The Theory of Magnetic Reconnection Onset: Three Dimensional and Diamagnetic Effects

磁重联起始理论：三维和抗磁效应

• 批准号: 0902479
• 负责人: Paul Cassak
• 金额: $ 36万
• 依托单位: West Virginia University Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0902479&HistoricalAwards=false
• 关键词: Theory; Magnetic; Reconnection; Onset; Three

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The proposed research will examine the role of three-dimensional and diamagnetic effects on the onset of magnetic reconnection in weakly collisional plasmas. Reconnection is a fundamental plasma process that converts magnetic energy into particle and flow energy in sawtooth crashes in fusion devices, solar flares, and magnetospheric substorms, making it important for topics ranging from sustainable energy to space weather. While much has been learned, fundamental questions remain unanswered, such as why reconnection often begins explosively. The objective of this proposal is to develop a quantitative understanding of three-dimensional and diamagnetic effects on reconnection onset. The two parts to this project interweave large-scale two-fluid simulations, comparisons with laboratory data, and development of analytical theory. The condition for reconnection onset in three-dimensions is studied using simulations and comparisons with VTF data under collaboration with Prof. J. Egedal of MIT. Diamagnetic effects are studied using simulations and analytic theory. Predictions for the sawtooth crash will be made and compared to DIII-D tokamak data. The proposed activity promotes training and learning through the funding of two graduate students, which will help to establish a faculty-run research group dedicated to theory and simulations of space and laboratory plasmas in the Department of Physics at West Virginia University. The outreach portion will produce materials for the WVU Tomchin Planetarium for use in presentations to the general public and school groups for outreach and recruiting.This proposal was submitted to the NSF-DoE Partnership in Plasma Science and Engineering joint solicitation 08-589. This award is being funded jointly by the Division of Physics of the Mathematical and Physical Sciences Directorate and by Atmospheric Sciences Division of the Geosciences Directorate

该奖项由2009年《美国复苏和再投资法案》（公共法111-5）资助。拟议的研究将探讨三维和抗磁效应对弱碰撞等离子体中磁重联开始的作用。重联是一个基本的等离子体过程，它将磁能转化为粒子和流动能量，在聚变装置、太阳耀斑和磁层亚暴中发生碰撞，使其对从可持续能源到空间天气的主题非常重要。虽然已经了解了很多，但一些基本问题仍然没有答案，比如为什么重新连接经常以爆炸性的方式开始。这个建议的目的是发展一个定量的了解三维和抗磁效应的重联发病。这个项目的两个部分交织在一起，大规模的双流体模拟，与实验室数据的比较，以及分析理论的发展。与麻省理工学院的J. Egedal教授合作，通过模拟和与VTF数据的比较，研究了三维重联开始的条件。抗磁效应进行了研究，使用模拟和分析理论。将对托卡马克撞击进行预测，并与DIII-D托卡马克数据进行比较。拟议的活动通过资助两名研究生来促进培训和学习，这将有助于在西弗吉尼亚大学物理系建立一个由学院管理的研究小组，专门研究空间和实验室等离子体的理论和模拟。外展部分将为WVU Tomchin天文馆制作材料，用于向公众和学校团体进行外展和招聘。该提案已提交给NSF-DoE等离子体科学与工程合作伙伴关系联合征集08-589。该奖项由数学和物理科学理事会物理司和地球科学理事会大气科学司共同资助