Open field line region electron temperature and density profiles in C-2W via Thomson scattering

C-2W is a recently constructed field-reversed configuration (FRC) plasma experiment which aims to increase plasma lifetimes and ramp-up electron temperatures with respect to its predecessor C-2U. A mirror-confined scrape-off-layer (SOL) encloses the central FRC and collapses into axial plasma jets along open field lines on either side of the central vessel. These connect to biasable electrode plates in the inner and outer divertors allowing for a range of magnetic field configurations and plasma edge conditions to be explored. A new jet Thomson scattering (TS) diagnostic capable of acquiring 4 temporal measurements at a repetition rate of 100 Hz across 5 radial locations of C-2W’s south jet region is under construction. Measuring the properties of the plasma jet is important for studying the FRC translation, confinement and sustainment, and for determining the conditions and parameters needed for increasing the FRC lifetimes and electron temperatures. System design, status, and results are reported and discussed.