c72266f3
https://doi.org/10.2172/1856740
https://doi.org/10.2172/1856740
Publikováno v:
Proceedings of the National Academy of Sciences. 119
Magnetic fields with quasi-symmetry are known to provide good confinement of charged particles and plasmas, but the extent to which quasi-symmetry can be achieved in practice has remained an open question. Recent work [M. Landreman and E. Paul, Phys.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ba1c1cf88b16029b5350a26868d8e10
https://doi.org/10.1073/pnas.2202084119
https://doi.org/10.1073/pnas.2202084119
We propose a new method to compute magnetic surfaces that are parametrized in Boozer coordinates for vacuum magnetic fields. We also propose a measure for quasisymmetry on the computed surfaces and use it to design coils that generate a magnetic fiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92d003ae247ebe0d22c49d49c6cc5cbf
http://arxiv.org/abs/2203.03753
http://arxiv.org/abs/2203.03753
Stochastic and a posteriori optimization to mitigate coil manufacturing errors in stellarator design
It was recently shown in Wechsung et al (2022 Proc. Natl Acad. Sci. USA 119 e2202084119) that there exist electromagnetic coils that generate magnetic fields, which are excellent approximations to quasi-symmetric fields and have very good particle co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dea2f1ed7ff707796e8b71edee1e2a79
Publikováno v:
Nuclear Fusion. 62:076034
We extend the single-stage stellarator coil design approach for quasi-symmetry on axis from (Giuliani et al 2020) to additionally take into account coil manufacturing errors. By modeling coil errors independently from the coil discretization, we have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1291ade5eeab886ba4fdf84826853ce
https://doi.org/10.1088/1741-4326/ac45f3
https://doi.org/10.1088/1741-4326/ac45f3
Publikováno v:
Nuclear Fusion. 62:076019
In the design of stellarators, energetic particle confinement is a critical point of concern which remains challenging to study from a numerical point of view. Standard Monte Carlo (MC) analyses are highly expensive because a large number of particle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cff366f8e5eec682e9694ae6b035083d
https://doi.org/10.1088/1741-4326/ac4777
https://doi.org/10.1088/1741-4326/ac4777
We present a new coil design paradigm for magnetic confinement in stellarators. Our approach directly optimizes coil shapes and coil currents to produce a vacuum quasi-symmetric magnetic field with a target rotational transform on the magnetic axis.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edc3d23e34b60dc522675564cb669910
http://arxiv.org/abs/2010.02033
http://arxiv.org/abs/2010.02033
Autor:
Jungpyo Lee, Antoine Cerfon
Publikováno v:
Plasma Physics & Controlled Fusion; Oct2019, Vol. 61 Issue 10, p1-1, 1p
Publikováno v:
Nuclear Fusion; May2017, Vol. 57 Issue 6, p1-1, 1p