Results 21 to 30 of about 18,475 (245)
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.
+9 more sources
The DESC stellarator code suite Part 3: Quasi-symmetry optimization [PDF]
Journal of Plasma Physics, 2022 The DESC stellarator optimization code takes advantage of advanced numerical methods to search the full parameter space much faster than conventional tools.
Daniel W. Dudt +3 more
semanticscholar +1 more source
A single-field-period quasi-isodynamic stellarator [PDF]
Journal of Plasma Physics, 2022 A single-field-period quasi-isodynamic stellarator configuration is presented. This configuration, which resembles a twisted strip, is obtained by the method of direct construction, that is, it is found via an expansion in the distance from the magnetic ...
R. Jorge +6 more
semanticscholar +1 more source
Direct construction of stellarator-symmetric quasi-isodynamic magnetic configurations [PDF]
Journal of Plasma Physics, 2022 We develop the formalism of the first-order near-axis expansion of the magnetohydrodynamic equilibrium equations described by Garren & Boozer (Phys. Fluids B, vol. 3, issue 10, 1991, pp. 2805–2821) and Plunk et al. (J. Plasma Phys., vol.
K. Camacho Mata, G. Plunk, R. Jorge
semanticscholar +1 more source
Reduction of electrostatic turbulence in a quasi-helically symmetric stellarator via critical gradient optimization [PDF]
Journal of Plasma Physics, 2022 We present a stellarator configuration optimized for a large threshold (‘critical gradient’) for the onset of the ion temperature gradient (ITG) driven mode, which achieves the largest critical gradient we have seen in any stellarator.
G. Roberg-Clark +2 more
semanticscholar +1 more source
GX: a GPU-native gyrokinetic turbulence code for tokamak and stellarator design [PDF]
Journal of Plasma Physics, 2022 GX is a code designed to solve the nonlinear gyrokinetic system for low-frequency turbulence in magnetized plasmas, particularly tokamaks and stellarators.
N. Mandell +6 more
semanticscholar +1 more source
Design and construction of the MUSE permanent magnet stellarator
Journal of Plasma Physics, 2023 This paper documents the design and construction of MUSE, the world's first permanent magnet (PM) stellarator and the first quasi-axisymmetric experiment. The purpose of MUSE is to develop and assess a new way of building optimised stellarators that uses
T. Qian +10 more
semanticscholar +1 more source
Design of an arrangement of cubic magnets for a quasi-axisymmetric stellarator experiment [PDF]
Nuclear Fusion, 2022 The usage of permanent magnets to shape the confining magnetic field of a stellarator has the potential to reduce or eliminate the need for non-planar coils.
K. Hammond +7 more
semanticscholar +1 more source
Contributions to Plasma Physics, Volume 63, Issue 5-6, June-July 2023., 2023 Abstract In three‐dimensional (3D) equilibrium, reconstruction defining parameters of an ideal magneto‐hydrodynamic equilibrium are inferred from a set of plasma diagnostic measurements. For the reconstructed parameters, various forms of uncertainty estimates exist within common 3D reconstruction frameworks.
Robert Köberl +5 more
wiley +1 more source
Beltrami fields and knotted vortex structures in incompressible fluid flows
Bulletin of the London Mathematical Society, Volume 55, Issue 3, Page 1059-1103, June 2023., 2023 Abstract This paper gives a survey on recent results about the existence of knotted vortex structures in incompressible fluids. This includes the proof of Lord Kelvin's conjecture on the existence of knotted vortex tubes in steady Euler flows and a new probabilistic approach to address Arnold's speculation that typical Beltrami fields should exhibit ...
Alberto Enciso, Daniel Peralta‐Salas
wiley +1 more source