Thermal equilibrium in gas-discharge plasma of low pressure mercury lamp

V. I. Gorbunkov; V. I. Solomonov

doi:10.1117/12.2225188

15 December 2015 Thermal equilibrium in gas-discharge plasma of low pressure mercury lamp

V. I. Gorbunkov, V. I. Solomonov

Proceedings Volume 9810, International Conference on Atomic and Molecular Pulsed Lasers XII; 98101L (2015) https://doi.org/10.1117/12.2225188
Event: XII International Conference on Atomic and Molecular Pulsed Lasers, 2015, Tomsk, Russian Federation

Abstract

A study was conducted emission spectra germicidal low pressure mercury lamp at currents 100–306 mA located in a closed opaque cavity. It is shown that the lamps located in the cavity with perfectly reflecting and absorbing internal surfaces, in the emission resonance line of mercury is dominant at λ_r = 253.65 nm. The same pattern is observed in the tube placed in a cavity with diffusely reflecting surface at a low current of about 100 mA. However the picture of spectrum changes at higher discharge current. The spectrum of the lamp with arc discharge at a current of 306 mA contains the maxima of the spectral lines. Its intensities are approximately described by Planck's radiation law at the temperature of 9270 ± 230 K. The mechanisms of establish thermal equilibrium are discussed.

Citation Download Citation

V. I. Gorbunkov and V. I. Solomonov "Thermal equilibrium in gas-discharge plasma of low pressure mercury lamp", Proc. SPIE 9810, International Conference on Atomic and Molecular Pulsed Lasers XII, 98101L (15 December 2015); https://doi.org/10.1117/12.2225188

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