SHINE: Turbulence and Perpendicular Ion Heating in the Corona and Solar Wind

闪耀：日冕和太阳风中的湍流和垂直离子加热

• 批准号: 0851005
• 负责人: Benjamin Chandran
• 金额: $ 34.61万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0851005&HistoricalAwards=false
• 关键词: SHINE; Turbulence; Perpendicular; Ion; Heating

The PI will investigate the role of turbulent heating in the origin and dynamics of the solar wind. He will use a combination of 'weak' and 'strong' turbulence theory to investigate the strength of the so-called "quasi-parallel cascade." The small scale waves produced by the quasi-parallel cascade have very high frequencies, and can cause perpendicular ion heating via a cyclotron resonance. The PI will also use high accuracy test particle calculations to investigate perpendicular ion heating by low frequency "quasi-2D" turbulence, which is believed to be the energetically dominant component of solar wind turbulence. The PI will then incorporate these results into a 1D fluid model of the solar wind that solves for the radial evolution of the turbulence and plasma properties. He will test and validate his theoretical results by comparing the 1D fluid model to observations of the temperature profile, temperature anisotropy, and bulk flow speeds of protons, electrons, alpha particles, and minor ions in the corona and solar wind.This project addresses a key element of the Solar, Heliospheric, and INterplanetary Environment (SHINE) research program, which is to gain an understanding of the mechanisms of solar wind heating and to incorporate them into global models, with the objective of reproducing the observed properties of the solar wind. The PI is a Science Working Group Leader for the SHINE community and a new member of the SHINE Steering Committee, where he helps organize SHINE community workshops. He will continue his active involvement as an instructor at specialized summer and winter schools for graduate students, postdoctoral researchers, and advanced undergraduate students at the University of New Hampshire (UNH). By providing young scientists with specialized training and exposure to recent developments in solar physics research, these topical schools promote the integration of research and education at UNH.

PI将研究湍流加热在太阳风的起源和动力学中的作用。他将使用“弱”和“强”湍流理论的结合来研究所谓的“准平行级联”的强度。准平行级联产生的小规模波具有很高的频率，并且会通过回旋共振引起垂直离子加热。 PI还将使用高精度测试粒子计算来研究低频“ Quasi-2d”湍流的垂直离子加热，这被认为是太阳风湍流的能量主导成分。然后，PI将这些结果纳入太阳风的一维流体模型，该模型求解了湍流和等离子体特性的径向演化。 He will test and validate his theoretical results by comparing the 1D fluid model to observations of the temperature profile, temperature anisotropy, and bulk flow speeds of protons, electrons, alpha particles, and minor ions in the corona and solar wind.This project addresses a key element of the Solar, Heliospheric, and INterplanetary Environment (SHINE) research program, which is to gain an understanding of the mechanisms of solar wind heating and to将它们纳入全球模型，目的是重现太阳风的观察到的特性。 PI是Shine Community的科学工作组领导者，也是Shine指导委员会的新成员，他帮助组织Shine Community Workshops。他将继续在新罕布什尔大学（UNH）的研究生，博士后研究人员和高级本科生的专业夏季和冬季学校的教练中积极参与。通过为年轻的科学家提供专门的培训和对太阳能物理研究最新发展的暴露，这些局部学校促进了UNH的研究和教育的整合。