Abstract
Relaxation of a stationarily flowing jet-like plasma, which penetrates into a neutral gas with temperature and kinetic energy much lower than the ionization potential, is investigated experimentally by measuring spatial distributions of hydrodynamic quantities such as plasma flow velocity, electron temperature and density in the plasma-neutral gas interaction zone. The experimental results agree with calculations. The particle, momentum and energy conservations of the plasma in the interaction zone are dominated by diffusion, ion elastic collision with neutral atoms and ionization, respectively.
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