SHINE: Self-Consistent Resonant-Cyclotron Heating of Protons and Alpha Particles in the Solar Wind and Solar Corona

这个为期3年的SHINE项目预计将产生新的、更详细的带电粒子（质子和α粒子）在湍流驱动的无碰撞等离子体（如日冕和太阳风）中加热的动力学模型。通过利用一种新的计算技术，这些研究将确定在α粒子的太阳风浓度存在下波和粒子的自洽行为。该项目的研究议程直接解决了“理解或描述背景太阳风及其演变”的SHINE目标。该项目将在新罕布什尔大学良好的空间物理教育环境中进行，这使得PI和Co-I能够继续与那里的研究生和本科生进行富有成效的研究互动。SHINE项目的研究和EPO议程支持AGS部门在发现、学习、多样性和跨学科研究方面的战略目标。这个为期3年的SHINE项目的主要目标是研究离子回旋波（ICW）耗散对质子和α粒子的持续加热所产生的自一致回旋共振波粒相互作用。使用均匀的1.5D和2.5D混合模拟，项目团队将使用一种新技术来驱动ICW频谱，该技术允许波浪特性自一致地演变，而不会强加特定的波浪模式。通过这种方式，研究小组将确定在无碰撞等离子体中形成质子和α粒子分布的自洽波特性。研究人员将探索这种自洽波色散作为等离子体β和α流速度的函数，以获得适合于原位太阳风和太阳日冕洞的结果。然后，他们将把这些新信息整合到他们的运动导向中心方程中，以计算非均匀膨胀太阳风中的波和粒子演化。该项目的结果将与现场太阳风测量结果进行比较，并将为未来太阳轨道飞行器和太阳探测器Plus任务在太阳附近测量的离子分布提供预测。

This 3-year SHINE project is expected to yield new, more detailed kinetic models of the heating of charged particles (protons and alpha particles) in turbulently-driven collisionless plasmas, such as the solar corona and the solar wind. By utilizing a new computational technique, these studies will determine the self-consistent behavior of waves and particles in the presence of solar wind concentrations of alpha particles. The research agenda of this project directly addresses the SHINE goal of "understanding or characterizing the background solar wind and how it evolves." The project will be carried out within the excellent educational environment in space physics at the University of New Hampshire, which allows the PI and Co-I to continue their productive research interactions with graduate and undergraduate students there. The research and EPO agenda of this SHINE project supports the Strategic Goals of the AGS Division in discovery, learning, diversity, and interdisciplinary research.The main goal of this 3-year SHINE project is to investigate the self-consistent cyclotron-resonant wave-particle interaction resulting from continual heating of protons and alpha particles by Ion-Cyclotron Waves (ICW) dissipation. Using homogeneous 1.5D and 2.5D hybrid simulations, the project team will drive the ICW spectrum with a new technique that allows the wave properties to evolve self-consistently, without imposing particular wave modes. In this way, the team will determine the self-consistent wave properties responsible for shaping the proton and alpha-particle distributions in a collisionless plasma. The researchers will explore this self-consistent wave dispersion as a function of plasma beta and alpha streaming speed, to obtain results appropriate for the in-situ solar wind and for solar coronal holes. They will then incorporate this new information into their kinetic-guiding-center equations to compute the wave and particle evolution in the inhomogeneous expanding solar wind. The results from this project will be compared with in-situ solar wind measurements, and they will yield predictions for the ion distributions to be measured near the Sun by the future Solar Orbiter and Solar Probe Plus missions.