Helicon Plasma Discharge in a Toroidal Magnetic Field of the Tokamak

Author

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.

Author_Institution

Dept. of Phys., Soochow Univ., Soochow, China

Volume

39

Issue

11

fYear

2011

Firstpage

3103

Lastpage

3107

Abstract

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 10¹² 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.

Keywords

Tokamak devices; helicons; plasma density; plasma diagnostics; plasma toroidal confinement; plasma waves; spiral antennas; superconducting magnets; 4-turn flat spiral antennas; HWP discharge; advanced superconducting tokamak device; electron density; frequency 1.65 MHz; helicon wave plasma discharge; magnetic flux density 0.5 T; magnetic flux density 2 T; plasma uniformity; pressure 0.01 Pa; pressure 1 Pa; radiofrequency source; tokamak toroidal magnetic field; Antennas; Discharges; Magnetic resonance imaging; Plasmas; Radio frequency; Superconducting magnets; Toroidal magnetic fields; Experimental advanced superconducting tokamak (EAST); helicon; strong magnetic field;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2011.2161344

Filename

5985545