Parallel propagating modes and anomalous spatial damping in the ultra-relativistic electron plasma with arbitrary degeneracy

• Published in: Chinese physics B 2017-11, Vol.26 (11), p.76-82
• Main Authors: Farooq, H, Sarfraz, M, Iqbal, Z, Abbas, G, Shah, H A
• Format: Article
• Language: English
• Subjects: degenerate Fermi gases; electromagnetic waves; k空间; relativistic plasmas; 传播模式; 反常; 弱简并; 电子等离子体; 相对论性; 费米-狄拉克分布; 阻尼
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/26/11/110301

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｜ 〉〉 ？ 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.