APPLICATION OF THE SHACK-HARTMANN WAVEFRONT SENSOR FOR MONITORING THE PARAMETERS OF A SUPERSONIC GAS JET
V. I. Trunov1, K. V. Gubin1, K. A. Ivanova1, A. G. Poleshchuk2, A. G. Sedukhin2, V. V. Cherkashin2
1Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, pr. Akadmika Lavrent'eva 13/3, Novosibirsk, 630090 Russia
2Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 1, Novosibirsk, 630090 Russia
Keywords: газовая струя, сопло Лаваля, датчик Шэка-Гартмана, анализ волнового фронта, gas jet, Laval nozzle, Shack-Hartmann sensor, wavefront analysis
Abstract
Results of an experimental study of the density distribution in a small-size (1-2 mm in diameter) supersonic gas jet in vacuum are reported. The measurements are performed by the developed Shack-Hartmann wavefront sensor, which consists of a microlens array with 100 × 100 elements and a video camera with a resolution of 2048 × 2048 pixels. The reliability of measurements in terms of the space and time resolution, as well as in terms of the minimum levels of phase changes induced by the tested object, is analyzed.
|
