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Symposium - International Astronomical Union, 1986 We have been monitoring the CaII H and K emission in late-type giant stars using the Mt Wilson 60-inch telescope. It is a continuation of work that Olin Wilson began almost 20 years ago. As a result not only have starspot cycles been detected (equivalent to the solar sunspot cycle), but rotation periods have now been measured.
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Contributions to Plasma Physics, Volume 60, Issue 5-6, June-July 2020., 2020 Abstract Advanced divertor configurations modify the magnetic geometry of the divertor to achieve a combination of strong magnetic flux expansion, increased connection length and higher divertor volume—to improve detachment stability, neutral/impurity confinement and heat‐channel broadening.
Thomas Body +4 more
wiley +1 more source
Integration of kinetic ions in a three‐dimensional Monte‐Carlo neutral transport code
Contributions to Plasma Physics, Volume 60, Issue 5-6, June-July 2020., 2020 Abstract Charged particles of species different from the major constituents of a plasma might not reach local thermodynamic equilibrium during their lifespan. Such low collisional ions render the often‐used fluid description, assuming Maxwellian velocity distribution, as insufficient. Hence, kinetic treatment of such minorities becomes inevitable.
Friedrich Schluck
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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 +10 more
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Ideal MHD theory of low-frequency Alfven waves in the H-1 Heliac [PDF]
, 2012 A part analytical, part numerical ideal MHD analysis of low-frequency Alfven wave physics in the H-1 stellarator is given. The three-dimensional, compressible ideal spectrum for H-1 is presented and it is found that despite the low beta (approx.
B D Blackwell +11 more
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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 +27 more
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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. +4 more
core +2 more sources
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 +12 more
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Perturbing an axisymmetric magnetic equilibrium to obtain a quasi-axisymmetric stellarator
, 2020 It is demonstrated that finite-pressure, approximately quasi-axisymmetric stellarator equilibria can be directly constructed (without numerical optimization) via perturbations of given axisymmetric equilibria.
Plunk, G. G.
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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 +12 more
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