Results 1 to 10 of about 249 (184)

A promising approach to steady-state fusion: High-temperature superconducting strong-field stellarator with precise omnigenity [PDF]

The Innovation
The stellarator has inherent advantages over the tokamak in achieving steady-state operation, especially due to its absence of disruptions and lack of need for current drive and the associated recirculating power.
Guosheng Xu, Zhiyuan Lu, Dehong Chen, Baonian Wan   +3 more
doaj   +2 more sources

First-principles based plasma profile predictions for optimized stellarators

Nuclear Fusion, 2023
In the present Letter, first-of-its-kind computer simulations predicting plasma profiles for modern optimized stellarators—while self-consistently retaining neoclassical transport, turbulent transport with 3D effects, and external physical sources—are ...
A. Bañón Navarro, A. Di Siena, J.L. Velasco, F. Wilms, G. Merlo, T. Windisch, L.L. LoDestro, J.B. Parker, F. Jenko   +8 more
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Greedy permanent magnet optimization

Nuclear Fusion, 2023
A number of scientific fields rely on placing permanent magnets in order to produce a desired magnetic field. We have shown in recent work that the placement process can be formulated as sparse regression.
Alan A. Kaptanoglu, Rory Conlin, Matt Landreman   +2 more
doaj   +1 more source

A novel scheme for error field correction in permanent magnet stellarators

Nuclear Fusion, 2023
Stellarators offer a promising path towards fusion reactors, but their design and construction are complicated by stringent tolerance requirements on highly complex 3D coils. A potential way to simplify the engineering requirements for stellarators is to
A. Rutkowski, K. Hammond, C. Zhu, D. Gates, A. Chambliss   +4 more
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Nonlinear growth of zonal flows by secondary instability in general magnetic geometry

New Journal of Physics, 2017
We present a theory of the nonlinear growth of zonal flows in magnetized plasma turbulence, by the mechanism of secondary instability. The theory is derived for general magnetic geometry, and is thus applicable to both tokamaks and stellarators.
G G Plunk, A Bañón Navarro
doaj   +1 more source

A comparison of the influence of plasmoid-drift mechanisms on plasma fuelling by cryogenic pellets in ITER and Wendelstein 7-X

Nuclear Fusion, 2023
Pellet injection is the most promising technique to achieve efficient plasma core fuelling, key for attaining stationary scenarios in large magnetic confinement fusion devices.
N. Panadero, F. Koechl, A.R. Polevoi, J. Baldzuhn, C.D. Beidler, P.T. Lang, A. Loarte, A. Matsuyama, K.J. McCarthy, B. Pégourié, Y. Turkin   +10 more
doaj   +1 more source

Long plasma duration operation analyses with an international multi-machine (tokamaks and stellarators) database

Nuclear Fusion, 2023
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, H.-S. Bosch, T. Morisaki, M. Barbarino, A. Bock, E. Belonohy, S. Brezinsek, J. Bucalossi, S. Coda, R. Daniel, A. Ekedahl, K. Hanada, C. Holcomb, J. Huang, S. Ide, M. Jakubowski, B. V. Kuteev, E. Lerche, T. Luce, P. Maget, Y. Song, J. Stober, D. VAN Houtte, Y. Xi, L. Xue, S. Yoon, B. Zhang, JET contributors   +27 more
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Prevention of core particle depletion in stellarators by turbulence

Physical Review Research, 2023
In reactor-relevant plasmas, neoclassical transport drives an outward particle flux in the core of large stellarators and predicts strongly hollow density profiles. However, this theoretical prediction is contradicted by experiments.
H. Thienpondt, J. M. García-Regaña, I. Calvo, J. A. Alonso, J. L. Velasco, A. González-Jerez, M. Barnes, K. Brunner, O. Ford, G. Fuchert, J. Knauer, E. Pasch, L. Vanó   +12 more
doaj   +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

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