Experimental and analytical studies of plasma transport properties Semiannual progress report, 1 Dec. 1967 - 31 May 1968

Research progress in plasma transport properties, wave interaction, electron density measurements, thermal conductivity of argon and helium, heat transfer and pressure gage

Photodiagnostics of turbulent flows using laser-induced fluorescence

An optical probe technique that will allow remote measurements of temperature (and density), along with their time dependent fluctuations, to be made in a supersonic turbulent wind tunnel flow was developed. Laser-induced fluorescence from nitric oxide which was seeded into the flowing gas medium (nitrogen) at low concentrations was used. The fluorescence emission intensity following laser excitation of the nitric oxide (NO) ground state rotational levels is then related to thermodynamic quantities of the bulk fluid