Wave-Particle Interactions in the Solar-Terrestrial Environment

这笔赠款将支持对各种相关的自然发生过程的研究，这些过程涉及高能电子与日地环境中的电磁波和等离子体波的相互作用。这些过程对于我们理解太阳下部日冕和太阳风发出的与太阳耀斑有关的辐射，以及我们理解电子流的传播、稳定性和发射特性，包括起源于太阳的流、周围太阳风中的高能电子、行星弓形激波附近产生的电子束、并在地球极光区沉淀电子。它的目的是研究由电子速度各向异性(“哨子束模式”、哨声、“韦贝尔”模等)和平行能量反转(电子等离子体波等)驱动的各种波不稳定性。磁化等离子体中波和电子分布的非线性演化，如极光和下太阳日冕，将使用最先进的超级计算机模拟来处理。预计它将对第三类事件期间太阳风中的电子流以及地球弓形激波附近的电子束所激发的完全发育的强等离子体波湍流进行首次三维研究。拟议中的研究强调基本的等离子体过程，这些过程强烈植根于对波和粒子的卫星观测。

This grant will support a study of a variety of related naturally-occurring processes involving the interaction of high- energy electrons with electromagnetic waves and with plasma waves in the solar-terrestrial environment. These processes are important for our understanding of solar-flare-related radiation emitted from the sun's lower corona and from the solar wind, and for our understanding of the propagation, stability and emission properties of electron streams, including streams of solar origin, high-energy electrons in the ambient solar wind, electron beams produced near planetary bowshocks, and precipitating electrons in Earth's auroral zones. It is intended investigate a variety of wave instabilities driven by electron velocity anisotropy ("whistler-beam-modes", whistlers, "Weibel" modes, etc.), and by parallel energy inversion (electron plasma waves, etc.). The nonlinear evolution of waves and electron distributions in magnetized plasmas, such as the aurora and the lower solar corona, will be treated using state-of-the-art supercomputer simulations. It is expected to produce the first three-dimensional studies of fully-developed strong plasma wave turbulence excited by electron streams in the solar wind during Type III events, and by electron beams near Earth's bowshock. The proposed research emphasizes basic plasma processes which are strongly rooted in satellite observations of waves and particles.