Abstract
Electrothermal chemical (ETC) or plasma ignition of propellants has been investigated by observing the interactions of individual and combinations of the individual components of an ETC pulse with a thin film of propellant. Adjusting the applied dc bias of high-density hydrogen and argon plasmas, ions or electrons may be drawn to the film surface with defined energies and resulting in erosion of the film. Strong synergistic effects are observed between reactive hydrogen atoms and ion bombardment, and a physical model of the process is presented. These synergistic effects may be directly related to the short, highly reproducible ignition delay that characterizes the ETC ignition technology.
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