Physics of non-neutral plasmas confined on magnetic surfaces

限制在磁性表面上的非中性等离子体的物理学

• 批准号: 0613662
• 负责人: Thomas Pedersen
• 金额: --
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-15 至 2010-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0613662&HistoricalAwards=false
• 关键词: Physics; non; neutral; plasmas; confined

The confinement of non-neutral plasmas by magnetic surfaces, such as those of a tokamak or a stellarator, is a new area of plasma research. The theory of such plasmas, which range from single component to quasi-neutral, has had a rapid development during the first three years of this project. A goal of the research is to use the strong electric fields of an electron rich plasma in a stellarator to confine the first laboratory electron-positron plasmas. The primary focus of the theory program has been on pure electron plasmas, in particular the properties of low density electron plasma equilibria. During the present award period, the theory of pure electron plasmas will be extended to partly neutralized plasmas. These plasmas have properties that are unlike either pure electron or quasi-neutral plasmas. Qualitatively new physics remains to be discovered. The theory program is closely associated with the Columbia Non-neutral Torus (CNT) experiment; theoretical results have already had a major impact on the design and the interpretation of CNT experiments. The interaction between CNT and theory is intensifying as both programs mature. These theories are also now being tested on two devices in Japan.In addition to graduate student participation, the program already involves substantial participation by undergraduate students as well as high school students, and will continue to do so in the future. Women students and students from historically underrepresented minorities have participated in this research, and the investigators will continue to actively recruit among groups underrepresented in science.

通过磁性表面（例如托卡马克或仿星器的磁性表面）限制非中性等离子体是等离子体研究的一个新领域。此类等离子体的理论范围从单一成分到准中性，在该项目的前三年中得到了快速发展。该研究的一个目标是利用仿星器中富电子等离子体的强电场来限制第一个实验室电子-正电子等离子体。该理论计划的主要焦点是纯电子等离子体，特别是低密度电子等离子体平衡的特性。在目前的奖励期内，纯电子等离子体的理论将扩展到部分中和的等离子体。这些等离子体具有不同于纯电子或准中性等离子体的特性。新的物理学仍有待发现。该理论程序与哥伦比亚非中性环面（CNT）实验密切相关；理论结果已经对碳纳米管实验的设计和解释产生了重大影响。随着两个项目的成熟，CNT 和理论之间的相互作用正在加强。 这些理论目前也在日本的两台设备上进行测试。除了研究生的参与外，该计划已经吸引了本科生和高中生的大量参与，并将在未来继续这样做。女学生和历史上代表性不足的少数族裔的学生参与了这项研究，研究人员将继续积极招募科学领域代表性不足的群体。