A plasma window for transmission of particle beams and radiation from vacuum to atmosphere for various applications
A plasma window for transmission of particle beams and radiation from vacuum to atmosphere for various applications
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DOI：
10.1063/1.872885
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发表时间：
1998-04
影响因子：
2.2
通讯作者：
A. Hershcovitch
中科院分区：
文献类型：
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作者：
A. Hershcovitch
许多工业和科学过程，如离子材料改性、电子束熔化和焊接，以及同步辐射的产生，现在都只在真空中进行，因为电子枪、离子枪、它们的提取器和加速器必须保持在相当高的真空中。因此，存在许多限制，其中包括由于所需的泵送时间而导致的低生产率、对目标物体尺寸的限制、以及通过箔或差分泵送部分的粒子束和辐射的劣化。一种新的装置，它利用短等离子弧，成功地用于提供真空-大气界面作为差分抽气的替代方案。成功地实现了带电粒子束从真空通过等离子体到大气的传输。包括在这篇文章中的理论框架，实验结果，以及这种新的接口可能的应用。
Many industrial and scientific processes like ion material modification, electron beam melting, and welding, as well as generation of synchrotron radiation are performed exclusively in vacuum nowadays, since electron guns, ion guns, their extractors, and accelerators must be kept at a reasonably high vacuum. Consequently, there are numerous limitations, among which are low production rates due to required pumping time, limits on the size of target objects, and degradation of particle beams and radiation through foils or differentially pumped sections. A novel apparatus, which utilized a short plasma arc, was successfully used to provide a vacuum-atmosphere interface as an alternative to differential pumping. Successful transmission of charged particle beams from a vacuum through the plasma to atmosphere was accomplished. Included in the article are a theoretical framework, experimental results, and possible applications for this novel interface.