Diagnostics and camera strobe timers for hydrogen pellet injectors

Summary form only given. A synchronization system for high-speed photography using pulsed light sources, standard video cameras, and video recorders is discussed. This system enabled near-real-time visualization of the pellet shape, size, and flight trajectory over a wide range of pellet speeds and at one or two positions along the flight path. The system provides synchronization pulses to the data system for pseudo-points along the flight path, such as the estimated plasma edge. This was accomplished using an electronic system that took the time measured between sets of light gates and generated proportionally delayed triggers for light source strobes and pseudo-points.