Plasma production by helicon waves with single mode number in low magnetic fields

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dc.creatorSato, Genta
dc.creatorOohara, Wataru
dc.creatorHatakeyama, Rikizo
dc.date2004-10-20
dc.date.accessioned2026-07-07T05:53:02Z
dc.date.available2026-07-07T05:53:02Z
dc.descriptionRadio-frequency discharges are performed in low magnetic fields (0-10 mT) using three types of helicon-wave exciting antennas with the azimuthal mode number of $|m|$ = 1. The most pronounced peak of plasma density is generated in the case of phased helical antenna at only a few mT, where the helicon wave with $|m| = 1$ is purely excited and propagates. An analysis based on the dispersion relation well explains the density-peak phenomenon in terms of the correspondence between the antenna one-wavelength and the helicon wavelength. The $m=+1$ helicon wave propagates even in high magnetic fields where the density peaks are not observed, but the $m=-1$ helicon wave disappers. It is expected theoretically that the $m=-1$ helicon wave shows cutoff behavior in a low density region, [M. Kramer, Phys. Plasmas 6, 1052 (1999)], and the cutoff of $m=-1$ helicon wave experimentally observed coincides with the calculated one.
dc.description12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France)
dc.identifierhttps://arxiv.org/abs/physics/0410164
dc.identifierhttp://arxiv.org/abs/physics/0410164
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/86513
dc.subjectPlasma Physics
dc.titlePlasma production by helicon waves with single mode number in low magnetic fields
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