8th International Workshop on Radiation of High Temperature Gases for Space Missions

How atomic nitrogen overpopulation enhances molecular radiation in a recombining nitrogen flow?

27 Mar 2019, 09:30

30m

Campus Puerta de Toledo of the Universidad Carlos III, Madrid, Spain

Workshop Test Cases Measurement Techniques

Speaker

Augustin TIBERE-INGLESSE (Laboratoire EM2C, CentraleSupelec, CNRS)

Description

We use optical emission spectroscopy to measure spectrally resolved radiation from a recombining nitrogen plasma for temperatures ranging from 3200 to 7000 K. An inductively coupled plasma torch is used to create an equilibrium plasma, which is then forced to rapidly recombine by flowing through a water-cooled tube. The density of atomic nitrogen is measured and found to be overpopulated. This overpopulation has an influence on the measured molecular radiation, enhancing it by a factor up to 100000.

Summary

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