Theoretical Studies of Interplanetary Magnetic Fields, Turbulence, and Cosmic Rays

行星际磁场、湍流和宇宙线的理论研究

• 批准号: 8618260
• 负责人: Jack Jokipii
• 金额: $ 25.22万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-05-01 至 1990-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8618260&HistoricalAwards=false
• 关键词: Theoretical; Studies; Interplanetary; Magnetic; Fields

An important part of the sun's influence on the Earth and planets, and on processes throughout interplanetary space, is exerted by the solar wind and its embedded magnetic field. Although significant progress has been made toward understanding these effects, wide gaps remain which provide fertile areas for theoretical research to complement the many ongoing experimental programs. The growing collection of observational data is leading to the discovery of new, subtle, and apparently fundamental relationships between the terrestrial environment and the state of the interplanetary medium. For example, possible influences of cosmic rays on global electricity have been proposed. A second example is the existence of solar-cycle effects on Earth's environment. It is not yet precisely clear just which of the sun's emissions vary over the course of a solar cycle nor is it clear how they vary. For this reason, continued investigation of the behavior of the interplanetary medium is central to a firm understanding of solar-terrestrial relationships. This grant will support continuation of a program of theoretical investigations into the properties and behavior of the interplanetary medium, with emphasis on solar-terrestrial relationships. Emphasis will be placed on the large-scale structure of the solar wind, its magnetic field, and the various manifestations of its fluctuations and turbulence. In particular, the effect of large scale magnetic field structure on cosmic ray acceleration, propagation and anisotropies will be studied. As part of this effort a Sun workstation will be acquired to facilitate supercomputer access and hence large scale numerical modelling of particle propagation in the interplanetary medium. The investigators are highly qualified in this research area.

太阳对地球影响的一个重要部分， 行星，以及整个行星际空间的过程， 由太阳风及其内部磁场产生。 尽管在理解上取得了重大进展， 尽管存在这些影响，但仍然存在巨大的差距， 理论研究，以补充许多正在进行的实验 程序. 越来越多的观测数据的收集， 从而发现了新的，微妙的， 陆地环境与 行星际介质的状态 例如可以 宇宙射线对全球电力的影响 提出了 第二个例子是太阳周期的存在 对地球环境的影响 目前还不清楚 在太阳活动的过程中， 周期也不清楚它们是如何变化的。 为此，继续 研究行星际介质的行为， 太阳系与地球之间的相互作用 关系。 这笔赠款将支持一个理论项目的继续 研究的性质和行为的 行星际介质，重点是日地 关系。 重点将放在大规模 太阳风的结构，它的磁场，以及各种 它的波动和动荡的表现。 在 特别是，大规模磁场结构对 宇宙射线的加速、传播和各向异性 研究了 作为这项工作的一部分，将购置一台Sun工作站， 便于超级计算机访问，因此大规模数值 行星际介质中粒子传播的建模。 研究人员在该研究领域具有很高的资格。