Sloshing ion distribution function in a minimum B mirror field

2005 ◽  
Vol 12 (2) ◽  
pp. 022504 ◽  
Author(s):  
O. Ågren ◽  
N. Savenko
Keyword(s):  
Distribution Function ◽  
Ion Distribution

Direct measurements of ion distribution function in loss cones and plasma potential in the tandem mirror (oral)

1997 ◽  
Vol 34-35 ◽  
pp. 617-620 ◽  
Author(s):  
Kameo Ishii ◽  
Toshiki Takahashi ◽  
Akira Abe ◽  
Nagayoshi Kikuno ◽  
Tetsuya Goto ◽  
...  
Keyword(s):  
Distribution Function ◽  
Plasma Potential ◽  
Ion Distribution ◽  
Tandem Mirror ◽  
Direct Measurements

Magnetosonic solitons in space plasmas: dark or bright solitons?

2007 ◽  
Vol 73 (6) ◽  
pp. 981-992 ◽  
Author(s):  
O. A. POKHOTELOV ◽  
O.G. ONISHCHENKO ◽  
M. A. BALIKHIN ◽  
L. STENFLO ◽  
P. K. SHUKLA
Keyword(s):  
Magnetic Field ◽  
Distribution Function ◽  
Velocity Distribution Function ◽  
Mhd Equations ◽  
Space Plasmas ◽  
Ion Distribution ◽  
Loss Cone ◽  
Solitary Solution ◽  
Background Magnetic Field ◽  
The Magnetic Field

AbstractThe nonlinear theory of large-amplitude magnetosonic (MS) waves in highβ space plasmas is revisited. It is shown that solitary waves can exist in the form of ‘bright’ or ‘dark’ solitons in which the magnetic field is increased or decreased relative to the background magnetic field. This depends on the shape of the equilibrium ion distribution function. The basic parameter that controls the nonlinear structure is the wave dispersion, which can be either positive or negative. A general dispersion relation for MS waves propagating perpendicularly to the external magnetic field in a plasma with an arbitrary velocity distribution function is derived.It takes into account general plasma equilibria, such as the Dory–Guest–Harris (DGH) or Kennel–Ashour-Abdalla (KA) loss-cone equilibria, as well as distributions with a power-law velocity dependence that can be modelled by κdistributions. It is shown that in a bi-Maxwellian plasma the dispersion is negative, i.e. the phase velocity decreases with an increase of the wavenumber. This means that the solitary solution in this case has the form of a ‘bright’ soliton with the magnetic field increased. On the contrary, in some non-Maxwellian plasmas, such as those with ring-type ion distributions or DGH plasmas, the solitary solution may have the form of a magnetic hole. The results of similar investigations based on nonlinear Hall–MHD equations are reviewed. The relevance of our theoretical results to existing satellite wave observations is outlined.

scholarly journals On the Ion Distribution Function in Degenerate Electron Plasmas

2013 ◽  
Vol 8 (0) ◽  
pp. 3404050-3404050 ◽  
Author(s):  
Kohei SUGITA ◽  
Hideaki MATSUURA ◽  
Yasuyuki NAKAO
Keyword(s):  
Distribution Function ◽  
Degenerate Electron ◽  
Ion Distribution ◽  
Electron Plasmas

scholarly journals Switchback-like structures observed by Solar Orbiter

2021 ◽  
Author(s):  
Andrey Fedorov ◽  
Philippe Louarn ◽  
Christopher Owen ◽  
Lubomir Prech ◽  
Timothy Horbury ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Distribution Function ◽  
Field Data ◽  
Solar Wind Plasma ◽  
Time Interval ◽  
Ion Distribution ◽  
Time Intervals ◽  
Radial Magnetic Field ◽  
Magnetic Field Data

<p>During 27th September 2020 NASA Parker Solar Probe (PSP) and ESA-NASA Solar Orbiter (SolO) have been located around the same Carrington longitude and their latitudinal separation was very small as well. Solar wind plasma and magnetic field data obtained throughout this time interval  allows to consider that sometimes the solar wind, observed by both spacecrafts, originates from the same coronal hole region. Inside these time intervals the SolO radial magnetic field experiences several short variations similar to the "switchbacks" regularly observed by PSP. We used the SolO SWA-PAS proton analyzer data to analyze the ion distribution function variations inside such switchback-like events to understand if such events are really "remains" of the alfvenic structures observed below 60 Rs.</p>

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