Fluctuation in a helicon plasma with additional immersed antenna

Author

Aanesland, Ane ; Charles, Christine ; Boswell, Rod ; Fredriksen, Åshild

Author_Institution

Res. Sch. of Phys. Sci. & Eng., Australian Nat. Univ., Canberra, ACT, Australia

Volume

33

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

360

Lastpage

361

Abstract

Fluctuations in the floating potential are measured in a cylindrical magnetised plasma, as the phase between a "primary" Helicon antenna and a "secondary" immersed antenna is varied. The two antennas are powered by separate radio frequency (RF) generators of 13.56 MHz controlled by a single oscillator and phase shifter. The Helicon antenna is separated from the plasma by a glass tube, while the immersed copper antenna is in direct contact with the plasma. The image presented here shows floating potential fluctuations of ∼100 Hz where the amplitude of the fluctuations vary dramatically with the phase between the two RF generators.

Keywords

Langmuir probes; antennas in plasma; helicons; plasma fluctuations; 13.56 MHz; cylindrical magnetised plasma; floating potential fluctuation; helicon plasma; immersed copper antenna; oscillator; phase shifter; primary helicon antenna; radio frequency generators; secondary immersed antenna; Antenna measurements; Fluctuations; Magnetic separation; Oscillators; Phase measurement; Phase shifters; Plasma measurements; Power generation; Radio control; Radio frequency; Dual antenna generated plasmas; fluctuations; radio frequency plasma;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2005.845133

Filename

1420476