Modeling Electron Power Flow in Magnetically Insulated Transmission lines at 10 MV

Summary form only given. Designs of pulsed-power driven high-intensity electron beam accelerators continue to strive for higher power for brighter radiographic sources. Power delivery from the voltage drive source to the load is commonly via a magnetically insulated transmission line (MITL) in which a portion of the power flows as free electrons emitted from the cathode. Increasing the drive power creates challenges for modeling particle emission and power flow in MITLs beyond the tvpical field stress emission. In this presentation, we compare results from standard particle emission models in the particle-in-cell code LSP to data from Sandia National Laboratories´ Radiographic Integrated Test Stand (RITS-6), a six-stage inductive voltage adder (IVA) designed to produce currents of 120 kA at voltages in excess of 10 MV in 70 ns. The transmission line is modeled for both a blade-load termination and a self-magnetic-pinch diode (SMP). Comparisons between simulation, data, and power-flow theory are shown, and additional plasma emission models are discussed.