Results 31 to 40 of about 4,926 (209)

Simulating Gyrokinetic Microinstabilities in Stellarator Geometry with GS2 [PDF]

, 2011
The nonlinear gyrokinetic code GS2 has been extended to treat non-axisymmetric stellarator geometry. Electromagnetic perturbations and multiple trapped particle regions are allowed.
Beidler C., D. R. Mikkelsen, E. A. Belli, Fu G., G. Rewoldt, G. W. Hammett, J. A. Baumgaertel, P. Xanthopoulos, Sapper J., W. Dorland, W. Guttenfelder, W. M. Tang   +11 more
core   +1 more source

Suppression of non-axisymmetric field-induced α-particle loss channels in a quasi-axisymmetric stellarator

AIP Advances, 2022
In future fusion reactors, the confinement of α-particles is a crucial issue. The perfect omnigenity may be difficult to achieve in the quasi-isodynamic and quasi-symmetric stellarators when a multi-objective optimization is considered.
Yichao Zhang, Haifeng Liu, Jie Huang, Yuhong Xu, Jian Zhang, Akihiro Shimizu, Shinsuke Satake, Mitsutaka Isobe, Xianqu Wang, Jun Cheng, Hai Liu, Xin Zhang, Changjian Tang   +12 more
doaj   +1 more source

The importance of the classical channel in the impurity transport of optimized stellarators [PDF]

, 2019
In toroidal magnetic confinement devices, such as tokamaks and stellarators, neoclassical transport is usually an order of magnitude larger than its classical counterpart.
Buller, S., Mollén, A., Newton, S. L., Pusztai, I., Smith, H. M.   +4 more
core   +2 more sources

Heat Load Mitigation Studies in the W7‐X Stellarator Experiment

Contributions to Plasma Physics, EarlyView.
ABSTRACT During the experiments at the stellarator Wendelstein 7‐X (W7‐X) with fully water‐cooled plasma‐facing components (PFC), including carbon‐fiber composite (CFC) divertor targets with a thermal load capability of 10 MW/m2, high performance was achieved.
Dirk Naujoks, Amit Kharwandikar, Jasper Dettmar, Michael Endler, Joris Fellinger, Yu Gao, Joachim Geiger, Marcin Jakubowski, Thomas Sieber, Sebastian Thiede, Christian Voß, W7‐X Team   +11 more
wiley   +1 more source

Coil optimization methods for a planar coil stellarator

Nuclear Fusion
The planar coil stellarator design is a novel approach to producing the confining magnetic field of a stellarator plasma. The work presented here details the optimization of the two types of planar coils that are used in the planar coil design: the ...
T.G. Kruger, M.F. Martin, D.A. Gates, the Thea Energy Team   +3 more
doaj   +1 more source

Magneto‐Thermal Assessment of Ferrofluid Flow in Corrugated Porous Domain With Rotating Cylinder for Nuclear Systems

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This research presents a novel approach by combining magnetohydrodynamic (MHD) flow with ohmic heating to investigate the conjugate mixed convective transport of ferrofluid in a discretely heated, smooth/wavy‐walled, square‐shaped porous compartment featuring a clockwise spinning cylindrical body positioned at various locations.
Nahid Hasan, Sumon Saha, Sreekala Cherkkarathandayan Karappan, Siam Abrar Saad, Hamza Faraji   +4 more
wiley   +1 more source

Oscillatory relaxation of zonal flows in a multi-species stellarator plasma

, 2018
The low frequency oscillatory relaxation of zonal potential perturbations is studied numerically in the TJ-II stellarator (where it was experimentally detected for the first time).
Alonso, A., Calvo, I., Kleiber, R., Medina, F., Monreal, P., Sánchez, E., team, the TJ-II, Velasco, J. L.   +7 more
core   +1 more source

Control of stochasticity in magnetic field lines [PDF]

, 2005
We present a method of control which is able to create barriers to magnetic field line diffusion by a small modification of the magnetic perturbation. This method of control is based on a localized control of chaos in Hamiltonian systems.
Chandre, Cristel, Ciraolo, Guido, Ghendrih, Philippe, Lima, Ricardo, Vittot, Michel   +4 more
core   +6 more sources

Geometry effects on zonal flow dynamics and turbulent transport in optimized stellarators

Nuclear Fusion
Global gyrokinetic simulations find a strong suppression of ion temperature gradient (ITG) turbulence by zonal flows in stellarators optimized for neoclassical transport.
Haotian Chen, Xishuo Wei, Hongxuan Zhu, Zhihong Lin   +3 more
doaj   +1 more source

A general comparison between tokamak and stellarator plasmas

Matter and Radiation at Extremes, 2016
This paper generally compares the essential features between tokamaks and stellarators, based on previous review work individually made by authors on several specific topics, such as theories, bulk plasma transport and edge divertor physics, along with ...
Yuhong Xu
doaj   +1 more source