Piecewise Omnigenous Stellarators

Velasco, J. L.; Calvo, I.; Escoto, F. J.; Sánchez, E.; Thienpondt, H.; Parra, F. I.

doi:10.1103/physrevlett.133.185101

Title: Piecewise Omnigenous Stellarators

Journal Article · 30 October 2024 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.133.185101 · OSTI ID:2475674

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Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain). Laboratorio Nacional de Fusion
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

In omnigenous magnetic fields, charged particles are perfectly confined in the absence of collisions and turbulence. For this reason, the magnetic configuration is optimized to be close to omnigenity in any candidate for a stellarator fusion reactor. However, approaching omnigenity imposes severe constraints on the spatial variation of the magnetic field. In particular, the topology of the contours of constant magnetic field strength on each magnetic surface must be such that there are no particles transitioning between different types of wells. This, in turn, usually leads to complicated plasma shapes and coils. This Letter presents a new family of optimized fields that display tokamak-like collisional energy transport while having transitioning particles. This result radically broadens the space of accessible reactor-relevant configurations.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: European Commission; Ministerio de Ciencia, Innovacion y Universidades, Spain; USDOE

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 2475674

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 133; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (42)

Optimization activities on design studies of LHD-type reactor FFHR Sagara, A.; Mitarai, O.; Tanaka, T. Fusion Engineering and Design, Vol. 83, Issue 10-12 https://doi.org/10.1016/j.fusengdes.2008.07.029	journal	December 2008
Direct construction of optimized stellarator shapes. Part 3. Omnigenity near the magnetic axis Plunk, Gabriel G.; Landreman, Matt; Helander, Per Journal of Plasma Physics, Vol. 85, Issue 6 https://doi.org/10.1017/S002237781900062X	journal	November 2019
Stellarator equilibria with reactor relevant energetic particle losses Bader, Aaron; Drevlak, M.; Anderson, D. T. Journal of Plasma Physics, Vol. 85, Issue 5 https://doi.org/10.1017/S0022377819000680	journal	October 2019
Advancing the physics basis for quasi-helically symmetric stellarators Bader, A.; Faber, B. J.; Schmitt, J. C. Journal of Plasma Physics, Vol. 86, Issue 5 https://doi.org/10.1017/S0022377820000963	journal	October 2020
Direct construction of stellarator-symmetric quasi-isodynamic magnetic configurations Camacho Mata, Katia; Plunk, Gabriel G.; Jorge, Rogerio Journal of Plasma Physics, Vol. 88, Issue 5 https://doi.org/10.1017/S0022377822000812	journal	October 2022
A single-field-period quasi-isodynamic stellarator Jorge, R.; Plunk, G. G.; Drevlak, M. Journal of Plasma Physics, Vol. 88, Issue 5 https://doi.org/10.1017/S0022377822000873	journal	September 2022
Finite orbit width effects in large aspect ratio stellarators d'Herbemont, Vincent; Parra, Felix I.; Calvo, Iván Journal of Plasma Physics, Vol. 88, Issue 5 https://doi.org/10.1017/S0022377822000897	journal	October 2022
Mapping the space of quasisymmetric stellarators using optimized near-axis expansion Landreman, Matt Journal of Plasma Physics, Vol. 88, Issue 6 https://doi.org/10.1017/S0022377822001258	journal	December 2022
Constructing precisely quasi-isodynamic magnetic fields Goodman, A. G.; Camacho Mata, K.; Henneberg, S. A. Journal of Plasma Physics, Vol. 89, Issue 5 https://doi.org/10.1017/S002237782300065X	journal	September 2023
Magnetic fields with general omnigenity Dudt, Daniel W.; Goodman, Alan G.; Conlin, Rory Journal of Plasma Physics, Vol. 90, Issue 1 https://doi.org/10.1017/S0022377824000151	journal	February 2024
Demonstration of reduced neoclassical energy transport in Wendelstein 7-X Beidler, C. D.; Smith, H. M.; Alonso, A. Nature, Vol. 596, Issue 7871 https://doi.org/10.1038/s41586-021-03687-w	journal	August 2021
Stochastic diffusion of energetic ions in optimized stellarators Beidler, C. D.; Kolesnichenko, Ya. I.; Marchenko, V. S. Physics of Plasmas, Vol. 8, Issue 6 https://doi.org/10.1063/1.1365958	journal	June 2001
Low-Frequency Limit of Interchange Instability Rosenbluth, Marshall N. Physics of Fluids, Vol. 11, Issue 4 https://doi.org/10.1063/1.1692009	journal	January 1968
Omnigenity as generalized quasisymmetry Landreman, Matt; Catto, Peter J. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.3693187	journal	May 2012
Collisionless microinstabilities in stellarators. I. Analytical theory of trapped-particle modes Helander, P.; Proll, J. H. E.; Plunk, G. G. Physics of Plasmas, Vol. 20, Issue 12 https://doi.org/10.1063/1.4846818	journal	December 2013
J* optimization of small aspect ratio stellarator/tokamak hybrid devices Spong, D. A.; Hirshman, S. P.; Whitson, J. C. Physics of Plasmas, Vol. 5, Issue 5 https://doi.org/10.1063/1.872844	journal	May 1998
Evaluation of 1/ν neoclassical transport in stellarators Nemov, V. V.; Kasilov, S. V.; Kernbichler, W. Physics of Plasmas, Vol. 6, Issue 12 https://doi.org/10.1063/1.873749	journal	December 1999
The Helias reactor HSR4/18 Beidler, C. D.; Harmeyer, E.; Herrnegger, F. Nuclear Fusion, Vol. 41, Issue 12 https://doi.org/10.1088/0029-5515/41/12/303	journal	December 2001
Recent advances in the LHD experiment Motojima, O.; Ohyabu, N.; Komori, A. Nuclear Fusion, Vol. 43, Issue 12 https://doi.org/10.1088/0029-5515/43/12/013	journal	December 2003
Characterization of energy confinement in net-current free plasmas using the extended International Stellarator Database Yamada, H.; Harris, J. H.; Dinklage, A. Nuclear Fusion, Vol. 45, Issue 12 https://doi.org/10.1088/0029-5515/45/12/024	journal	November 2005
Benchmarking of the mono-energetic transport coefficients—results from the International Collaboration on Neoclassical Transport in Stellarators (ICNTS) Beidler, C. D.; Allmaier, K.; Isaev, M. Yu. Nuclear Fusion, Vol. 51, Issue 7 https://doi.org/10.1088/0029-5515/51/7/076001	journal	June 2011
Physics analyses on the core plasma properties in the helical fusion DEMO reactor FFHR-d1 Miyazawa, J.; Suzuki, Y.; Satake, S. Nuclear Fusion, Vol. 54, Issue 4 https://doi.org/10.1088/0029-5515/54/4/043010	journal	March 2014
Less constrained omnigeneous stellarators Parra, Felix I.; Calvo, Iván; Helander, Per Nuclear Fusion, Vol. 55, Issue 3 https://doi.org/10.1088/0029-5515/55/3/033005	journal	February 2015
Flow damping in stellarators close to quasisymmetry Calvo, Iván; Parra, Felix I.; Velasco, José Luis Plasma Physics and Controlled Fusion, Vol. 57, Issue 1 https://doi.org/10.1088/0741-3335/57/1/014014	journal	November 2014
Direct Optimization of Fast-Ion Confinement in Stellarators Bindel, David; Landreman, Matt; Padidar, Misha Plasma Physics and Controlled Fusion, Vol. 65, Issue 6 https://doi.org/10.1088/1361-6587/acd141	journal	May 2023
The magnetic gradient scale length explains why certain plasmas require close external magnetic coils Kappel, John; Landreman, Matt; Malhotra, Dhairya Plasma Physics and Controlled Fusion, Vol. 66, Issue 2 https://doi.org/10.1088/1361-6587/ad1a3e	journal	January 2024
New method to design stellarator coils without the winding surface Zhu, Caoxiang; Hudson, Stuart R.; Song, Yuntao Nuclear Fusion, Vol. 58, Issue 1 https://doi.org/10.1088/1741-4326/aa8e0a	journal	November 2017
Properties of a new quasi-axisymmetric configuration Henneberg, S. A.; Drevlak, M.; Nührenberg, C. Nuclear Fusion, Vol. 59, Issue 2 https://doi.org/10.1088/1741-4326/aaf604	journal	January 2019
High-performance plasmas after pellet injections in Wendelstein 7-X Bozhenkov, S. A.; Kazakov, Y.; Ford, O. P. Nuclear Fusion, Vol. 60, Issue 6 https://doi.org/10.1088/1741-4326/ab7867	journal	May 2020
Turbulent transport of impurities in 3D devices García-Regaña, J. M.; Barnes, M.; Calvo, I. Nuclear Fusion, Vol. 61, Issue 11 https://doi.org/10.1088/1741-4326/ac1d84	journal	September 2021
Fast simulations for large aspect ratio stellarators with the neoclassical code KNOSOS Velasco, J. L.; Calvo, I.; Parra, F. I. Nuclear Fusion, Vol. 61, Issue 11 https://doi.org/10.1088/1741-4326/ac1dc7	journal	September 2021
Low-resistance joint development for segment-fabrication of high-temperature superconducting fusion magnets Ito, S.; Tamura, H.; Yanagi, N. Nuclear Fusion, Vol. 61, Issue 11 https://doi.org/10.1088/1741-4326/ac269e	journal	October 2021
A model for the fast evaluation of prompt losses of energetic ions in stellarators Velasco, J. L.; Calvo, I.; Mulas, S. Nuclear Fusion, Vol. 61, Issue 11 https://doi.org/10.1088/1741-4326/ac2994	journal	October 2021
A quasi-isodynamic configuration with good confinement of fast ions at low plasma β Sánchez, E.; Velasco, J. L.; Calvo, I. Nuclear Fusion, Vol. 63, Issue 6 https://doi.org/10.1088/1741-4326/accd82	journal	May 2023
Robust stellarator optimization via flat mirror magnetic fields Velasco, J. L.; Calvo, I.; Sánchez, E. Nuclear Fusion, Vol. 63, Issue 12 https://doi.org/10.1088/1741-4326/acfe8a	journal	October 2023
MONKES: a fast neoclassical code for the evaluation of monoenergetic transport coefficients in stellarator plasmas Escoto, F. J.; Velasco, J. L.; Calvo, I. Nuclear Fusion, Vol. 64, Issue 7 https://doi.org/10.1088/1741-4326/ad3fc9	journal	June 2024
Reduction of Turbulent Transport with Zonal Flows Enhanced in Helical Systems Watanabe, T. -H.; Sugama, H.; Ferrando-Margalet, S. Physical Review Letters, Vol. 100, Issue 19 https://doi.org/10.1103/PhysRevLett.100.195002	journal	May 2008
Magnetic Fields with Precise Quasisymmetry for Plasma Confinement Landreman, Matt; Paul, Elizabeth Physical Review Letters, Vol. 128, Issue 3 https://doi.org/10.1103/PhysRevLett.128.035001	journal	January 2022
Class of Model Stellarator Fields with Enhanced Confinement Mynick, H. E.; Chu, T. K.; Boozer, A. H. Physical Review Letters, Vol. 48, Issue 5 https://doi.org/10.1103/PhysRevLett.48.322	journal	February 1982
Helical Plasma Confinement Devices with Good Confinement Properties Cary, John R.; Shasharina, Svetlana G. Physical Review Letters, Vol. 78, Issue 4 https://doi.org/10.1103/PhysRevLett.78.674	journal	January 1997
Lessons Learned in Risk Management on NCSX Neilson, G. H.; Gruber, C. O.; Harris, J. H. IEEE Transactions on Plasma Science, Vol. 38, Issue 3 https://doi.org/10.1109/TPS.2009.2037889	journal	March 2010
Engineering Design of the Chinese First Quasi-Axisymmetric Stellarator (CFQS) Kinoshita, Shigeyoshi; Shimizu, Akihiro; Okamura, Shoichi Plasma and Fusion Research, Vol. 14, Issue 0 https://doi.org/10.1585/pfr.14.3405097	journal	January 2019

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