Magnetized Strong Plasma Turbulence and Particle Acceleration

磁化强等离子体湍流和粒子加速

• 批准号: 9720263
• 负责人: James Weatherall
• 金额: $ 24.4万
• 依托单位: New Mexico Institute of Mining and Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-15 至 2001-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9720263&HistoricalAwards=false
• 关键词: Magnetized; Strong; Plasma; Turbulence; Particle

AST-9720263 ABSTRACT - J. Weatherall and J. Eilek MAGNETIZED STRONG PLASMA TURBULENCE AND PARTICLE ACCELERATION A new study of strong plasma turbulence combines theoretical and computational tools to address two important questions. One is the dynamics of magnetized strong turbulence. This study addresses the connection of large-scale Alfvenic turbulence to small-scale lower hybrid turbulence via the coupling of modes in strong turbulence processes. The second question is the role of turbulence in the energization of relativistic particles. This other study analyzes the dissipation of magnetized turbulence through transit-time damping. Such damping should be an effective accelerator of a high energy component of the plasma to relativistic energies. The research is particularly relevant to the area of particle acceleration in astrophysical plasmas, where the role of strong plasma turbulence has not been studied. The results of the research may lead to essential new physics for the energization of relativistic particles in clusters of galaxies. The program of research addresses basic issues of turbulent structure in magnetized plasmas, relativistic plasmas, and cosmic plasmas.

AST-9720263摘要- J. Weatherall和J. Eilek 增强等离子体强湍流与粒子加速 一项关于强等离子体湍流的新研究结合了理论和计算工具来解决两个重要问题。一个是磁化强湍流的动力学。本研究探讨大尺度Alfvenic湍流与小尺度低杂波湍流通过强湍流过程中模式耦合的联系。第二个问题是湍流在相对论性粒子运动中的作用。另一项研究分析了磁化湍流通过渡越时间阻尼的耗散。这样的阻尼应该是一个有效的加速器的高能量成分的等离子体相对论能量。 这项研究与天体物理等离子体中的粒子加速领域特别相关，在该领域，强等离子体湍流的作用尚未得到研究。研究结果可能会为星系团中相对论性粒子的发现带来新的物理学基础。 该研究计划涉及磁化等离子体，相对论等离子体和宇宙等离子体中湍流结构的基本问题。