Publication de 4 numéros par an
ISSN Imprimer: 1065-3090
ISSN En ligne: 1940-4336
Indexed in
PROBES OF SUPERCRITICAL CO2 BY DEFLECTION OF MULTIPLE BEAMLETS
RÉSUMÉ
We describe the creation of sets of 633-nm beamlets and their bending by supercritical СО2. Small temperature gradients within a cell that contains the fluid resulted in large density gradients that, in turn, are almost proportional to gradients of the optical refractive index. The paths of such beamlets can be described quantitatively. Beamlets were made with a He−Ne laser-beam that impinged on an array of apertures. The transmitted light forms Fraunhofer diffraction patterns whose shapes depend upon the arrangement of the apertures. The beamlets traversed a 7.62-cm-long cell and were deflected downward to a degree that depended upon the spatial distribution of CO2 density. The deflection is as much as 0.25 m at a distance of 2 m.