Abstract—The effect of hot anisotropic plasma on the development of cyclotron instability in the near-Earth space plasma at finite plasma pressure \({{\beta }_{ \bot }}\) is studied. It is shown that the finiteness of \({{\beta }_{ \bot }}\)​ does not only modify the imaginary part of the dispersion equation which is associated with the amplification of waves but also changes the real part of this equation which describes wave propagation along the magnetic field lines. This leads to a change in the cyclotron instability increment and causes variations in the parameters of propagation of electromagnetic ion-cyclotron (EMIC) waves along a field line. The obtained results suggest that for the generation of EMIC waves in the near-Earth plasma, small values of perpendicular proton plasma pressure (\({{\beta }_{ \bot }}\)), large anisotropy values (\(A\)), and large values of \({{{{v}_{{\parallel h}}}} \mathord{\left/ {\vphantom {{{{v}_{{\parallel h}}}} {{{c}_{A}}}}} \right. \kern-0em} {{{c}_{A}}}}\) ratio are preferable.

摘要—研究了​​各向异性各向异性热对有限等离子体压力\（{{\ beta} _ {\ bot}} \）上近地空间等离子体回旋加速器不稳定性的影响。证明\（{{\ beta} _ {\ bot}} \）的有限性不仅修改了与波放大相关的色散方程的虚部，而且更改了该方程的实部，该实部描述了沿磁场线传播的波。这导致回旋加速器不稳定性增量的变化，并导致电磁离子回旋加速器（EMIC）波沿磁力线的传播参数发生变化。获得的结果表明，对于在近地等离子体中产生EMIC波，垂直质子等离子体压力的小值（\（{{beta）_ {\ bot}} \）），各向异性值大（\（A \）），以及\（{{{{v} _ {{\ parallel h}}}}} \ mathord {\ left / {\ vphantom {{{{v} _ {{\ parallel h}}} } {{{c} _ {A}}}}} \ right。\ kern-0em} {{{c} _ {A}}}} \） 比率是优选的。