Density profile control in a large diameter, helicon plasma

被引：34

作者：

Cluggish, BP ^{[1
]}

Anderegg, FA ^{[1
]}

Freeman, RL ^{[1
]}

Gilleland, J ^{[1
]}

Hilsabeck, TJ ^{[1
]}

Isler, RC ^{[1
]}

Lee, WD ^{[1
]}

Litvak, AA ^{[1
]}

Miller, RL ^{[1
]}

Ohkawa, T ^{[1
]}

Putvinski, S ^{[1
]}

Umstadter, KR ^{[1
]}

Winslow, DL ^{[1
]}

机构：

[1] Archimedes Technol Grp, San Diego, CA 92121 USA

来源：

PHYSICS OF PLASMAS | 2005年 / 12卷 / 05期

关键词：

D O I：

10.1063/1.1863212

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Plasmas with peaked radial density profiles have been generated in the world's largest helicon device, with plasma diameters of over 70 cm. The density profiles can be manipulated by controlling the phase of the current in each strap of two multistrap antenna arrays. Phase settings that excite long axial wavelengths create hollow density profiles, whereas settings that excite short axial wavelengths create peaked density profiles. This change in density profile is consistent with the cold-plasma dispersion relation for helicon modes, which predicts a strong increase in the effective skin depth of the rf fields as the wavelength decreases. Scaling of the density with magnetic field, gas pressure, and rf power is also presented. (c) 2005 American Institute of Physics.

引用

页数：7

共 22 条

[1] Theoretical components of the VASIMR plasma propulsion concept [J].