Experimental Investigation of Electromagnetic Ion- Temperature-Anisotropy Driven Instabilities

电磁离子温度各向异性驱动不稳定性的实验研究

• 批准号: 9616467
• 负责人: EARL SCIME
• 金额: $ 20.38万
• 依托单位: West Virginia University Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-12-15 至 2000-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9616467&HistoricalAwards=false
• 关键词: Experimental; Investigation; Electromagnetic; Ion; Temperature

The objective of the proposal is to produce, in a laboratory plasma device, unstable electromagnetic ion-temperature-anisotropy (EMITA) driven waves. According to the theory to be tested, a high B plasma and a substantial ion temperature anisotropy are required. The plasma will be generated with an inductively coupled "helicon" source that has been enhanced by the addition of ion cyclotron resonant heating. The additional perpendicular heating permits adjustment of the ion temperature anisotropy and raises the ion temperature to the electron temperature. An attempt to achieve a high B plasma will involve letting the plasma expand in to a low magnetic field chamber mated to the end of the helicon source. The chamber is large enough so that the ion gyroradius is smaller than the chamber diameter. The goal of the laboratory experiment is to provide enough information to benchmark the theoretically predicted behavior of the EMITA instability. This instability has been proposed as important in the magnetosheath and has been studied with AMPTEE/CCE measurements.

该提议的目标是在实验室等离子体设备中产生不稳定的电磁离子温度各向异性(Emita)驱动波。根据要测试的理论，需要高B等离子体和相当大的离子温度各向异性。等离子体将由一个电感耦合的“螺旋管”源产生，该源已通过增加离子回旋共振加热而得到增强。附加的垂直加热允许调整离子温度各向异性，并将离子温度提高到电子温度。实现高B等离子体的尝试将涉及到让等离子体膨胀到与螺旋源末端匹配的低磁场腔中。电离室足够大，以致离子回转半径小于电离室直径。实验室实验的目的是提供足够的信息，对埃米塔不稳定性的理论预测行为进行基准测试。这种不稳定性在磁鞘中被认为是重要的，并已用AMPTEE/CCE测量进行了研究。