Laser Doppler velocimetry of particles in a plasma torch.
A low-cost method of measuring the velocity of particles injected into a plasma torch is described based on direct detection of the Doppler-shifted frequency of laser light scattered by the particles. Velocities ranging from 5 to 60 m/s have been measured for alumina powders using this technique.
Mannik
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Ontario Hydro Research Division, 800 Kipling Avenue, Toronto, Ontario M8Z 5S4.
Brown
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SK