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Fast LIF Approach to NO Rotational Temperature and Density Measurement: Application to a Gas-Dynamic Expansion

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Abstract:

An excitation-detection laser-induced fluorescence (LIF) scheme is proposed for the measurement of the NO rotational temperature and density. It is based on the simultaneous excitation of three NO ro-vibronic transitions from only two - one low and one high - J-rotational levels, with the laser set at a suitable fixed wavelength. The procedure does not require the measurement of the excitation spectrum but only of a well-resolved small spectral region of the fluorescence spectrum. The temperature and the density measurements are based on a reference NO LIF spectrum obtained at a known pressure and temperature that is used as a standard. This method is easy and not time consuming. It has been applied to a gas-dynamic expansion.

Keywords: LASER SPECTROSCOPY; PLASMA JET; THERMOMETRY

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702001950445

Affiliations: 1: Centro di Studio per la Chimica dei Plasmi CNR, c/o Dip. Chimica Università di Bari, via Orabona 4, 70126, Bari, Italy 2: Centro di Studio per la Chimica dei Plasmi CNR, c/o Dip. Chimica Università di Bari, via Orabona 4, 70126 Bari, Italy 3: Institute of Plasma Physics, AV CR, Za Slovankou 3, 18221-Prague, Czech Republic

Publication date: June 1, 2000

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