Results 41 to 50 of about 1,964 (170)

Properties of energetic-particle continuum modes destabilized by energetic ions with beam-like velocity distributions [PDF]

, 2006
Properties of energetic-particle continuum modes (EPMs) destabilized by energetic ions in tokamak plasmas were investigated using a hybrid simulation code for magnetohydrodynamics and energetic particles.
Toi K., Y. Todo
core   +2 more sources

Theory and Modeling of Large Scale Plasmapause Surface Waves

Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.
Abstract The plasmapause in Earth's magnetosphere represents the boundary between the plasma which co‐rotates with the Earth (plasmasphere), and the more tenuous plasmatrough outside. The density change across the plasmapause can be large, changing by approximately 1–2 orders of magnitude depending on the prevailing conditions. This would suggest it to
T. Elsden, D. J. Southwood, O. Allanson, M. O. Archer, M. D. Hartinger, A. N. Wright   +5 more
wiley   +1 more source

Fast magnetoacoustic waves in curved coronal loops. II, Tunneling modes [PDF]

, 2006
Aims. Fast magnetoacoustic waves in curved coronal loops are investigated and the role of lateral leakage in wave damping, which includes the mechanism of wave tunneling, is explored. Methods.
Foullon, C. (Claire), Nakariakov, V. M. (Valery M.), Verwichte, E. (Erwin)   +2 more
core   +5 more sources

Double Auroral Undulation During the Main Phase of the May 10–11, 2024 Storm

AGU Advances, Volume 6, Issue 4, August 2025.
Abstract We report the discovery of a new type of aurora, namely, double auroral undulation that occurred simultaneously on both equatorward and poleward edges of the duskside auroral oval during the main phase of the May 10–11, 2024 superstorm. Whereas the equatorward auroral undulation (EAU) has been frequently observed and well known, the poleward ...
Yongliang Zhang, Tetsuo Motoba, Larry Paxton, Robert Schaefer   +3 more
wiley   +1 more source

Counter-propagating toroidal Alfvén eigenmodes in tokamaks

Nuclear Fusion
Mechanisms of destabilization of toroidal Alfvén eigenmodes (TAEs) in tokamaks are analyzed with the aim to reveal those leading to modes propagating in the direction opposite to plasma current, i.e. counter-propagating modes (ctr-TAE). Plasmas with fast-
Ya.I. Kolesnichenko, E.D. Fredrickson, V.V. Lutsenko, A.V. Tykhyy   +3 more
doaj   +1 more source

Properties of Magnetohydrodynamic Modes in Compressively Driven Plasma Turbulence

Physical Review X, 2020
We study properties of magnetohydrodynamic (MHD) eigenmodes by decomposing the data of MHD simulations into linear MHD modes—namely, the Alfvén, slow magnetosonic, and fast magnetosonic modes.
K. D. Makwana, Huirong Yan
doaj   +1 more source

Can ECH Wave Scattering Explain the Unaccounted Electron Loss During the 17 March 2013 Geomagnetic Storm?

Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.
Abstract The interaction of electrons with electrostatic electron cyclotron harmonic (ECH) waves in the Earth's magnetosphere can lead to the scattering of plasma sheet electrons into the atmospheric loss cone, affecting the evolution of electron phase space density.
Katja Stoll, Leonie Pick, Dedong Wang, Bernhard Haas, Xing Cao, Binbin Ni, Yuri Shprits   +6 more
wiley   +1 more source

Excitation of toroidal Alfvén eigenmodes with counter-current NBI in the TCV tokamak

Nuclear Fusion, 2023
In Tokamak á Configuration Variable (TCV), unstable modes excited by resonant interaction between the shear Alfvèn waves in continuum gaps and energetic particles have been observed in scenarios with neutral beam injection (NBI).
M. Vallar, M. Dreval, M. Garcia-Munoz, S. Sharapov, J. Poley, A. N. Karpushov, P. Lauber, S. Mazzi, L. Porte, the TCV Team   +9 more
doaj   +1 more source

Driving Earth's Outer Radiation Belt With Alfvénic Turbulence

Geophysical Research Letters, Volume 52, Issue 8, 28 April 2025.
Abstract Semi‐empirical coefficients for electron transport in Alfvénic turbulence are used to drive the global evolution of energetic electron distributions through Earth's outer radiation belt. It is shown how these turbulent fields facilitate radial transport and pitch‐angle scattering that drive losses through the magnetopause, into the plasma ...
C. C. Chaston
wiley   +1 more source

V-band frequency hopping microwave reflectometer in LHD [PDF]

, 2008
In order to measure the internal structure of fluctuation, the broadband frequency tunable system, which has the ability of fast and stable hopping operation, is applied in the Large Helical Device.
A. Ejiri, K. Kawahata, K. Tanaka, T. Tokuzawa, Y. Ito   +4 more
core   +1 more source