Diagnostic Progress and Results on the Magnetized Shock Experiment

The Magnetized Shock Experiment (MSX) at LANL is reliably producing Field Reversed Configuration (FRC) plasmas spanning peak densities of $\sim$ 10$^{21-23}$ m$^{-3}$, combined Te$+$Ti of 10s-500eV and velocities of 100-300km/s as a means to producing a laboratory supercritical collision-less shock. Visible light images showing discontinuities indicative of shocks and jetting have been obtained on various targets: co-solenoid B field, a metal wall and counter-solenoidal B fields (FRC capture and reconnection). Two chord interferometry, external and internal magnetic probing are routinely employed and x-ray diagnostic capability has recently been added. The pulsed polarimetry technique is being deployed which can measure the local magnetic field using Lidar Thomson scattering. In addition, a fiber optic version of pulsed polarimetry using a new specialty fiber that enhances fiber backscatter with Fiber Bragg Gratings is being developed. Magnetic fields of order $\sim$ 1T have been measured, however a new modified shock chamber geometry and recent machine modifications enabling operation at increased $\theta $-coil voltage are expected to improve translation speed and hence stagnation pressures. Progress on these diagnostics and results will be presented.