The effects of nonthermal electron distributions on ion-temperature-gradient driven drift-wave instabilities in electron-ion plasma

Batool, Nazia; Masood, W.; Mirza, Arshad M.

doi:10.1063/1.4742990

Cited by 20 publications

(17 citation statements)

References 35 publications

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“…Through their sensitivity to geometry and material properties, the surface plasmon serves as a local probe of coherent acoustic phonons. In time domain spectroscopy (pump-probe), the pump excites a plasmon which rapidly decays to non-thermalized electrons [5]. The electrons thermalize through scattering processes on a sub picosecond timescale raising the electronic temperature and changing the interband transition rates.…”

Section: Resultsmentioning

confidence: 99%

Ultrafast Dynamics of Heat Generation in Plasmonic Nanostructures

Zhang¹

2014

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Section: Resultsmentioning

confidence: 99%

Ultrafast Dynamics of Heat Generation in Plasmonic Nanostructures

Zhang¹

2014

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“…[23] Nonthermal electron distributions are also found to affect the linear properties of ITG-driven modes in the presence of magnetic shear. [24] Mirza et al studied the formation of nonlinear vortex structures in ITG mode in the presence of magnetic shear and suprathermal electrons. [25] They found that presence of hotter electrons in the system modify the scale length of vortex structures.…”

Section: Introductionmentioning

confidence: 99%

Formation of solitons and shocks in toroidal ion temperature gradient mode in the presence ofnon‐Maxwellianelectrons

Hassan

Masood

Mirza

et al. 2021

Contributions to Plasma Physics

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Linear and nonlinear phenomena are investigated in toroidal ion temperature gradient (TITG)-driven pure drift mode. The model includes inhomogeneity in background magnetic field, ion temperature, and density. Finite Larmor radius effect is incorporated to understand the effect of low-frequency wave on ion dynamics. Electrons are assumed to follow nonthermal distribution, that is, kappa and Cairns distributions. Dispersion relation is obtained to analyse the linear behaviour of the TITG mode in the presence of non-Maxwellian electron distribution. In the nonlinear regime, exact solutions (soliton and shocks) are obtained (in dispersive and dissipative medium respectively) by using functional variable method to solve the nonlinear partial differential equation obtained for the system under consideration. Graphical illustrations are used to exhibit the characteristics of linear and nonlinear structures and their dependence on different physical parameters. It is observed that for TITG-driven pure drift mode, rarefactive solitons are formed for both thermal and nonthermal electron distributions. It is also observed that variation of electrons from standard thermal distribution affects the propagation characteristics of linear and nonlinear structures in TITG-driven modes. Results of our investigations will be helpful to understand the low-frequency waves in inhomogeneous plasmas in the presence of nonthermal electron distributions which are frequently observed by satellite missions and are also observed in laboratory plasmas.

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“…Batool et al. [27] demonstrated the effect of nonthermal electron distribution on ITG driven drift instabilities They found significant modification in ITG driven drift mode due to presence of non-thermal distributed electrons.…”

Section: Introductionmentioning

confidence: 99%

Resistive drift instabilities for thermal and non-thermal electron distributions in electron-ion plasma

Rehman

2018

Heliyon

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Local dispersion relations for resistive drift mode in a nonuniform magnetize plasma are derived for thermal and non-thermal distribution of electrons. The coupled mode equations are obtained by using Braginskii's transport equations for ions and electrons with thermal as well as non-thermal (Cairns and kappa) distribution for electrons. The dispersion relations are then analyzed both analytically as well as numerically for all distributions. It is found that growth rate is highest for Maxwellian, Intermediate for kappa and lowest for Cairns distribution. It has been found that increasing values of Γ (which estimate population of non-thermal electrons) for Cairn distributed electrons are able to stabilize the mode. Furthermore, increasing the values of κ (which is spectral index) for the kappa distributed electrons have destabilizing effects on the mode. The result might be useful in the interpretation of electromagnetic fluctuations in nonuniform magneto-plasma in which resistivity is a key element in calculation of drift instabilities in the presence of thermal or nonthermal electron distributions, such systems are extensively observed in laboratory as well as space plasma.

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The effects of nonthermal electron distributions on ion-temperature-gradient driven drift-wave instabilities in electron-ion plasma

Cited by 20 publications

References 35 publications

Ultrafast Dynamics of Heat Generation in Plasmonic Nanostructures

Ultrafast Dynamics of Heat Generation in Plasmonic Nanostructures

Formation of solitons and shocks in toroidal ion temperature gradient mode in the presence ofnon‐Maxwellianelectrons

Resistive drift instabilities for thermal and non-thermal electron distributions in electron-ion plasma

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