The effect of shear flow and the density gradient on the Weibel instability growth rate in the dense plasma

2018 ◽  
Vol 25 (2) ◽  
pp. 022122
Author(s):  
S. Amininasab ◽  
R. Sadighi-Bonabi ◽  
F. Khodadadi Azadboni
Keyword(s):  
Growth Rate ◽  
Shear Flow ◽  
Density Gradient ◽  
Dense Plasma ◽  
Instability Growth Rate ◽  
Weibel Instability ◽  
Instability Growth

scholarly journals The Quantum Effects Role on Weibel Instability Growth Rate in Dense Plasma

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
M. Mahdavi ◽  
F. Khodadadi Azadboni
Keyword(s):  
Growth Rate ◽  
Density Gradient ◽  
Energy Deposition ◽  
Quantum Effects ◽  
Instability Growth Rate ◽  
Tunneling Effect ◽  
Deposition Mechanism ◽  
Weibel Instability ◽  
Density Perturbations ◽  
Instability Growth

The Weibel instability is one of the basic plasma instabilities that plays an important role in stopping the hot electrons and energy deposition mechanism. In this paper, combined effect of the density gradient and quantum effects on Weibel instability growth rate is investigated. The results have shown that, by increasing the quantum parameter, for large wavelengths, the Weibel instability growth rate shrinks to zero. In the large wavelengths limit, the analysis shows that quantum effects and density gradient tend to stabilize the Weibel instability. The density perturbations have decreased the growth rate of Weibel instability in the near corona fuel,η>0.1. In the small wavelengths limit, for the density gradient,η<0.1, the tunneling quantum effects increase anisotropy in the phase space. The quantum tunneling effect leads to an unexpected increase in the Weibel instability growth rate.

scholarly journals The Study of Thermal Conditions on Weibel Instability

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
M. Mahdavi ◽  
H. Khanzadeh
Keyword(s):  
Growth Rate ◽  
Thermal Conditions ◽  
Ion Scattering ◽  
Weibel Instability ◽  
Anisotropic Temperature ◽  
Instability Growth ◽  
Limiting Condition ◽  
Limiting Case ◽  
Background Ions ◽  
Electromagnetic Instability

Weibel electromagnetic instability has been studied analytically in relativistic plasma with high parallel temperature, where|α=(mc2/T∥)(1+p^⊥2/m2c2)1/2|≪1and while the collision effects of electron-ion scattering have also been considered. According to these conditions, an analytical expression is derived for the growth rate of the Weibel instability for a limiting case of|ζ=α/2(ω′/ck)|≪1, whereω′is the sum of the wave frequency of instability and the collision frequency of electrons with background ions. The results show that in the limiting conditionα≪1there is an unusual situation of the Weibel instability so thatT∥≫T⊥, while in the classic Weibel instabilityT∥≪T⊥. The obtained results show that the growth rate of the Weibel instability will be decreased due to an increase in the number of collisions and a decrease in the anisotropic temperature by the increasing of plasma density, while the increase of the parameterγ^⊥=(1+p^⊥2/m2c2)1/2leads to the increase of the Weibel instability growth rate.

scholarly journals Orbit width scaling of TAE instability growth rate

1995 ◽  
Author(s):  
H.V. Wong ◽  
H.L. Berk ◽  
B.N. Breizman
Keyword(s):  
Growth Rate ◽  
Instability Growth Rate ◽  
Instability Growth

Numerical investigations on the effects of geometrical parameters on free electron laser instability

2008 ◽  
Vol 74 (6) ◽  
pp. 741-747
Author(s):  
B. S. SHARMA ◽  
N. K. JAIMAN
Keyword(s):  
Growth Rate ◽  
Electron Beam ◽  
Free Electron ◽  
Free Electron Laser ◽  
Instability Growth Rate ◽  
Magnetized Plasma ◽  
Geometrical Parameters ◽  
Uniform Density ◽  
Backward Wave Oscillator ◽  
Instability Growth

AbstractIn this paper we numerically investigate the effects of various geometrical parameters of a backward wave oscillator (BWO), filled with a magnetized plasma of uniform density and driven by a mild relativistic solid electron beam, on the instability growth rate (Γ) of a free electron laser (FEL). The FEL instability is numerically calculated and the result is compared with the instability growth rate of an annular electron beam for the same set of parameters. The instability growth for a solid electron beam scales inversely to the seventh power of relativistic gamma factor γ0 and directly proportional to the corrugation amplitude.

Kinetic study of instability growth rate in a helicon plasma discharge source

2017 ◽  
Vol 57 (6-7) ◽  
pp. 272-281
Author(s):  
Rokhsare Jaafarian ◽  
Alireza Ganjovi ◽  
Gholam Reza Etaati
Keyword(s):  
Growth Rate ◽  
Kinetic Study ◽  
Plasma Discharge ◽  
Instability Growth Rate ◽  
Helicon Plasma ◽  
Discharge Source ◽  
Instability Growth

Ab initio determination of the instability growth rate of warm dense beryllium-deuterium interface

2015 ◽  
Vol 22 (10) ◽  
pp. 102702 ◽  
Author(s):  
Cong Wang ◽  
Zi Li ◽  
DaFang Li ◽  
Ping Zhang
Keyword(s):  
Growth Rate ◽  
Ab Initio ◽  
Instability Growth Rate ◽  
Instability Growth
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