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Spectroscopic measurements of N2 molecular bands emitted by the discharge of a sealed off test chamber and a 2 kW CO2slab laser deliver detailed rotational temperature and intensity profiles in the gap between the electrodes as a function ofdifferent discharge parameters. The results give basic information on the behaviour of the discharge and the main plasmaparameters for further investigations. Keywords: Spectroscopic measurements, N2 molecular bands, sealed off CO2 laser , intensity profiles, rotationaltemperature profiles, discharge parameters 2. INTRODUCTION A well known problem associated with the CO2 laser is the partial dissociation of CO2 in an electrical gas dischargeenvironment. To understand the basic principles of this lifetime limiting effect and to regulate it for an optimized operatinglifetime in a sealed off system, it is necessary to have a good knowledge of the main discharge parameters, dischargebehaviour and plasma chemistry as a function of special electrode surface layers and gas composition. In this work, wereport our spectroscopic observations of N2 molecular emission UV bands and Hel lines emitted by discharges in a test |
