Zobrazeno 1 - 10 of 55 pro vyhledávání: '"Holger Heumann"'
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Akademický článek
Finite element methods on composite meshes for tuning plasma equilibria in tokamaks
Autor: Holger Heumann, Francesca Rapetti, Xiao Song
Publikováno v: Journal of Mathematics in Industry, Vol 8, Iss 1, Pp 1-24 (2018)
Abstract The fundamental concept of magnetically confined nuclear fusion devices is the magnetohydrodynamic (MHD) equilibrium: the pressure gradient due to highly energetic charged particles is balanced by the Lorenz force due to strong magnetic fiel
Externí odkaz: https://doaj.org/article/769d06973a0e4bfc8a2867b11a0a41be
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2
Tokamak discharge simulation coupling freeboundary equilibrium and plasma model with application to JT-60SA
Autor: Jean-Francois Artaud, Gerardo Giruzzi, E. Joffrin, Hajime Urano, Valeria Ostuni, Holger Heumann
Publikováno v: Nuclear Fusion
Nuclear Fusion, IOP Publishing, 2021, 61, pp.026021. ⟨10.1088/1741-4326/abcdb7⟩
Nuclear Fusion, 2021, 61, pp.026021. ⟨10.1088/1741-4326/abcdb7⟩
In order to simulate a full tokamak discharge, a fast integrated tokamak modeling tool for scenario design, METIS, is coupled with a quasi-static free-boundary magnetic equilibrium code, FEEQS. The first code is able to compute at each time the plasm
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e05856f2508561f4c3f2cf97f0225c73
https://hal-cea.archives-ouvertes.fr/cea-03287071/document
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3
A Galerkin method for the weak formulation of current diffusion and force balance in tokamak plasmas
Autor: Holger Heumann
Publikováno v: Journal of Computational Physics. 442:110483
This paper presents a new numerical approach to the simulation of plasma equilibrium evolution in tokamaks. It is based on an unusual coupling formulation of current diffusion and axi-symmetric equilibrium equations that does not require the use of f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f1bf08bb858de5b41656cb49b06d9e79
https://doi.org/10.1016/j.jcp.2021.110483
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4
Automating the design of tokamak experiment scenarios
Autor: Jacques Blum, Xiao Song, Eric Nardon, Holger Heumann
Publikováno v: Journal of Computational Physics
Journal of Computational Physics, 2019, 394, pp.594-614. ⟨10.1016/j.jcp.2019.05.046⟩
Journal of Computational Physics, Elsevier, 2019, 394, pp.594-614. ⟨10.1016/j.jcp.2019.05.046⟩
International audience; The real-time control of plasma position, shape and current in a tokamak has to beensured by a number of electrical circuits consisting of voltage suppliers and axisymmetric coils.Finding good target voltages/currents for the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1b6543bb16ce51a67d6e5e74ac9a0c4
https://hal.science/hal-02418396/document
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5
Automatic identification of the plasma equilibrium operating space in tokamaks
Autor: Holger Heumann, Blaise Faugeras, Xiao Song, Eric Nardon
Publikováno v: Fusion Engineering and Design
Fusion Engineering and Design, Elsevier, 2019, 146, pp.1242-1245. ⟨10.1016/j.fusengdes.2019.02.050⟩
Fusion Engineering and Design, 2019, 146, pp.1242-1245. ⟨10.1016/j.fusengdes.2019.02.050⟩
International audience; In order to identify the plasma equilibrium operating space for future tokamaks, a new objective function is introduced in the inverse static free-boundary equilibrium code FEEQS.M. This function comprises terms which penalize
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9f746a543283d5e1c0ce5a88ebc7342
https://hal.archives-ouvertes.fr/hal-02395044
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6
The new magnetic diagnostics in the WEST tokamak
Autor: West Team, A Le-Luyer, P. Kumari, Eric Nardon, C. Brun, Blaise Faugeras, F. Saint-Laurent, S. Belsare, A. Berne, B. Santraine, P. Malard, M Moreau, Jean-Francois Artaud, B Cantone, R. Nouailletas, Holger Heumann, P. Moreau, P. Spuig, J. Morales
Publikováno v: Review of Scientific Instruments
Review of Scientific Instruments, 2018, 89 (10), ⟨10.1063/1.5036537⟩
Review of Scientific Instruments, American Institute of Physics, 2018, 89 (10), ⟨10.1063/1.5036537⟩
International audience; The WEST tokamak consists of a major upgrade of the superconducting medium size tokamak Tore Supra aiming at testing ITER divertor components. Such modification has required rebuilding a full set of magnetic diagnostics. The p
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97de7f4421f9aaac7c26c71e4b404f05
https://hal.science/hal-01936106
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8
A new high-order fluid solver for tokamak edge plasma transport simulations based on a magnetic-field independent discretization
Autor: Frédéric Schwander, Eric Serre, Thomas Camminady, Holger Heumann, Giorgio Giorgiani, Philippe Ghendrih, Hervé Guillard, Guido Ciraolo, Patrick Tamain, Hugo Bufferand, Boniface Nkonga
Publikováno v: Contributions to Plasma Physics
Contributions to Plasma Physics, 2018, pp.1-8. ⟨10.1002/ctpp.201700172⟩
Contributions to Plasma Physics, Wiley-VCH Verlag, 2018, pp.1-8. ⟨10.1002/ctpp.201700172⟩
International audience; Our global understanding of the power exhaust in tokamaks, and its implications for both steady-state and transient heat loads on divertor and limiter PFCs, is still poor. In transient situations in particular, such as during
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e38fef90acf61c462629abcfe5f375f0
https://hal.science/hal-01657680/document
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9
A High Order Method for the Approximation of Integrals Over Implicitly Defined Hypersurfaces
Autor: Kersten Schmidt, Lukas Drescher, Holger Heumann
Publikováno v: SIAM Journal on Numerical Analysis
SIAM Journal on Numerical Analysis, Society for Industrial and Applied Mathematics, 2017, 55 (6), pp.2592-2615. ⟨10.1137/16M1102227⟩
SIAM Journal on Numerical Analysis, 2017, 55 (6), pp.2592-2615. ⟨10.1137/16M1102227⟩
International audience; We introduce a novel method to compute approximations of integrals over implicitly defined hyper-surfaces. The new method is based on a weak formulation in L 2 (0, 1), that uses the coarea formula to circumvent an explicit int
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1777561202094a1c83c03385e86d84c7
https://hal.archives-ouvertes.fr/hal-01637946/document
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10
FEM-BEM coupling methods for Tokamak plasma axisymmetric free-boundary equilibrium computations in unbounded domains
Autor: Blaise Faugeras, Holger Heumann
Publikováno v: Journal of Computational Physics
Journal of Computational Physics, Elsevier, 2017, 343, pp.201-216. ⟨10.1016/j.jcp.2017.04.047⟩
Journal of Computational Physics, 2017, 343, pp.201-216. ⟨10.1016/j.jcp.2017.04.047⟩
International audience; Incorporating boundary conditions at infinity into simulations on bounded computational domains is a repeatedly occurring problem in scientific computing. The combination of finite element methods (FEM) and boundary element me
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a5ecf4d3fa23f06a19f32783c8a3165
https://hal.archives-ouvertes.fr/hal-01637945
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