Results 1 to 10 of about 2,547,829 (287)

Demonstration of reduced neoclassical energy transport in Wendelstein 7-X. [PDF]

Nature, 2021
Research on magnetic confinement of high-temperature plasmas has the ultimate goal of harnessing nuclear fusion for the production of electricity. Although the tokamak1 is the leading toroidal magnetic-confinement concept, it is not without shortcomings ...
Beidler CD, Smith HM, Alonso A, Andreeva T, Baldzuhn J, Beurskens MNA, Borchardt M, Bozhenkov SA, Brunner KJ, Damm H, Drevlak M, Ford OP, Fuchert G, Geiger J, Helander P, Hergenhahn U, Hirsch M, Höfel U, Kazakov YO, Kleiber R, Krychowiak M, Kwak S, Langenberg A, Laqua HP, Neuner U, Pablant NA, Pasch E, Pavone A, Pedersen TS, Rahbarnia K, Schilling J, Scott ER, Stange T, Svensson J, Thomsen H, Turkin Y, Warmer F, Wolf RC, Zhang D, W7-X Team.   +39 more
europepmc   +4 more sources

MONKES: a fast neoclassical code for the evaluation of monoenergetic transport coefficients in stellarator plasmas [PDF]

Nuclear Fusion, 2023
MONKES is a new neoclassical code for the evaluation of monoenergetic transport coefficients in stellarators. By means of a convergence study and benchmarks with other codes, it is shown that MONKES is accurate and efficient.
F.J. Escoto, J.L. Velasco, I. Calvo, M. Landreman, F.I. Parra   +4 more
doaj   +2 more sources

Energy transport analysis of NSTX plasmas with the TGLF turbulent and NEO neoclassical transport models

Nuclear Fusion, 2023
This work presents a study of plasma transport at low aspect ratio on the National Spherical Torus Experiment tokamak, where the turbulent and neoclassical energy fluxes calculated by the quasilinear Trapped Gyro Landau Fluid (TGLF) model and the multi ...
G. Avdeeva, K.E. Thome, S.P. Smith, D.J. Battaglia, C.F. Clauser, W. Guttenfelder, S.M. Kaye, J. McClenaghan, O. Meneghini, T. Odstrcil, G. Staebler   +10 more
doaj   +2 more sources

Reduction of neoclassical bulk-ion transport to avoid helium-ash retention in stellarator reactors

Nuclear Fusion
The reduction of neoclassical energy transport in stellarators has traditionally focussed on optimizing magnetic fields for small values of ‘effective helical ripple’ — $\epsilon_\mathrm{eff}$ , the geometric factor associated with electron $1/\nu ...
C.D. Beidler, M. Drevlak, J. Geiger, P. Helander, H.M. Smith, Y. Turkin   +5 more
doaj   +2 more sources

Self-consistent, global, neoclassical radial-electric-field calculations of electron-ion-root transitions in the W7-X stellarator

Nuclear Fusion
The radial electric field in the Wendelstein 7-X stellarator is computed by means of self-consistent, global, neoclassical simulations using the gyrokinetic particle-in-cell code EUTERPE.
M.D. Kuczyński, R. Kleiber, H.M. Smith, C.D. Beidler, M. Borchardt, J. Geiger, P. Helander   +6 more
doaj   +2 more sources

Neoclassical transport in strong gradient regions of large aspect ratio tokamaks [PDF]

Journal of Plasma Physics, 2023
We present a new neoclassical transport model for large aspect ratio tokamaks where the gradient scale lengths are of the size of the ion poloidal gyroradius.
Silvia Trinczek, F. Parra, P. Catto, I. Calvo, M. Landreman   +4 more
semanticscholar   +1 more source

Experimental confirmation of efficient island divertor operation and successful neoclassical transport optimization in Wendelstein 7-X [PDF]

Nuclear Fusion, 2021
We present recent highlights from the most recent operation phases of Wendelstein 7-X, the most advanced stellarator in the world. Stable detachment with good particle exhaust, low impurity content, and energy confinement times exceeding 100 ms, have ...
T. Sunn Pedersen, E. Sánchez
semanticscholar   +1 more source

Neoclassical transport of impurities in tokamaks with non-axisymmetric perturbations

Physics of Plasmas, 2023
The effect of resonant magnetic perturbations (RMPs) on neoclassical transport of impurities is calculated in DIII-D and NSTX. The neoclassical fluxes are evaluated using the NEO code with nonlinear one-fluid nonaxisymmetric equilibrium calculated using ...
P. Sinha, N. Ferraro, E. Belli
semanticscholar   +1 more source

Enhancement of neoclassical impurity density up/down asymmetry and Pfirsch–Schlüter transport due to the plasma elongation in the tokamak plasmas

Nuclear Fusion, 2023
The standard neoclassical theory of the impurity transport in tokamak plasma is improved by including the plasma elongation effect. The neoclassical up/down asymmetry of the impurity density is largely enhanced by the plasma elongation and is under ...
Chengkang Pan
doaj   +1 more source

Neoclassical transport due to resonant magnetic perturbations in DIII-D

Nuclear Fusion, 2022
The role of neoclassical physics in the particle and energy transport during the application of resonant magnetic perturbations (RMPs) to suppress the edge localised modes in a tokamak is analysed.
P. Sinha, N. Ferraro, E. Belli
semanticscholar   +1 more source