Helicon Plasma Discharge in a Toroidal Magnetic Field of the Tokamak

A helicon wave plasma (HWP) discharge in an experimental advanced superconducting tokamak device with a toroidal magnetic field of 2 T is investigated. The HWP with an electron density of 10 12 cm -3 was produced with two 4-turn flat spiral antennas in series that are perpendicular to the toroidal m...

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Veröffentlicht in:	IEEE transactions on plasma science 2011-11, Vol.39 (11), p.3103-3107
Hauptverfasser:	Jin, C. G., Yu, T., Zhao, Y., Bo, Y., Ye, C., Hu, J. S., Zhuge, L. J., Ge, S. B., Wu, X. M., Ji, H. T., Li, J. G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Antennas Charge coupled devices Discharge Discharges Electrons Experimental advanced superconducting tokamak (EAST) helicon Helium Magnetic fields Magnetic resonance imaging Plasmas Power supply Radio frequencies Radio frequency strong magnetic field Superconducting magnets Superconductivity Tokamak devices Toroidal magnetic fields
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Zusammenfassung:	A helicon wave plasma (HWP) discharge in an experimental advanced superconducting tokamak device with a toroidal magnetic field of 2 T is investigated. The HWP with an electron density of 10 12 cm -3 was produced with two 4-turn flat spiral antennas in series that are perpendicular to the toroidal magnetic field and driven by a 13.56-MHz radio-frequency (RF) source at a power of 1500 W, a toroidal magnetic field of 2 T, and a pressure (helium) of 1 Pa. The increase of the toroidal magnetic field from 0.5 to 2 T, the increase of the RF power from 500 to 1500 W, and the decrease of the pressure (helium) from 1 to 0.01 Pa were found to improve the plasma uniformity from the CCD images.
ISSN:	0093-3813 1939-9375
DOI:	10.1109/TPS.2011.2161344