Resolved rotation–vibration non-equilibrium with rotational VIPA-CARS
Scott A. Steinmetz, Timothy Y. Chen, Benjamin M. Goldberg, Christopher Limbach, Christopher J. Kliewer
Abstract
plasma with rotational coherent anti-Stokes Raman scattering (CARS) resolved with a virtually imaged phased array (VIPA)-based spectrometer. A VIPA spectrally separates rotational transitions for each vibrational state, allowing vibrational populations to be directly measured. VIPA-CARS is shown to provide more accurate measurements of non-equilibrium temperatures than grating-resolved rotational CARS. The general characteristics, limitations, and potential uses of VIPA-CARS are discussed.
Topics & Concepts
OpticsRotation (mathematics)Raman scatteringGratingRotational–vibrational spectroscopyRotational transitionSpectrometerRaman spectroscopyPhysicsMaterials scienceAtomic physicsAngular momentumClassical mechanicsExcited stateGeometryMathematicsSpectroscopy and Laser ApplicationsCombustion and flame dynamicsLaser-induced spectroscopy and plasma