Control of Plasma Instabilities

所有的等离子体都受到各种不稳定性的影响，无论 生产这些器械的器械类型及其预期用途 应用. 这些包括用于中性、电子和 离子束，任何类型的电弧放电，固体等离子体蚀刻设备 状态处理，基本实验装置，地球物理和 天体物理等离子体和聚变机器 的有害 不稳定性的后果有很多： 等离子体，增加运输，如果足够猛烈， 分手吧 这些可能会导致最低限度的性能下降 设备或系统的故障，有时甚至导致其故障。 因此 总是希望消除这些不稳定性 有时是必要的。 该项目继续研究积极的 等离子体不稳定性的反馈控制。 特别是一个新的遥控器 将使用使用小离子束的抑制器，其将具有 对系统的扰动最小。 鲁棒控制器也将 研究了 这些控制器在工业等离子体中的应用 设备将被探索。 两名教员和一名毕业生 学生将使用以下设施进行拟议的研究： 哥伦比亚大学等离子体研究实验室。 实验 工作将利用重新设计的哥伦比亚线性机。

All plasmas are subject to a variety of instabilities, irrespective of the type of devices in which these are produced and their intended applications. These include plasma sources for neutral, electron and ion beams, any type of arc discharge, plasma etching devices for solid state processing, basic experimental devices, geophysical and astrophysical plasma and fusion machines. The deleterious consequences of the instabilities are many: non-uniformities in plasma, increased transport and, if violent enough, a macroscopic break up. These can lead minimally to degradation of the performance of the device or system and sometimes to its break down. Therefore the elimination of these instabilities is always desirable and sometimes imperative. This project continues research into active feedback control of plasma instabilities. Specifically, a new remote suppressor using a small ion beam will be used, which will have minimal perturbation to the system. Robust controllers will also be studied. Applications of these controllers to industrial plasma devices will be explored. Two faculty members and one graduate student will carry out the proposed research using the facilities of the Columbia University Plasma Research Laboratory. The experimental work will utilize the redesigned Columbia Linear Machine.