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Velocity visualization in gas flows using laser-induced phosphorescence of biacetyl

1984; American Institute of Physics; Volume: 55; Issue: 12 Linguagem: Inglês

10.1063/1.1137687

1527-2400

Bernhard Hiller, R. A. Booman, C. Hassa, Ronald K. Hanson,

Cold Atom Physics and Bose-Einstein Condensates

Visualization of a two-dimensional velocity field by means of laser-induced phosphorescence is demonstrated in a nitrogen flow at room temperature. A pulsed dye laser is used to excite seeded biacetyl molecules along a line in the flow. Two successive exposures of the emitted phosphorescence are recorded with an intensified 100×100 element photodiode array camera. Velocities are determined from the distance traveled in the time interval between exposures. Important factors in connection with the phosphorescence of biacetyl are discussed.