Fast gas heating and kinetics of electronically excited states in a nanosecond capillary discharge in CO₂

Abstract Fast gas heating in a pulsed nanosecond capillary discharge pure CO 2 under the conditions of high specific deposited energy (around 1.2 eV/molecule) and reduced electric fields (150–250 Td) has been studied experimentally numerically. Specific energy, field temperature have measured as functions time. The radial distribution electron density analyzed experimentally. role quenching O( 1 D), S) CO(a 3 ?) excited atoms molecules leading to heat release at sub-microsecond time scale by numerical modeling framework 1D axial approximation.