Results 1 to 10 of about 4,926 (209)
A promising approach to steady-state fusion: High-temperature superconducting strong-field stellarator with precise omnigenity. [PDF]
Innovation (Camb)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.
Xu G, Lu Z, Chen D, Wan B.
europepmc +2 more sources
Collisionless microinstabilities in stellarators. II. Numerical simulations [PDF]
Physics of Plasmas, 2013 Microinstabilities exhibit a rich variety of behavior in stellarators due to the many degrees of freedom in the magnetic geometry. It has recently been found that certain stellarators (quasi-isodynamic ones with maximum-$J$ geometry) are partly resilient
Per Helander
exaly +3 more sources
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.
Navarro, A. Bañón, Plunk, G. G.
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Collisionless microinstabilities in stellarators. I. Analytical theory of trapped-particle modes
Physics of Plasmas, 2013 This is the first of two papers about collisionless, electrostatic micro-instabilities in stellarators, with an emphasis on trapped-particle modes. It is found that, in so-called maximum-$J$ configurations, trapped-particle instabilities are absent in ...
Per Helander
exaly +3 more sources
Nature, 1931 Es wird der Meinungsaustausch zwischen Milne, Eddington und Jeans dargelegt, der am 9. Januar d. J. während der Sitzung der Royal Astronomical Society in London stattfand. Milne erklärte, daß der Hauptzweck seiner Theorie des Sterninnerns in der Befreiung der Eddingtonsehen Theorie von ad hoc-Hypothesen liege.
Russell, H. N., Atkinson, R. d'E.
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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 +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 +2 more
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Distinct turbulence saturation regimes in stellarators [PDF]
, 2017 In the complex 3D magnetic fields of stellarators, ion-temperature-gradient turbulence is shown to have two distinct saturation regimes, as revealed by petascale numerical simulations, and explained by a simple turbulence theory.
Helander, P. +2 more
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Properties of a new quasi-axisymmetric configuration [PDF]
, 2018 A novel, compact, quasi-axisymmetric configuration is presented which exhibits low fast-particle losses and is stable to ideal MHD instabilities. The design has fast-particle loss rates below 8\% for flux surfaces within the half-radius, and is shown to ...
Beidler, C. D. +6 more
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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 +4 more
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