The Temperature Field Visualization in the Pulse Tube Refrigerator Using Planar Laser Rayleigh Scatterring Method

概要

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For the pulse tube refrigerators, it is difficult to understand the refrigeration phenomena in experimental approach because the gas condition in pulse tube refrigerators is high pressure and low temperature which arc fluctuating. To measure the temperature under the above condition, we adopted Planar Laser Rayleigh Scattering Method (PLRS method) using excimer laser (wavelength 193nm). It is possible to measure the gas temperature field without contact with the gas. In order to evaluate the possibility using PLRS method, we took the following basic approach. We measured the Rayleigh scattering intensity in the metal tube with quartz glass windows for several static pressure (0.1, 0.2, 0.4, 0.7MPa). The linearity error between Rayleigh scattering intensity and pressure is 15.4% in a laser shot measurement, 1.3% in the average of 10 laser shots.
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