Session 7P - Plasma Applications and Plasma Technology.
POSTER session, Thursday morning, November 14
Exhibit Hall - Concourse Level, Adam's Mark
We have previously theorized \footnote F.F. Chen, Bull. Amer. Phys. Soc. 35, 2101 (1990). that plane-polarized helicon waves can be formed by the addition of right- and left-hand circular modes in the proper ratio. Using Langmuir probes and time-integrated photographs of the light distribution in a 4-in diam helicon discharge in argon, we have seen asymmetric light patterns with a straight Nagoya Type III antenna and more symmetric patterns with a helical antenna. The patterns change with magnetic field. We shall attempt to connect the observations with theory.