scholarly journals Pair plasma instability in homogeneous magnetic guide fields

2020 ◽  
Vol 27 (10) ◽  
pp. 102111
Author(s):  
M. J. Pueschel ◽  
R. D. Sydora ◽  
P. W. Terry ◽  
B. Tyburska-Pueschel ◽  
M. Francisquez ◽  
...  
Keyword(s):  
Plasma Instability ◽  
Pair Plasma

scholarly journals Preferential acceleration of positrons by a filamentation instability between an electron–proton beam and a pair plasma beam

2020 ◽  
Vol 27 (12) ◽  
pp. 122102
Author(s):  
M. E. Dieckmann ◽  
S. J. Spencer ◽  
M. Falk ◽  
G. Rowlands
Keyword(s):  
Proton Beam ◽  
Plasma Beam ◽  
Pair Plasma ◽  
Filamentation Instability

Study of solitary waves in e-p pair plasma: Effect of weakly relativistic species

2013 ◽  
Author(s):  
Rakhee Malik ◽  
Hitendra K. Malik ◽  
Subhash C. Kaushik
Keyword(s):  
Solitary Waves ◽  
Pair Plasma ◽  
Plasma Effect

Instability of tangential discontinuities in pinching plasmas

1999 ◽  
Vol 62 (1) ◽  
pp. 117-123 ◽  
Author(s):  
S. P. TSYBENKO
Keyword(s):  
Dispersion Relation ◽  
Simple Model ◽  
Current Pulse ◽  
Current Density ◽  
Strong Dependence ◽  
Plasma Instability ◽  
Tangential Discontinuity ◽  
Instability Increment ◽  
Tangential Discontinuities ◽  
A Current

A new mechanism for the formation of pinching plasma instability related to a tangential discontinuity is discussed. With this in mind we use a simple model of the Davydov–Zakharov class. It appears that there is a strong dependence of the instability increment on current density, resulting from the corresponding dispersion relation. Modulation of a current pulse is shown to be a possible way of stabilizing powerful discharges.

scholarly journals Beam instabilities in a magnetized pair plasma

1999 ◽  
Vol 62 (1) ◽  
pp. 65-86 ◽  
Author(s):  
MAXIM LYUTIKOV
Keyword(s):  
Growth Rates ◽  
Particle Interaction ◽  
Kinetic Regime ◽  
Pulsar Magnetosphere ◽  
Pair Plasma ◽  
Electron Positron ◽  
Pulsar Radiation ◽  
Radiation Generation ◽  
Field Lines ◽  
Beam Instabilities

Beam instabilities in the strongly magnetized electron–positron plasma of a pulsar magnetosphere are considered. We analyse the resonance conditions and estimate the growth rates of the Cherenkov and cyclotron instabilities of the ordinary (O), extraordinary (X) and Alfvén modes in two limiting regimes: kinetic and hydrodynamic. The importance of the different instabilities as a source of coherent pulsar radiation generation is then estimated, taking into account the angular dependence of the growth rates and the limitations on the length of the coherent wave–particle interaction imposed by the curvature of the magnetic field lines. We conclude that in the pulsar magnetosphere, Cherenkov-type instabilities occur in the hydrodynamic regime, while cyclotron-type instabilities occur in the kinetic regime. We argue that electromagnetic cyclotron-type instabilities on the X, O and probably Alfvén waves are more likely to develop in the pulsar magnetosphere.

Comment on ‘Propagation of solitary waves and shock wavelength in the pair plasma (J. Plasma Phys. 78, 525–529, 2012)’

2014 ◽  
Vol 80 (3) ◽  
pp. 513-516
Author(s):  
Frank Verheest
Keyword(s):  
Shock Wave ◽  
Solitary Wave ◽  
Solitary Waves ◽  
Plasma Phys ◽  
Theoretical Underpinning ◽  
Pair Plasma ◽  
Electrons And Positrons ◽  
Small Dissipation ◽  
Pseudopotential Approach ◽  
Wave Properties

In a recent paper ‘Propagation of solitary waves and shock wavelength in the pair plasma (J. Plasma Phys. 78, 525–529, 2012)’, Malekolkalami and Mohammadi investigate nonlinear electrostatic solitary waves in a plasma comprising adiabatic electrons and positrons, and a stationary ion background. The paper contains two parts: First, the solitary wave properties are discussed through a pseudopotential approach, and then the influence of a small dissipation is intuitively sketched without theoretical underpinning. Small dissipation is claimed to lead to a shock wave whose wavelength is determined by linear oscillator analysis. Unfortunately, there are errors and inconsistencies in both the parts, and their combination is incoherent.

Effects of Wire Morphology on Plasma Instability in Z-Pinches

2005 ◽  
Author(s):  
M.D. Johnston ◽  
T.S. Strickler ◽  
M.C. Jones ◽  
R. Gilgenbach ◽  
Y.y. Lau ◽  
...  
Keyword(s):  
Plasma Instability

Observation of Plasma Instability with Rotational Effects in a Mirror Machine

1963 ◽  
Vol 6 (11) ◽  
pp. 1537 ◽  
Author(s):  
W. A. Perkins ◽  
R. F. Post
Keyword(s):  
Plasma Instability ◽  
Mirror Machine
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