Zobrazeno 1 - 10 of 69 pro vyhledávání: '"R., Varennes"'
1
Akademický článek
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3
Impact of magnetic ripple on neoclassical equilibrium in gyrokinetic simulations
Autor: R Varennes, X Garbet, L Vermare, Y Sarazin, G Dif-Pradalier, V Grandgirard, P Ghendrih, P Donnel, M Peret, K Obrejan, E Bourne
The effect of magnetic field ripple on tokamak plasma without turbulence is studied numerically and augmented with a reduced analytical model that includes neoclassical processes in the presence of non-axisymmetric perturbation and stochastic transpo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56ab22735d982c96e8f25d788a8a518f
https://hal.science/hal-03631218
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4
Formation of the radial electric field profile in the WEST tokamak
Autor: L. Vermare, P. Hennequin, C. Honoré, M. Peret, G. Dif-Pradalier, X. Garbet, J. Gunn, C. Bourdelle, F. Clairet, J. Morales, R. Dumont, M. Goniche, P. Maget, R. Varennes, the WEST Team
Publikováno v: Nuclear Fusion
Nuclear Fusion, 2022, 62 (2), pp.026002. ⟨10.1088/1741-4326/ac3c85⟩
Sheared flows are known to reduce turbulent transport by decreasing the correlation length and/or intensity of turbulent structures. The transport barrier that takes place at the edge during improved regimes such as H mode, corresponds to the establi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97bedec4f9687dba723cd9adbf09179a
https://hal.science/hal-03441556
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5
Wave trapping and E × B staircases
Autor: Philippe Ghendrih, Yanick Sarazin, G. Dif-Pradalier, C. Gillot, Laure Vermare, Xavier Garbet, V. Grandgirard, R Varennes, O Panico
Publikováno v: Physics of Plasmas
Physics of Plasmas, 2021, ⟨10.1063/5.0042930⟩
Physics of Plasmas, American Institute of Physics, 2021, ⟨10.1063/5.0042930⟩
International audience; A model of E×B staircases is proposed, based on a wave kinetic equation coupled to a poloidal momentum equation. A staircase pattern is idealised as a periodic radial structure of zonal shear layers that bound regions of prop
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdfa24062b54f6b7c4a74c62f74d5e67
https://hal.science/hal-03097595
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6
Investigation of tokamak turbulent avalanches using wave-kinetic formulation in toroidal geometry
Autor: David Zarzoso, Yanick Sarazin, R Varennes, Guilhem Dif-Pradalier, C. Gillot, Xavier Garbet, Olivier Panico
Publikováno v: Journal of Plasma Physics
Journal of Plasma Physics, 2021
The interplay between toroidal drift-wave turbulence and tokamak profiles is investigated using a wave-kinetic description. The coupled system is used to investigate the interplay between marginally stable toroidal drift-wave turbulence and geodesic
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68f2709196d4e5c82ef26f98eafdc140
https://doi.org/10.1017/s0022377821000350
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7
Zonal instability and wave trapping
Autor: David Zarzoso, O Panico, G. Dif-Pradalier, Yanick Sarazin, C. Gillot, Xavier Garbet, E Bourne, V. Grandgirard, Laure Vermare, Philippe Ghendrih, R Varennes
Publikováno v: Journal of Physics: Conference Series
Journal of Physics: Conference Series, 2021
HAL
Journal of Physics: Conference Series, IOP Publishing, 2021
This paper presents a model for zonal flow generation based on a wave kinetic equation coupled to a poloidal momentum equation in a regime where wave trapping matters. Several models of the wave collision operator have been tested: Krook, diffusion a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92bde0b66b6396201d594e11a8893c34
https://hal.science/hal-03081047
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8
Akademický článek
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9
Impact of scaling laws on tokamak reactor dimensioning
Autor: Ph. Ghendrih, R. Guirlet, K. Gaudimont, Julien Hillairet, B. Pégourié, R Varennes, Yanick Sarazin, Alexandre Torre, Xavier Garbet, J. L. Duchateau
Publikováno v: Nuclear Fusion
Nuclear Fusion, 2019, 60, pp.016010. ⟨10.1088/1741-4326/ab48a5⟩
International audience; A simple and comprehensive method is derived and used to quantify the impact of scaling laws on tokamak reactor dimensioning. Assuming prescribed geometrical coefficients, we find the ensemble of possible triplets $R$, $B$ and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3deeb454a9aa0576e306e5b91dad480c
https://cea.hal.science/cea-02378299/document
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10
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