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Article Dans Une Revue Measurement Science and Technology Année : 2012

On time resolved gas temperature measurements in a pulsed dc plasma using quantum cascade laser absorption spectroscopy

M. Hübner
  • Fonction : Auteur
Olivier Guaitella
Antoine Rousseau
J. Roepcke
  • Fonction : Auteur

Résumé

With a time resolution of 33 µs, the gas temperature in a pulsed dc air plasma admixed with 0.8% NO has been measured by quantum cascade laser absorption spectroscopy (QCLAS). For this purpose, the temperature dependent intensity ratios of two absorption structures of NO at 1900 cm−1 (5.26 µm) have been used. The QCLAS system worked in the Intra Pulse Mode with a pulse repetition frequency of 30 kHz leading to a spectrum recorded each 33 µs. In a low pressure discharge, the influence of nonlinear absorption phenomena causing strong distorted absorption structures of NO has been taken into account by a calibration routine based on tabulated line strengths. Different mean plasma currents have been applied to the discharge leading to gas temperature values ranging from about 300 K up to about 500 K.

Dates et versions

hal-01549451 , version 1 (28-06-2017)

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Citer

M. Hübner, Daniil Marinov, Olivier Guaitella, Antoine Rousseau, J. Roepcke. On time resolved gas temperature measurements in a pulsed dc plasma using quantum cascade laser absorption spectroscopy. Measurement Science and Technology, 2012, 23, pp.115602. ⟨10.1088/0957-0233/23/11/115602⟩. ⟨hal-01549451⟩
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