U.S.-Japan Cooperative Research: Study on Current Loop Coalescence by 3-D Electromagnetic Particle Code

该奖项支持为期两年的合作研究项目 爱荷华州大学的西川健一教授 日本富山大学教授酒井淳一。 也 参与该项目的是托尔斯滕·诺伊伯特教授， 密歇根大学和富山大学的Shinji Koide。 最近，日美卫星“Yohkoh”获得了新的 太阳耀斑等离子体的观测。 特别是 电流环的合并已经在活动的 太阳上的区域，由Sakai等人提出， 1982. 这一观察指出了他们的重要性。 认为太阳耀斑是由 电流回路 该研究项目将模拟 电流回路的合并通过一个三维的 电磁粒子模拟程序 理论和MHD模拟。 主要课题是调查 动力学过程，如能量转移，加速 高能粒子和电磁辐射 电流回路的聚结不能用磁流体动力学研究 模拟

This awards supports a two-year collaborative research project between Professor Ken-Ichi Nishikawa of the University of Iowa and Professor Jun-ichi Sakai of Toyama University, Japan. Also involved in the project are Professor Torsten Neubert of the University of Michigan and Shinji Koide of Toyama University. Recently the Japan-U.S. satellite "Yohkoh" has obtained new observations of solar flare plasmas. In particular, the coalescences of current loops have been observed in the active regions on the Sun, which were proposed by Sakai et al since 1982. This observation has pointed out the importance of their idea that the solar flare is generated by the coaslescence of current loops. This research project will model the dynamics of the coalescence of current loops by means of a 3-D electromagnetic (E-M) particle simulation code associated with theories and MHD simulations. The main topic is to investigate the kinetic processes such as energy transfer, acceleration of high-energy particles, and electromagnetic emissions associated with the current loop coalescence that cannot be studied by MHD simulations.