Computer Studies of Wave Pheonomena in Space Plasma (Atmospheric Sciences)

空间等离子体波现象的计算机研究（大气科学）

• 批准号: 8902856
• 负责人: Mary Hudson
• 金额: $ 9.7万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8902856&HistoricalAwards=false
• 关键词: Computer; Studies; Wave; Pheonomena; Space

Dr. Hudson will undertake four research projects. The first involves simulations of active experiments in space. Particle simulations including beam density gradients are proposed, using an algorithm which extends a one dimensional electrostatic particle code to retain density gradient information. The second topic is whistler noise generation near the earth's plasmapause. A hybrid electromagnetic code, which includes magnetic field gradient effects, will be extended to include electron particle dynamics. The objective is to compare nonlinear and convective amplification of whistlers in the plasmapause region. The third topic is research into two hardware techniques for extending the size of simulation systems. The final research project simulates ion acoustic double layer evolution in an H+ - O+ plasma. These localized potential jumps, which are thought to contribute to auroral particle acceleration, are a basic feature of magnetized ion acoustic turbulence. Interactive activities will include teaching a senor seminar course in Simulations of Space Plasma Experiments and giving seminars on her research. Additionally, Dr. Hudson will organize a series of seminars on extraterestrial physics in which professional women scientists will participate. This project furthers VPW program objectives which are (1) to provide opportunities for women to advance their careers in engineering and in the disciplines of science supported by NSF and (2) to encourage women to pursue careers in science and engineering by providing greater visibility for women scientists and engineers employed in industry, government, and academic institutions. By encouraging the participation of women in science, it is a valuable investment in the Nation's future scientific vitality.

哈德森博士将承担四个研究项目。 第一个涉及太空中活跃实验的模拟。 提出了包括束密度梯度的粒子模拟，使用扩展一维静电粒子代码以保留密度梯度信息的算法。 第二个主题是地球等离子层顶附近哨声噪声的产生。 包括磁场梯度效应的混合电磁代码将扩展到包括电子粒子动力学。 目的是比较等离子层顶区域哨声的非线性和对流放大。 第三个主题是研究两种用于扩展仿真系统规模的硬件技术。 最终的研究项目模拟 H+ - O+ 等离子体中的离子声双层演化。 这些局部电位跳跃被认为有助于极光粒子加速，是磁化离子声湍流的基本特征。 互动活动将包括教授空间等离子体实验模拟高级研讨会课程以及举办有关她的研究的研讨会。 此外，哈德森博士还将组织一系列关于地外物理学的研讨会，职业女性科学家将参加这些研讨会。 该项目进一步推进了 VPW 计划的目标，即 (1) 为女性提供在 NSF 支持的工程和科学学科领域发展职业生涯的机会；(2) 通过为工业、政府和学术机构中雇用的女性科学家和工程师提供更大的知名度，鼓励女性从事科学和工程职业。 通过鼓励女性参与科学，这是对国家未来科学活力的宝贵投资。