Control of Plasma Instabilities

等离子体不稳定性的控制

• 批准号: 9004238
• 负责人: Amiya Sen
• 金额: $ 25.8万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004238&HistoricalAwards=false
• 关键词: Control; Plasma; Instabilities

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.

所有等离子体都遵守各种不稳定性，而不论其生产的设备及其预期应用的类型如何。 其中包括用于中性，电子和离子束的等离子体源，任何类型的电弧放电，用于固态加工的等离子体蚀刻装置，基本的实验设备，地球物理和天体物理等离子体和融合机。 不稳定性的有害后果是许多：血浆中的不均匀性，增加运输，如果足够猛烈，则宏观分裂。 这些可以最小化设备或系统性能的降解，有时会破坏。 因此，消除这些不稳定性总是可取的，有时是当务之急。 该项目继续研究血浆不稳定性的积极反馈控制。 具体而言，将使用使用小离子束的新远程抑制器，该抑制器将对系统的扰动最少。 还将研究强大的控制器。 这些控制器将在工业等离子体设备上的应用。 两名教职员工和一名研究生将使用哥伦比亚大学等离子体研究实验室的设施进行拟议的研究。 实验工作将利用重新设计的哥伦比亚线性机器。