Holographic Investigation of Electrostatic Spraying.

摘要

Holography was used to investigate the microscopic phenomena in the vicinity of the tip of a metal capillary that was electrostatically spraying a conducting liquid. The capillary was 0.014inch in diameter and the voltage of the capillary relative to its surroundings was varied from 5to 7kv. The liquid sprayed was sodium iodide doped glycerol. Holograms were made with a pulsed ruby laser and reconstructed with a helium-neon laser. The spray was found to originate on the surface of the liquid as well as around the rim of the capillary. Calculations of electric field strength on the axis of the needle indicated that the field of the liquid surface was probably high enough to induce spraying. (Modified author abstract)