Vacuum arc plasma transport through a magnetic duct with a biased electrode at the outer wall
- Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon (Hong Kong)
- Department of Engineering, University of Cambridge, Cambridge CB2 1PZ (United Kingdom)
- Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)
Metal plasma formed by a vacuum arc plasma source can be passed through a toroidal-section magnetic duct for the filtering of macroparticles from the plasma stream. In order to maximize the plasma transport efficiency of the filter the duct wall should be biased, typically to a positive voltage of about 10{endash}20 V. In some cases it is not convenient to bias the duct, for example if the duct wall is part of the grounded vacuum system. However, a positively biased electrode inserted into the duct along its outer major circumference can serve a similar purpose. In this article, we describe our results confirming and quantifying this effect. We also show the parametric dependence of the duct transport on the experimental variables. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 357350
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 8 Vol. 70; ISSN 0034-6748; ISSN RSINAK
- Country of Publication:
- United States
- Language:
- English
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