Atomic Resonance Radiation Energetics Investigation as a Diagnostic Method forNon-Equilibrium Hypervelocity Flows

摘要

Absorption measurements with a tunable vacuum ultraviolet light source have beenproposed as a concentration diagnostic for atomic oxygen, and the viability of this technique is assessed in light of recent measurements. The instrumentation, as well as initial calibration measurements, have been reported previously. We report here additional calibration measurements performed to study the resonance broadening line shape for atomic oxygen. The application of this diagnostic is evaluated by considering the range of suitable test conditions and requirements, and by identifying issues that remain to be addressed.