Results 61 to 70 of about 922 (184)

Isotope impact on Alfvén eigenmodes and fast ion transport in DIII-D

Nuclear Fusion
Measurements of beam driven Alfvén Eigenmode (AE) activity in matched deuterium (D) and hydrogen (H) DIII-D plasmas show a dramatic difference in unstable mode activity and fast ion transport for a given injected beam power.
M.A. Van Zeeland, E. Bass, X.D. Du, W.W. Heidbrink, C. Chrystal, C. Crocker, G. DeGrandchamp, S. Haskey, D. Liu, J. Gonzalez-Martin, K.E. Thome, G. Yu, Y. Zhu   +12 more
doaj   +1 more source

Wave–particle interactions in tokamaks

Nuclear Fusion
Transport consequences of the wave–particle interactions in the quasilinear plateau (QP) regime are presented. Eulerian approach is adopted to solve the drift kinetic equation that includes the physics of the nonlinear trapping (NT) and QP regimes.
K.C. Shaing, M. Garcia-Munoz, E. Viezzer, R.W. Harvey   +3 more
doaj   +1 more source

A Review of Fusion and Tokamak Research Towards Steady-State Operation: A JAEA Contribution

Energies, 2010
Providing a historical overview of 50 years of fusion research, a review of the fundamentals and concepts of fusion and research efforts towards the implementation of a steady state tokamak reactor is presented.
Mitsuru Kikuchi
doaj   +1 more source

SPECTROSCOPIC DIAGNOSTICS OF TOKAMAKS

Le Journal de Physique Colloques, 1988
AbstractImpurities being an important concern in tokamaks, spectroscopy plays a key role in their understanding. Techniques for the evaluation of concentrations, power losses and transport properties are surveyed, and a few developments are outlined.
openaire   +1 more source

Investigating long-duration plasma operation with the international multi-machine CICLOP database

Nuclear Fusion
Combined high-fusion performance and long-pulse operation is one of the key integration challenges for fusion energy development in magnetic devices. Addressing these challenges requires an integrated vision of physics and engineering aspects with the ...
X. Litaudon, E. Lerche, O. Grulke, C.T. Holcomb, J. Huang, M. Jakubowski, H.S. Kim, P. Manas, T. Morisaki, F. Turco, M. Barbarino, E. Belonohy, A. Bock, S. Brezinsek, J. Bucalossi, S. Coda, L.F. Delgado-Aparicio, P. De Vries, A. Ekedahl, L. Frassinetti, A. Garofalo, C. Giroud, X. Gong, K. Hanada, S. Ide, B.V. Kuteev, P. Maget, J. Stober, D. Van Houtte, the IEA-IAEA Coordination on International Challenges on Long duration OPeration (CICLOP) group   +29 more
doaj   +1 more source

Model-predictive kinetic control with data-driven models on EAST

Nuclear Fusion
In this work, model-predictive control (MPC) was combined for the first time with singular perturbation theory, and an original plasma kinetic control method based on extremely simple data-driven models and a two-time-scale MPC algorithm has been ...
D. Moreau, S. Wang, J.P. Qian, Q. Yuan, Y. Huang, Y. Li, S. Ding, H. Du, X. Gong, M. Li, H. Liu, Z. Luo, L. Zeng, E. Olofsson, B. Sammuli, J.F. Artaud, A. Ekedahl, E. Witrant   +17 more
doaj   +1 more source

Observation of stationary filaments with resonant magnetic perturbations in NSTX

Nuclear Fusion
The application of resonant magnetic perturbations (RMPs) induces striated heat fluxes on the divertor plate in tokamaks. These striated heat fluxes were previously considered strike point splitting by the intersection between the divertor and predicted ...
K.F. Gan, E.D. Fredrickson, J.W. Berkery, S. Munaretto, A. Kleiner, M. Lampert, J.-K. Park, R. Maingi, A.G. McLean, T.K. Gray, B.D. Wirth   +10 more
doaj   +1 more source

Exploring the physics of a high-performance H-mode scenario with small ELMs at low collisionality in JET with Be/W wall

Nuclear Fusion
A new H-mode regime at low density and low edge safety factor ( q _95 = 3.2, with $I_\mathrm{p}$ = 3 MA) that combines high energy confinement, stationary conditions for density and radiation and small Edge Localized Modes (ELMs) have been found in JET ...
E. de la Luna, J. Garcia, M. Sertoli, P. Lomas, S. Mazzi, Ž. Štancar, M. Dunne, N. Aiba, S. Silburn, M. Faitsch, G. Szepesi, F. Auriemma, I. Balboa, L. Frassinetti, L. Garzotti, S. Menmuir, D. Refy, F. Rimini, E.R. Solano, C. Sozzi, M. Vecsei, JET Contributors   +21 more
doaj   +1 more source

Steady-state burning plasma: a new stage in the development of magnetic confinement fusion energy. [PDF]

Natl Sci Rev, 2023
Wan B, Xu G.
europepmc   +1 more source

The formation of an radial edge electric field due to finite ion orbit width effects is the possible root cause of the H-mode edge

Nuclear Fusion
Full orbit-following simulations of thermal ions show that finite ion-orbit width effects create charge separation near the last closed flux surface (LCFS) which generates a localized radial electric field.
G.J. Kramer, A. Bortolon, A. Diallo, R. Maingi   +3 more
doaj   +1 more source