可操纵等离子体微波镜

I. Alexeff, T. Anderson
{"title":"可操纵等离子体微波镜","authors":"I. Alexeff, T. Anderson","doi":"10.1109/PLASMA.2009.5227631","DOIUrl":null,"url":null,"abstract":"We have developed a steerable plasma microwave mirror based on our previous work on the reflection of microwaves on a plasma slab. We have discovered that for plasma densities above microwave cutoff, the phase of the reflection varies continuously from a voltage antinode at the plasma surface when the plasma density just reaches microwave cutoff, to a voltage node at the plasma surface when the plasma density is much larger than that required for microwave cutoff. An analogy to the reflection at the end of a coaxial cable is that the first case corresponds to an open line (displacement and conduction currents equal and opposite), and the second case corresponds to a shorted line (conduction current much greater than displacement current). The operating plasma mirror as presently designed comprises a surface of plasma tubes. By programming the plasma density in the various tubes, the reflected microwaves experience a varying phase shift from tube to tube and the reflected beam is steered in analogy to the way an emitted microwave beam is steered by a phased transmission antenna array. The time required for reconfiguring the beam direction corresponds to the time required for plasma modification-in this case, a few milliseconds.","PeriodicalId":6359,"journal":{"name":"2008 IEEE 35th International Conference on Plasma Science","volume":"33 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A steerable plasma microwave mirror\",\"authors\":\"I. Alexeff, T. Anderson\",\"doi\":\"10.1109/PLASMA.2009.5227631\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We have developed a steerable plasma microwave mirror based on our previous work on the reflection of microwaves on a plasma slab. We have discovered that for plasma densities above microwave cutoff, the phase of the reflection varies continuously from a voltage antinode at the plasma surface when the plasma density just reaches microwave cutoff, to a voltage node at the plasma surface when the plasma density is much larger than that required for microwave cutoff. An analogy to the reflection at the end of a coaxial cable is that the first case corresponds to an open line (displacement and conduction currents equal and opposite), and the second case corresponds to a shorted line (conduction current much greater than displacement current). The operating plasma mirror as presently designed comprises a surface of plasma tubes. By programming the plasma density in the various tubes, the reflected microwaves experience a varying phase shift from tube to tube and the reflected beam is steered in analogy to the way an emitted microwave beam is steered by a phased transmission antenna array. The time required for reconfiguring the beam direction corresponds to the time required for plasma modification-in this case, a few milliseconds.\",\"PeriodicalId\":6359,\"journal\":{\"name\":\"2008 IEEE 35th International Conference on Plasma Science\",\"volume\":\"33 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2009-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2008 IEEE 35th International Conference on Plasma Science\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/PLASMA.2009.5227631\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2008 IEEE 35th International Conference on Plasma Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PLASMA.2009.5227631","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

摘要

我们在研究微波在等离子体板上反射的基础上,研制了一种可操纵的等离子体微波反射镜。我们发现,对于微波截止点以上的等离子体密度,反射相位连续变化,从等离子体密度刚刚达到微波截止点时等离子体表面的电压反极,到等离子体密度远远大于微波截止点时等离子体表面的电压节点。与同轴电缆末端反射的类比是,第一种情况对应于一条开路(位移电流和传导电流相等且相反),第二种情况对应于一条短路(传导电流远大于位移电流)。目前设计的工作等离子体反射镜包括等离子体管表面。通过对不同管中的等离子体密度进行编程,反射的微波在管与管之间经历不同的相移,反射的光束被引导,类似于发射的微波光束被相控传输天线阵列引导的方式。重新配置光束方向所需的时间与等离子体修饰所需的时间相对应——在这种情况下,需要几毫秒。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A steerable plasma microwave mirror
We have developed a steerable plasma microwave mirror based on our previous work on the reflection of microwaves on a plasma slab. We have discovered that for plasma densities above microwave cutoff, the phase of the reflection varies continuously from a voltage antinode at the plasma surface when the plasma density just reaches microwave cutoff, to a voltage node at the plasma surface when the plasma density is much larger than that required for microwave cutoff. An analogy to the reflection at the end of a coaxial cable is that the first case corresponds to an open line (displacement and conduction currents equal and opposite), and the second case corresponds to a shorted line (conduction current much greater than displacement current). The operating plasma mirror as presently designed comprises a surface of plasma tubes. By programming the plasma density in the various tubes, the reflected microwaves experience a varying phase shift from tube to tube and the reflected beam is steered in analogy to the way an emitted microwave beam is steered by a phased transmission antenna array. The time required for reconfiguring the beam direction corresponds to the time required for plasma modification-in this case, a few milliseconds.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信