Accession Number : ADA194116

Title :   Beam Combining by Phase Transition Nonlinear Media.

Descriptive Note : Semi-annual interim rept. no. 1, 1 Jun 87-31 Jan 88,

Corporate Author : ROCKWELL INTERNATIONAL CANOGA PARK CA ROCKETDYNE DIV

Personal Author(s) : Wang, Victor ; Roullard, Pete

PDF Url : ADA194116

Report Date : 04 Mar 1988

Pagination or Media Count : 26

Abstract : Rocketdyne a division of Rockwell International, is conducting this research program to study, develop, and demonstrate the use of a gas or liquid near a phase transition as an efficient phase conjugation material. We expect to observe enhanced efficiencies of Degenerate Four Wave Mixing (DFWM) and Stimulated Brillouin Scattering (SBS) in liquids undergoing cavitation (also referred to as incipient or nucleate boiling or as superheated) or in gases undergoing supersaturated (supercooled) condensation. We will achieve these nonequilibrium conditions via the sudden pressure drop obtained by flowing the fluid through a nozzle. Since the change of state from liquid to gas can be made to occur more readily near the fluid's critical point as compared with other conditions, we are choosing to work with fluids whose critical points are near room temperature, thus simplifying problems of thermal control.

Descriptors :   *CAVITATION, *CONDENSATION, *NUCLEATE BOILING, *PHASE TRANSFORMATIONS, *LIGHT SCATTERING, EFFICIENCY, FLUIDS, GASES, LIQUEFIED GASES, MATERIALS, MIXING, NONEQUILIBRIUM FLOW, NONLINEAR SYSTEMS, PRESSURE, REDUCTION, ROOM TEMPERATURE, TEMPERATURE CONTROL, WAVES, BRILLOUIN ZONES, SUPERSATURATION, SUPERCOOLING

Subject Categories : Optical Detection and Detectors
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE