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Parallel propagating modes and anomalous spatial damping in the ultra-relativistic electron plasma with arbitrary degeneracy |
| H Farooq1, M Sarfraz1, Z Iqbal1, G Abbas1, H A Shah2 |
1. Department of Physics, Government College University, Lahore 54000, Pakistan;
2. Government College University, Lahore 54000, Pakistan |
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Abstract The dispersion relations of parallel propagating modes (Langmuir mode, right and left handed circular polarized waves) in the weak magnetic field limit|ω-k·v|>>Ω are considered for ultra-relativistic arbitrary degenerate electron plasma. The results are presented in terms of moments of Fermi-Dirac distribution. The increase in the electron equilibrium number density from negative large (weakly degenerate) to positive large (highly degenerate) values of μ/Te is observed (where μ is the electron chemical potential and Te is the electron thermal energy). As a result, shifting of the cutoff points in all the real dispersion branches towards the higher values and increasing in the band gap between unmagnetized longitudinal and transverse modes in k-space are examined. Also, the suppression of the weak magnetic field effects in weakly magnetized right handed and left handed circular polarized waves and a decrease in the longitudinal and transverse screening effects are observed in the graphical patterns due to an increase in the equilibrium number density.
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Received: 12 May 2017
Revised: 30 September 2017
Accepted manuscript online:
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PACS:
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03.75.Ss
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(Degenerate Fermi gases)
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52.27.Ny
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(Relativistic plasmas)
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52.35.Hr
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(Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid))
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Corresponding Authors:
G Abbas
E-mail: gohar.abbas@gcu.edu.pk
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Cite this article:
H Farooq, M Sarfraz, Z Iqbal, G Abbas, H A Shah Parallel propagating modes and anomalous spatial damping in the ultra-relativistic electron plasma with arbitrary degeneracy 2017 Chin. Phys. B 26 110301
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