METHOD FOR SYNCHRONOUS MEASUREMENT OF PLASMA PARAMETERS IN A SHOCK TUBE Russian patent published in 2023 - IPC H05H1/00 G01N27/00 

FIELD: physics of gas discharge.

SUBSTANCE: physics of the study of electrical and emission (radiative) properties of gas in a wide range of temperatures and pressures. The technical result is to provide the ability to measure electrical and optical parameters of plasma at one point in time and in one measuring section with high temporal and spatial accuracy. A method for synchronously measuring plasma parameters in a shock tube, in the wall of which a measuring probe is installed through a technological hole, which is a hollow metal tube of a Langmuir probe with an optical fibre placed inside it, provides for the supply of helium and an explosive mixture into a high-pressure chamber, supply and ignition of the explosive mixture, as a result of combustion, formation of a flat shock wave is ensured, registration of the probe current-voltage characteristic with a Langmuir probe, and subsequent determination of the values of the electrical parameters of the plasma, with simultaneous registration of plasma radiation by an optical fibre in the same measuring section of the shock tube, followed by determination of the optical parameters of the plasma based on the recorded radiation.

EFFECT: thanks to the spatial and temporal simultaneity of the measurements, reliability and validity of the obtained experimental data has significantly increased, and the set of quantities measured during the experiment has expanded, both before arrival of the plasma and at the moment of plasma arrival at the measuring section.

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