Reproducible High Density Field-Reversed Configuration Plasma for Magnetized Target Fusion

Field-Reversed Configuration (FRC) plasma will be translated into an imploding metal liner in a Magnetized Target Fusion (MTF) scenario. Field-Reversed Theta Pinch technology is employed with programmed cusp fields at the theta coil ends to achieve non-tearing field line reconnection during FRC formation. In the Field Reversed Configuration Experiment with a Liner (FRX-L), an optimum formation procedure is identified. The well-formed FRC plasma has volume-averaged density of 2 - 4$\times $10$^{22}$m$^{-3}$, T$_{e}$+T$_{i}$ of 300-500 eV, and plasma lifetime between 15-20 $\mu $s. These parameters are very close to the desired parameters of a target plasma for MTF, and they can be reproduced with standard deviation of less than 10{\%} about the mean in consecutive discharges. Recently, the redesigned crowbar switches have reduced the external main field modulation from 52{\%} previously to 21{\%} now. Better FRC performance is expected in on-going experimental campaigns.