Abstract—
A technique for visualizing supersonic underexpanded gas jets flowing from sonic or supersonic nozzles into a rarefied space with a pressure of 0.2−100 Pa has been developed. The technique is based on exciting the luminescence of a gas jet moving according to the prescribed law relative to a focused electron beam with a diameter less than 1 mm. The luminescence of the excited gas was read by a scanner and transformed into an image. The density of the gas jet was quantified by the image brightness using the developed software.
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ACKNOWLEDGMENTS
This study was performed using the equipment of the Applied Physics Center of Collective Use of Devices and Equipment of the NSU.
Funding
This work was supported by the Ministry of Education and Science of the Russian Federation, grant nos. 3.5918.2017/ITR and 3.5920.2017/ITR.
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Translated by N. Goryacheva
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Yaskin, A.S., Kalyada, V.V., Zarvin, A.E. et al. A High-Efficiency Method for Scanning Supersonic Jets of Rarefied Gases. Instrum Exp Tech 63, 430–434 (2020). https://doi.org/10.1134/S0020441220030185
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DOI: https://doi.org/10.1134/S0020441220030185