Results 71 to 80 of about 249 (184)

Stellar Oscillons

Annals of the New York Academy of Sciences, 1998
ABSTRACT: We study the weakly nonlinear evolution of acoustic instability of a plane‐parallel polytrope with thermal dissipation in the form of Newton's law of cooling. The most unstable horizontal wavenumbers form a band around zero and this permits the development of a nonlinear pattern theory leading to a complex Ginzburg‐Landau equation (CGLE ...
Umurhan, O. M., Tao, L., Spiegel, E. A.
openaire   +3 more sources

Precise stellarator quasi-symmetry can be achieved with electromagnetic coils. [PDF]

Proc Natl Acad Sci U S A, 2022
Wechsung F, Landreman M, Giuliani A, Cerfon A, Stadler G.   +4 more
europepmc   +1 more source

Ultrahigh neutral pressures in the sub-divertor of the Large Helical Device

Nuclear Fusion
In the Large Helical Device (LHD) a low temperature mode (LTM) of the helical divertor was discovered. It combines particle detachment and very large sub-divertor pressures up to 1.4 Pa. During the LTM, the electron temperature in the divertor was in the
U. Wenzel, G. Motojima, M. Kobayashi, M. Goto, Y. Hayashi, S. Masuzaki, G. Kawamura, B. Jagielski, V. Haak   +8 more
doaj   +1 more source

Statistical Analysis of Plasma Dynamics in Gyrokinetic Simulations of Stellarator Turbulence. [PDF]

Entropy (Basel), 2023
Papadopoulos AD, Anderson J, Kim EJ, Mavridis M, Isliker H.   +4 more
europepmc   +1 more source

A model for Alfvén-eigenmode-induced transport of fast ions in stellarators

Nuclear Fusion
A novel model for Alfvén-eigenmode-induced transport of fast ions in stellarators is introduced. A variety of reduced transport models exists for tokamaks, but nothing comparable currently exists for stellarators.
C. Slaby, R. Kleiber, A. Könies, M.I. Wolf, M. Borchardt   +4 more
doaj   +1 more source

Exposure of tungsten heavy alloys at high thermal loads in LHD

Nuclear Materials and Energy
Tungsten has been considered a plasma-facing material in a future fusion reactor because of its low sputtering yield and low fuel retention. It has been examined in several tokamaks.
Chandra Prakash Dhard, Suguru Masuzaki, Dirk Naujoks, Rudolf Neu, Daisuke Nagata, Mikhail Khokhlov   +5 more
doaj   +1 more source

MONKES: a fast neoclassical code for the evaluation of monoenergetic transport coefficients in stellarator plasmas

Nuclear Fusion
MONKES is a new neoclassical code for the evaluation of monoenergetic transport coefficients in stellarators. By means of a convergence study and benchmarks with other codes, it is shown that MONKES is accurate and efficient.
F.J. Escoto, J.L. Velasco, I. Calvo, M. Landreman, F.I. Parra   +4 more
doaj   +1 more source

Stellar magnetism

Stellar Magnetism affects all spectral types and exists and varies throughout the evolution of stars. Magnetic fields can affect not only the interior of stars, but also their circumstellar environments. In this chapter, we concentrate on the magnetic fields that can be measured at the surface of stars through the influence of the Zeeman effect on ...
Petit, Veronique, Oksala, Mary E.
openaire   +2 more sources

Physics of magnetic confinement fusion

EPJ Web of Conferences, 2013
Fusion is the energy source of the universe. The local conditions in the core of the Sun allow the transfer of mass into energy, which is finally released in the form of radiation.
Wagner F.
doaj   +1 more source

Review of plasma turbulence experiments. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci, 2021
Fujisawa A.
europepmc   +1 more source