Results 1 to 10 of about 5,819 (232)
Confirmation of the topology of the Wendelstein 7-X magnetic field to better than 1:100,000 [PDF]
Nature Communications, 2016 Early stellarator designs suffered from high particle losses, an issue that can be addressed by optimization of the coils. Here the authors measure the magnetic field lines in the Wendelstein 7-X stellarator, confirming that the complicated design of the
T. Sunn Pedersen +9 more
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Critical gradient turbulence optimization toward a compact stellarator reactor concept
Physical Review Research, 2023 Integrating turbulence into stellarator optimization is achieved by targeting the onset for the ion-temperature-gradient mode, highlighting effects of field line curvature, parallel connection length, local magnetic shear, and flux surface expansion. The
G. T. Roberg-Clark +5 more
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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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Kinetic simulations of scrape-off layer physics in the DIII-D tokamak
Nuclear Materials and Energy, 2017 Simulations using the fully kinetic code XGCa were undertaken to explore the impact of kinetic effects on scrape-off layer (SOL) physics in DIII-D H-mode plasmas.
R.M. Churchill +7 more
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Nuclear Fusion, 2023 The computational cost of constructing 3D magnetohydrodynamic (MHD) equilibria is one of the limiting factors in stellarator research and design. Although data-driven approaches have been proposed to provide fast 3D MHD equilibria, the accuracy with ...
Andrea Merlo +5 more
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Coarse-grained gyrokinetics for the critical ion temperature gradient in stellarators
Physical Review Research, 2022 We present a modified gyrokinetic theory to predict the critical gradient that determines the linear onset of the ion temperature gradient (ITG) mode in stellarator plasmas.
G. T. Roberg-Clark +2 more
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Stellar ages from stellar rotation [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractOur ability to determine stellar ages from measurements of stellar rotation, hinges on how well we can measure the dependence of rotation on age for stars of different masses. Rotation periods for stars in open clusters are essential to determine the relations between stellar age, rotation, and mass.
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Stellar Motions and Stellar Dynamics [PDF]
Transactions of the International Astronomical Union, 1962 The texts of the twelve prepared contributions, often in abbreviated form, are given first; they are followed by a summary of the discussion on all the contributions considered together.
A. Blaauw +8 more
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Nuclear Materials and Energy, 2019 In ASDEX Upgrade with full-tungsten wall, boronization is an important tool to control tungsten sources and allow reliable operation at low collisionality. The duration of the beneficial effects is limited by the erosion of the boron layer, in particular
A. Bortolon +12 more
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Stellar Structure and the Origin of Stellar Energy* [PDF]
Nature, 1930 THE generally accepted theory of the internal conditions in stars, due to Sir A. S. Eddington, depends largely on a special solution of the fundamental equations, and according to this a definite calculable luminosity is associated with a given mass. If this were the only solution of the equations it would conflict, as I have repeatedly shown in recent
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