Two-photon absorption laser-induced fluorescence measurements have been conducted to investigate atomic oxygen temperature and number density in a CO 2 plasma relevant to Martian entry. The high-enthalpy plasma flow has been produced by an inductively heated plasma generator. This paper describes the experimental setup and shows the applicability of laser diagnostics to Mars-relevant plasmas. Particular emphasis is put on the use of the generated data for the numerical simulation of the aerothermal chemistry of a Martian entry. Relative fluorescence signals are calibrated by a procedure using xenon as a reference. This calibration method allows the in situ experimental determination of the instrumental broadening of the spectroscopic setup and thus an accurate temperature measurement. The acquired, highly resolved line profiles of the fluorescence signal yield a translational temperature of 2777 K ± 400 K and a mean number density of 1.55 · 10 19 m 3 ± 60 % .


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    Title :

    Two-Photon Absorption Laser-Induced Fluorescence Investigation of CO 2 Plasmas for Mars Entry


    Contributors:
    Marynowski, T. (author) / Löhle, S. (author) / Fasoulas, S. (author)

    Published in:

    Publication date :

    2014-05-30


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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