Results 11 to 20 of about 196 (131)
Enablement or Suppression of Collisionless Magnetic Reconnection by the Background Plasma Beta and Guide Field. [PDF]
Geophys Res LettAbstract How magnetic reconnection is triggered or suppressed is an important outstanding problem. By considering pinching of a current sheet that has formed at non‐equilibrium, we show that the background plasma beta is a major controlling factor in the onset and nature of magnetic reconnection.
Yoon YD +4 more
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Acoustic Rayleigh Wave Turbulence in Soft Viscoelastic Matter. [PDF]
Adv Sci (Weinh)Discrete acoustic Rayleigh wave turbulence (DARWT) is observed on the free surface of viscoelastic materials under monochromatic excitation. Governed by bulk shear rigidity supporting inertial modes against surface tension, the nonlinear Rayleigh waves exhibit distinct power‐law scaling and turbulence features in their Kolmogorov–Zakharov spectra. This
Kharbedia M +4 more
europepmc +2 more sources
On nonlinear scattering of drift wave by toroidal Alfvén eigenmode in tokamak plasmas
Nuclear Fusion, 2023 Using electron drift wave (eDW) as a paradigm model, we have investigated analytically direct wave–wave interactions between a test DW and ambient toroidal Alfvén eigenmodes (TAEs) in toroidal plasmas, and their effects on the stability of the eDW.
Liu Chen, Zhiyong Qiu, Fulvio Zonca
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Nuclear Fusion, 2023 To avoid or mitigate runaway electron (RE) beams in ITER, RE-driven instabilities are actively studied as a complimentary technique to massive material injection.
A. Lvovskiy +10 more
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Frontiers in Physics, 2023 Following recent observations of unstable Toroidal Alfvén Eigenmodes (TAEs) in a counter-current Neutral Beam Injection (NBI) scenario developed in TCV, an in-depth analysis of the impact of such modes on the global confinement and performance is carried
S. Mazzi +17 more
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Toroidal Alfvén eigenmodes observed in low power JET deuterium–tritium plasmas
Nuclear Fusion, 2023 The Joint European Torus recently carried out an experimental campaign using a plasma consisting of both deuterium (D) and tritium (T). We observed a high-frequency mode using a reflectometer and an interferometer in a D-T plasma heated with low power ...
H.J.C. Oliver +15 more
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Nonlinear saturation of reverse shear Alfvén eigenmodes induced by kinetic electrons
Nuclear Fusion, 2022 A strong nonlinear saturation mechanism of the reverse shear Alfvén eigenmode (RSAE) induced by thermal electrons is observed in gyrokinetic ${\delta}f$ particle-in-cell simulation.
Lei Ye, Yang Chen, Guoyong Fu
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Nuclear FusionThe paper presents the original observation of high frequency Alfvén eigenmode excited by fast minority hydrogen ions accelerated by ion cyclotron range of frequency waves in EAST. The frequency of high frequency Alfvén eigenmodes is around $0.75\sim 0.8
Lunan Liu +5 more
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Fundamental Poloidal Wave Event Extending From Midnight to Dawn
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract Fundamental poloidal (P1) waves are a class of magnetospheric standing Alfvén waves characterized by field line oscillations in the meridional plane. P1 waves are infrequently excited in the ring current region and are believed to be the source of giant pulsations (Pgs) observed on the ground. Pgs are mostly detected on the morning side with a
Kazue Takahashi +2 more
wiley +1 more source
Observation of modes in the sub-cyclotronic range of frequencies in JET
Nuclear FusionThe excitation of modes in the JET tokamak in the sub-cyclotronic range of frequencies (frequencies comprised between the Alfvén frequency and the cyclotron frequency) is for the first time reported.
F. Nabais +7 more
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