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pro vyhledávání: '"Giacomin M"'
Electromagnetic microtearing modes (MTMs) have been observed in many different spherical tokamak regimes. Understanding how these and other electromagnetic modes nonlinearly saturate is likely critical in understanding the confinement of a high $\bet
Externí odkaz:
http://arxiv.org/abs/2409.08216
Starting from the assumption that saturation of plasma turbulence driven by temperature-gradient instabilities in fusion plasmas is achieved by a local energy cascade between a long-wavelength outer scale, where energy is injected into the fluctuatio
Externí odkaz:
http://arxiv.org/abs/2405.00854
Autor:
Giacomin, M., Dickinson, D., Dorland, W., Mandell, N. R., Bokshi, A., Casson, F. J., Dudding, H. G., Kennedy, D., Patel, B. S., Roach, C. M.
A quasi-linear reduced transport model is developed from a database of high-$\beta$ electromagnetic nonlinear gyrokinetic simulations performed with Spherical Tokamak for Energy Production (STEP) relevant parameters. The quasi-linear model is fully e
Externí odkaz:
http://arxiv.org/abs/2404.17453
Autor:
Kennedy, D., Roach, C. M., Giacomin, M., Ivanov, P., Adkins, T., Sheffield, F., örler, T. G, Bokshi, A., Dickinson, D., Dudding, H. G., Patel, B. S.
[ABRIDGED] This paper discusses the importance of parallel perturbations of the magnetic-field in gyrokinetic simulations of electromagnetic instabilities and turbulence at mid-radius in the burning plasma phase of the conceptual high-$\beta$, reacto
Externí odkaz:
http://arxiv.org/abs/2402.10583
Publikováno v:
Plasma Phys. Control. Fusion 65 095019 (2023)
First nonlinear gyrokinetic simulations of microtearing modes in the core of a MAST case are performed on two surfaces of the high-collisionality discharge used in Valovi\v{c} et al. Nucl. Fusion 51.7 (2011) to obtain the favorable energy confinement
Externí odkaz:
http://arxiv.org/abs/2303.02379
Autor:
Giacomin, M., Ricci, P.
Publikováno v:
Physics of Plasmas 29, 062303 (2022)
Two-fluid, three-dimensional, flux-driven, global, electromagnetic turbulence simulations carried out by using the GBS code are used to identify the main parameters controlling turbulent transport in the tokamak boundary and to delineate an electroma
Externí odkaz:
http://arxiv.org/abs/2205.04409
Publikováno v:
Phys. Rev. Lett. 128 (2022), 185003
A first-principles scaling law, based on turbulent transport considerations, and a multi-machine database of density limit discharges from the ASDEX Upgrade, JET and TCV tokamaks, show that the increase of the boundary turbulent transport with the pl
Externí odkaz:
http://arxiv.org/abs/2204.02911
Results of a three-dimensional, flux-driven, electrostatic, global, two-fluid turbulence simulation for a 5-field period stellarator with an island divertor are presented. The numerical simulation is carried out with the GBS code, recently extended t
Externí odkaz:
http://arxiv.org/abs/2201.10871
Autor:
Giacomin, M., Ricci, P., Coroado, A., Fourestey, G., Galassi, D., Lanti, E., Mancini, D., Richart, N., Stenger, L. N., Varini, N.
Publikováno v:
J. Comput. Phys. 463 (2022) 111294
A new version of GBS (Ricci et al. Plasma Phys. Control. Fusion 54, 124047, 2012; Halpern et al. J. Comput. Phys. 315, 388-408, 2016; Paruta et al. Phys. Plasmas 25, 112301, 2018) is described. GBS is a three-dimensional, flux-driven, global, two-flu
Externí odkaz:
http://arxiv.org/abs/2112.03573
Autor:
Oliveira, D. S., Body, T., Galassi, D., Theiler, C., Laribi, E., Tamain, P., Stegmeir, A., Giacomin, M., Zholobenko, W., Ricci, P., Bufferand, H., Boedo, J. A., Ciraolo, G., Colandrea, C., Coster, D., de Oliveira, H., Fourestey, G., Gorno, S., Imbeaux, F., Jenko, F., Naulin, V., Offeddu, N., Reimerdes, H., Serre, E., Tsui, C. K., Varini, N., Vianello, N., Wiesenberger, M., Wüthrich, C., Team, the TCV
Self-consistent full-size turbulent-transport simulations of the divertor and SOL of existing tokamaks have recently become feasible. This enables the direct comparison of turbulence simulations against experimental measurements. In this work, we per
Externí odkaz:
http://arxiv.org/abs/2109.01618