The Alfvén resonance in pair plasmas

15th International Congress on Plasma Physics; 13th Latin American Workshop on Plasma Physics

Cramer, N.F.^1

School of Physics, University of Sydney, NSW 2006, Australia^1

关键词: Electron ion plasma;    Mode conversions;    Plasma gradients;    Pulsar magnetosphere;    Pulsar radio emissions;    Short wavelengths;    Wave absorption;    Wave-vector components;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/511/1/012007/pdf
DOI  :  10.1088/1742-6596/511/1/012007

来源: IOP

【 摘 要 】

Waves propagating obliquely in a magnetized cold pair plasma experience an approximate resonance in the wavevector component perpendicular to the magnetic field, which is the analogue of the Alfve´n resonance in normal electron-ion plasmas. Wave absorption at the resonance can take place via mode conversion to the analogue of the short wavelength inertial Alfve´n wave. The Alfve´n resonance could play a role in wave propagation in the pulsar magnetosphere leading to pulsar radio emission. Ducting of waves in strong plasma gradients may occur in the pulsar magnetosphere, which leads to the consideration of Alfve´n surface waves, whose energy is concentrated in the region of strong gradients.