Fluctuation in a Helicon Plasma with Additional Immersed Antenna
Date
2005
Authors
Aanesland, Ane
Charles, Christine
Boswell, Roderick
Frederiksen, Ashild
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE Inc)
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.
Description
Keywords
Keywords: Antenna feeders; Antennas; Helicons; Oscillators (electronic); Phase shifters; Probes; Dual antenna generated plasmas; Fluctuations; Helicon antenna; Immersed antenna; Radio frequency plasma; Plasmas Dual antenna generated plasmas; Fluctuations; Radio frequency plasma
Citation
Collections
Source
IEEE Transactions on Plasma Science
Type
Journal article