Plasma Polarization Spectroscopy on Cusp Plasma and GAMMA 10 Tandem Mirror Plasma

This paper reports the results of the polarization measurements of emission lines from the plasma. The emission lines from helium atoms are polarized in a plasma produced with 2.45 GHz electron cyclotron resonance microwave at the plug-barrier region during EC discharge cleaning. The polarization direction is parallel to the magnetic field. This polarization direction indicates that the electron velocity distribution function is prolate or of a cigar-like shape. The emissions from OII and CIII ions in an ICH plasma at the central region are observed with the polarization separation optics.