电子束调制注入电离层等离子体过程中的波粒相互作用。理论与实验

Pub Date : 2021-01-01 DOI:10.15407/knit2021.06.016
N. Baranets, Y. Ruzhin, J. Vojta
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引用次数: 0

摘要

本文介绍了在Intercosmos-25空间站和其子卫星Magion-3上进行的带电粒子束注入(电子和氙离子)主动空间实验的结果。当粒子束以相对于磁场B0的相反方向注入时,电子注入是指向地球的,在这种情况下获得的。研究了来自Intercosmos-25站的电子束注入(~10 keV, 0.1 A)过程中相对于静电和电磁波激发的束等离子体不稳定性机制。第一回旋共振上横向不稳定性的发展导致了相对于注入电子(来自地球)反向传播的哨声模式波的激发。研究对象是由星载带电粒子谱仪记录的27 eV - 412 keV宽能量范围内电离层电子的束激微分通量。因此,哨声波与电离层电子通量的相互作用受到“粒子-波-粒子”等能量传递机制的刺激。并将束等离子体不稳定性的数值结果与站内和星下不同空间点记录的热等离子体参数进行了比较。纵向和横向光束等离子体不稳定性的激发将不可避免地导致它们之间的竞争,从而影响实验结果。电离层电子受激通量的数据使我们能够研究波粒相互作用的各种效应,同时考虑到纵向不稳定性的增长速度对哨子激发角及其结构的影响。这种方法是基于实验室实验的结果来确定电偶极子天线的激发哨声模式,并将光束-等离子体通道与辐射系统进行类比。主动空间实验结果证实了哨声模波的增长速度与纵梁失稳发展的相关性。
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Wave-particle interaction during electron beam-modulated injection into the ionospheric plasma. Theory and experiment
We present the results of the active space experiment with charged particle beam's injection (electrons and xenon ions) carried out onboard Intercosmos-25 station and daughter Magion-3 subsatellite. The ones are obtained under conditions when the particle beams were injected in opposite directions relative to the magnetic field B0 in such a way that the electron injection was directed towards the Earth. Mechanisms of beam-plasma instabilities relative to the excitation of electrostatic and electromagnetic waves are considered during the electron beam injection (~10 keV, 0.1 A) from the Intercosmos-25 station. Development of transverse instability on the first cyclotron resonance leads to the excitation of whistler mode waves backward-propagating relative to the injected electrons (from the Earth). The investigation object was the beam-excited differential fluxes of ionospheric electrons in a wide energetic range of 27 eV — 412 keV registered by the charged particle spectrometers onboard the Magion-3 subsatellite. Thereby, the interaction of whistler waves with ionospheric electron fluxes is stimulated by the energy transfer mechanisms such as 'particle-wave-particle'. Numerical results of beam-plasma instabilities are compared also with thermal plasma parameters registered at different space points on the station and subsatellite. Excitation of longitudinal and transverse beam-plasma instabilities will inevitably lead to their competition, which will affect the results of the experiment. The data of stimulated fluxes of ionospheric electrons allow us to investigate the various effects of the wave-particle interaction, taking into account the influence of the growth rate of longitudinal instability on the excitation angle of whistlers and their structure. This approach is based on the results of laboratory experiments to determine the pattern of excited whistlers for an electric dipole antenna and the analogy of the beam-plasma channel with the radiating system. The results of the active space experiment confirm the dependence of the growth rate of whistler mode waves on the development of longitudinal beam instability.
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