scholarly journals Tunable THz Pulses Generation in Non-Equilibrium Magnetized Plasma: The Role of Plasma Kinetics

Photonics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 82
Author(s):  
Anna V. Bogatskaya ◽  
Nelli E. Gnezdovskaia ◽  
Alexander M. Popov
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Velocity Distribution Function ◽  
Magnetized Plasma ◽  
Electron Velocity ◽  
Kinetic Properties ◽  
Central Frequency ◽  
Electron Velocity Distribution ◽  
Electron Velocity Distribution Function

In this paper the theoretical model to consider the influence of kinetic properties of nonequilibrium two-color plasma during the THz pulses generation in the presence of static magnetic field is developed. It is shown that applying a static magnetic field on a gas along the direction of propagation of an ionizing two-color laser pulse allows one to produce two-frequency emissions in THz range with tunable central frequency and bandwidth, which are strongly dependent on electron velocity distribution function (EVDF) formed in the plasma as well as relations between collisional, plasma and cyclotron frequencies.

On oscillating electric dipoles immersed in a hot plasma

1968 ◽  
Vol 2 (3) ◽  
pp. 437-448 ◽  
Author(s):  
S. R. Watson
Keyword(s):  
Magnetic Field ◽  
Distribution Function ◽  
Electric Fields ◽  
Plasma Frequency ◽  
Velocity Distribution Function ◽  
Electron Velocity ◽  
Electron Velocity Distribution ◽  
Electron Velocity Distribution Function ◽  
Hot Plasma ◽  
Electric Dipoles

In this paper the electric fields of an infinitesimal dipole oscillating in a hot plasma are derived in the absence of an external magnetic field; explicit expressions are obtained by making an approximation on the background electron velocity distribution function. These results are applied to investigate the resonance observed at the plasma frequency, and to estimate the radiation resistance of the dipole.

The formation and evolution of the electron strahl in the inner heliosphere

2021 ◽  
Author(s):  
Seong-Yeop Jeong ◽  
Daniel Verscharen ◽  
Vocks Christian ◽  
Christopher Owen ◽  
Robert Wicks ◽  
...  
Keyword(s):  
Solar Wind ◽  
Velocity Distribution Function ◽  
Electron Velocity ◽  
Electron Velocity Distribution ◽  
Electron Velocity Distribution Function ◽  
Coulomb Collisions ◽  
Spiral Geometry ◽  
Formation And Evolution ◽  
Radial Evolution ◽  
Inner Heliosphere

<p>The electrons in the solar wind exhibit an interesting kinetic substructure with many important implications for the overall energetics of the plasma in the heliosphere. We are especially interested in the formation and evolution of the electron strahl, a field-aligned beam of superthermal electrons, in the heliosphere. We develop a kinetic transport equation for typical heliospheric conditions based on a Parker-spiral geometry of the magnetic field. We present the results of our theoretical model for the radial evolution of the electron velocity distribution function (VDF) in the solar wind. We study the effects of the adiabatic focusing of energetic electrons, wave-particle interactions, and Coulomb collisions through a generalized kinetic equation for the electron VDF. We compare and contrast our results with the observed effects in the electron VDFs from space missions that explore the radial evolution of electrons in the inner heliosphere such as Helios, Parker Solar Probe, and Solar Orbiter.</p>

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