نتایج جستجو برای: lower hybrid waves

تعداد نتایج: 980594  

Journal: :Geophysical Research Letters 2021

Inner magnetospheric magnetosonic waves are usually considered to grow from the near-equatorial ion Bernstein instability below lower hybrid resonance frequency and contribute significantly radiation belt electron dynamics. We here present unusual observations of extending above local in midlatitude ?15° plasmasphere after substorm proton injection. Linear analyses ray-tracing simulations show ...

2017
John Z. G. Ma

EEG signals are records of nonlinear solitary waves in human brains. The waves have several types (e.g., α, β, γ, θ, δ) in response to different levels of consciousness. They are classified into two groups: Group-1 consists of complex storm-like waves (α, β, and γ); Group-2 is composed of simple quasilinear waves (θ and δ). In order to elucidate the mechanism of EEG wave formation and propagati...

2007
J. D. HUBA

Recent satellite observations of electrostatic and magnetic noise in the distant magnetotail (Gurnett et al., 1976) can be explained by the excitation of the lower-hybrid-drift instability. In particular, it is shown that (1) existence conditions for the lower-hybrid-drift instability can be met, (2) the observed frequency spectra and polarization are in good agreement with the predictions of l...

2008
J. A. Goetz

Inductive current profile modification in MST has been successful in reducing fluctuations and transport but is transient and radially non-localized. Current profile control with rf waves offers steady and more precise control. Studies of lower hybrid wave and electron Bernstein wave injection are underway. The lower hybrid antenna has coupled 125 kW to the plasma. Hard x-ray emission with ener...

Journal: :Nature communications 2010
R Cesario L Amicucci A Cardinali C Castaldo M Marinucci L Panaccione F Santini O Tudisco M L Apicella G Calabrò C Cianfarani D Frigione A Galli G Mazzitelli C Mazzotta V Pericoli G Schettini A A Tuccillo

Progress in thermonuclear fusion energy research based on deuterium plasmas magnetically confined in toroidal tokamak devices requires the development of efficient current drive methods. Previous experiments have shown that plasma current can be driven effectively by externally launched radio frequency power coupled to lower hybrid plasma waves. However, at the high plasma densities required fo...

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