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research article
Towards an optimal antenna for helicon waves excitation
Helicon sources are known to produce high-density plasmas and have found many applications. Different types of antenna have been used for helicon excitation but none of them generate a radio-frequency (rf) field that matches the helicon wave field determined by the dispersion equation. We show that this match can be obtained to a very good approximation by using a birdcage type antenna. Our plasma experiments show that a helicon regime with electron densities up to 5x10(12) cm(-3) is obtained for very low rf power injection (typically 200 W), and at an unusual operating pressure up to 25 Pa.
Type
research article
Web of Science ID
WOS:000232937500005
Authors
Publication date
2005
Published in
Volume
98
Issue
8
Article Number
083304
Peer reviewed
REVIEWED
Available on Infoscience
April 16, 2008
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