First Production of C$_{60}$ Nanoparticle Plasma Jet for Study of Disruption Mitigation for ITER*

Unique fast response and large mass-velocity delivery of nanoparticle plasma jets (NPPJs) provide a novel application for ITER disruption mitigation, runaway electrons diagnostics and deep fueling. NPPJs carry a much larger mass than usual gases. An electromagnetic plasma gun provides a very high injection velocity (many km/s). NPPJ has much higher ram pressure than any standard gas injection method and penetrates the tokamak confining magnetic field. Assimilation is enhanced due to the NP large surface-to-volume ratio. Radially expanding NPPJs help achieving toroidal uniformity of radiation power. FAR-TECH's NPPJ system was successfully tested: a coaxial plasma gun prototype ($\sim$35 cm length, 96 kJ energy) using a solid state TiH$_{2}$/C$_{60}$ pulsed power cartridge injector produced a hyper-velocity ($>$4 km/s), high-density ($>$10$^{23}$~m$^{-3})$, C$_{60}$ plasma jet in $\sim$0.5 ms, with $\sim$1$-$2 ms overall response-delivery time. We present the TiH$_{2}$/C$_{60}$ cartridge injector output characterization ($\sim$180 mg of sublimated C$_{60}$ gas) and first production results of a high momentum C$_{60}$ plasma jet ($\sim$0.6 g$\cdot$km/s).