Session *BB1.1

8:30 AM *BB1.1
ADVANCED DIAGNOSTIC TECHNIQUES FOR THERMAL PLASMAS AND THERMAL PLASMA SPRAY PROCESSING. J. R. Fincke, W. D. Swank, D. C. Haggard, and S. C. Snyder, Optical and Plasma Physics, Idaho National Engineering Laboratory, Idaho Falls, ID.

Recent developments in the diagnostics of thermal plasma flow fields and injected particles in the thermal plasma spray process are reviewed. The plasma diagnostic techniques discussed are Rayleigh and coherent Thomson scattering, laser schlieren, laser induced fluorescence, coherent anti-Stokes Raman Spectroscopy, and enthalpy probes. The quantities measured are heavy pspecies and electron temperature, ionized fraction, plasma composition, and plasma velocity. Injected particle size, velocity, temperature, and number density are simulatneously measured by phase Doppler laser velocimetry, and high speed two-color optical pyrometry. Measured particle parameters are contrasted with plasma flow field characteristics and the plasma-particle interactions discussed.