Control of Plasma Instabilities and Transport

等离子体不稳定性和传输的控制

基本信息

批准号：
8616322
负责人：
Amiya Sen
金额：
$ 30.7万
依托单位：
Columbia University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1987
资助国家：
美国
起止时间：
1987-06-01 至 1990-11-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8616322&HistoricalAwards=false
关键词：
Control Plasma Instabilities Transport

项目摘要

This research is in the control of plasma instabilities and the study of instability driven anomalous transport. Specifically, the multimode feedback stabilization of plasma instabilities utilizing a new concept of 'normal mode states' will be studied. A state feedback scheme in conjunction with either a state reconstructor or a Kalman filter will be devised. A remote suppressor appropriate for high temperature plasma will also be developed. Furthermore, instability driven anomalous diffusion will be experimentally studied including its relationship with instability parameters. The experimental work will utilize the redesigned Columbia Linear Machine. This research effort is in the feedback control of plasma instabilities and on the anomalous plasma transport induced by them. Instabilities afflict all plasmas irrespective of the type of devices they are part of and their intended applications. These include basic experimental devices, plasma sources for neutral, electron and ion beams, plasma etching devices for solid state fabrication and fusion machines. The instabilities cause non-uniformities in plasma, increased transport and, if violent enough, can cause macroscopic break up. The elimination of these instabilities is sometimes necessary, but their suppression is always desirable for better performance. As redesigning increasingly better equilibria has often failed to eliminate these instabilities completely, feedback control appears to be a very attractive but neglected area of researach.

这项研究是为了控制血浆不稳定性和对不稳定性驱动异常运输的研究。具体而言，将研究使用新的“正常模式状态”概念的等离子体不稳定性的多模模反馈稳定。将设计与状态重建器或Kalman过滤器结合使用的状态反馈方案。还将开发适合高温等离子体的远程抑制器。此外，将对不稳定性驱动的异常扩散进行实验研究，包括其与不稳定性参数的关系。实验工作将利用重新设计的哥伦比亚线性机器。这项研究工作在于对等离子体不稳定性的反馈控制以及它们引起的异常血浆转运。不管它们是其中一部分的设备及其预期应用的设备类型，不管是所有等离子体的问题。这些包括基本的实验设备，用于中性，电子和离子束的血浆源，用于固态制造和融合机的等离子体蚀刻设备。不稳定性会导致血浆中的不均匀性，增加运输，如果足够暴力，可能会导致宏观分解。消除这些不稳定性有时是必要的，但是它们的抑制始终是可取的，以提高性能。由于重新设计越来越好的平衡通常无法完全消除这些不稳定性，因此反馈控制似乎是一个非常有吸引力但被忽视的researach领域。