Production, Evaporation, and Measurement of Submicron CsF Particles in a Shock Tube

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Abstract
Shock‐tube experiments have been carried out to determine the size of submicron CsF particles suspended in a carrier gas. The particles are produced in an oven by passing the carrier gas over a melt of CsF, causing the CsF to self‐nucleate. The rate of CsF ablation in the incident shock (1700<T<2700 °K) was measured directly by following the CsF gas production by an absorption measurement at 2095 Å. Calculations were carried out to determine the particle size for these observed ablation rates. The technique described provides a useful method for producing and introducing submicron particles into a shock tube and for measuring their evaporation rate and size.