Zobrazeno 1 - 10
of 1 128
pro vyhledávání: '"Gyrokinetics"'
Publikováno v:
Nuclear Fusion, Vol 65, Iss 1, p 016002 (2024)
Burning plasma performance, transport, and the effect of hydrogen isotope (H, D, D-T fuel mix) on confinement has been predicted for ITER baseline scenario (IBS) conditions using nonlinear gyrokinetic profile predictions. Accelerated by surrogate mod
Externí odkaz:
https://doaj.org/article/a7f527adb3404bd798b2868a6ca70832
Autor:
A. Mariani, A. Balestri, P. Mantica, G. Merlo, R. Ambrosino, L. Balbinot, D. Brioschi, I. Casiraghi, A. Castaldo, L. Frassinetti, V. Fusco, P. Innocente, O. Sauter, G. Vlad
Publikováno v:
Nuclear Fusion, Vol 64, Iss 4, p 046018 (2024)
Plasmas with negative triangularity (NT) shape have been recently shown to be able to achieve H-mode levels of confinement in L-mode, avoiding detrimental edge localised modes. Therefore, this plasma geometry is now studied as a possible viable optio
Externí odkaz:
https://doaj.org/article/67974a29168b48ff86edf34ce44e080d
Publikováno v:
Nuclear Fusion, Vol 64, Iss 11, p 112007 (2024)
Turbulent transport in magnetically confined fusion plasma has conventionally been analyzed at the ion gyroradius scale based on the microturbulence theory. However, ion-scale turbulence analysis sometimes fails to predict the turbulent transport flu
Externí odkaz:
https://doaj.org/article/0c8bd4391ec34eb38069e2027079a549
Autor:
Yann Munschy, Emily Bourne, Guilhem Dif-Pradalier, Peter Donnel, Philippe Ghendrih, Virginie Grandgirard, Yanick Sarazin
Publikováno v:
Nuclear Fusion, Vol 64, Iss 5, p 056027 (2024)
The interaction between a plasma and a solid surface is studied in a (1D-1V) kinetic approach using immersed boundary conditions and penalization to model the wall. Two solutions for the penalized wall region are investigated that either allow curren
Externí odkaz:
https://doaj.org/article/5ff79a940e6e4dc886c1bf2f25e44524
Autor:
D.R. Hatch, M.T. Kotschenreuther, P.-Y. Li, B. Chapman-Oplopoiou, J. Parisi, S.M. Mahajan, R. Groebner
Publikováno v:
Nuclear Fusion, Vol 64, Iss 6, p 066007 (2024)
This paper reports on the refinement (building on (Hatch D.R. et al 2022 Phys. Plasmas 29 062501)) and application of simple formulas for electron heat transport from electron temperature gradient (ETG) driven turbulence in the pedestal. The formulas
Externí odkaz:
https://doaj.org/article/202680f3ce5746d19a78df13509244cc
Autor:
J.F. Parisi, W. Guttenfelder, A.O. Nelson, R. Gaur, A. Kleiner, M. Lampert, G. Avdeeva, J.W. Berkery, C. Clauser, M. Curie, A. Diallo, W. Dorland, S.M. Kaye, J. McClenaghan, F.I. Parra
Publikováno v:
Nuclear Fusion, Vol 64, Iss 5, p 054002 (2024)
A theoretical model is presented that for the first time matches experimental measurements of the pedestal width-height Diallo scaling in the low-aspect-ratio high- β tokamak NSTX. Combining linear gyrokinetics with self-consistent pedestal equilibr
Externí odkaz:
https://doaj.org/article/59abbc4427d147d292a3cbb4a424b6eb
Autor:
Young-Hoon Lee, Jungpyo Lee
Publikováno v:
Nuclear Fusion, Vol 64, Iss 6, p 066021 (2024)
The effects of poloidally inhomogeneous heat sources are investigated through a gyrokinetic formula in collisionless toroidal plasmas. A gyrokinetic dispersion relation is newly derived under the assumption that equilibrium parallel heat flows are ge
Externí odkaz:
https://doaj.org/article/f3c2a16a3a914d8796bc662c72cc86f2
Impact of supra-thermal particles on plasma performance at ASDEX Upgrade with GENE-Tango simulations
Autor:
A. Di Siena, R. Bilato, A. Bañón Navarro, M. Bergmann, L. Leppin, T. Görler, E. Poli, M. Weiland, G. Tardini, F. Jenko, the ASDEX Upgrade Team, the EUROfusion MST1 Team
Publikováno v:
Nuclear Fusion, Vol 64, Iss 6, p 066020 (2024)
This paper presents global gyrokinetic simulations on the transport time scale of an ASDEX Upgrade H-mode discharge showing a pronounced peaking of the on-axis ion temperature profiles. Leveraging the newly developed GENE-Tango tool, which combines t
Externí odkaz:
https://doaj.org/article/715918a7722d43f9a7656e1c2a312b37
Autor:
P. Rodriguez-Fernandez, N.T. Howard, A. Saltzman, S. Kantamneni, J. Candy, C. Holland, M. Balandat, S. Ament, A.E. White
Publikováno v:
Nuclear Fusion, Vol 64, Iss 7, p 076034 (2024)
This work presents the PORTALS framework (Rodriguez-Fernandez et al 2022 Nucl. Fusion 62 076036), which leverages surrogate modeling and optimization techniques to enable the prediction of core plasma profiles and performance with nonlinear gyrokinet
Externí odkaz:
https://doaj.org/article/dedf884de72443728b989638f31fe0ec
Publikováno v:
Nuclear Fusion, Vol 64, Iss 7, p 076033 (2024)
A fundamental dynamical constraint—that fluctuation induced charge-weighted particle flux must vanish- can prevent instabilities from accessing the free energy in the strong gradients characteristic of Transport Barriers (TBs). Density gradients, w
Externí odkaz:
https://doaj.org/article/dd057c83fa28412bb14c21505ab87ed2