OPTICAL CHARACTERISTICS OF A GAS DISCHARGE RADIATOR OF ORANGE-RED SPECTRAL RANGE 

Abstract.

Purpose. To study the optical characteristics and parameters of gas-discharge plasma of the radiator in the orange-red spectral range, the working medium of which was a gas-discharge plasma based on mixtures of cadmium diiodide with helium and small additions of xenon. Methods. The creation of a gas-discharge plasma and the excitation of the components of the working mixture were carried out by a pulse-periodic (pulse repetition rate of 18-20 kHz, pulse duration 150 ns) barrier discharge. Plasma parameters were calculated as total integrals of the electron energy distribution function (EEDF) based on the Boltzmann equation in the two-term approximation. EEDF calculations were carried out using the well-known Bolsig + program. Results. Emission of exciplex molecules of cadmium monoiodide, cadmium atoms, xenon was revealed. Regularities have been established in the changes in the optical characteristics of the emitter depending on the repetition rate of the pump pulses, the component and quantitative composition of the mixtures. Regularities are determined in the transport characteristics of electrons in a plasma, as well as in the excitation rate constants of exciplex molecules of cadmium monoiodide, cadmium atoms, and xenon. Conclusions. The research data are of interest for the creation of an excilamp that has simultaneous emission in the violet, green, red, and infrared spectral ranges. Such an excilamp can be used in biotechnology, agrophysics, for more efficient control of photosynthesis, growth, development of plants and algae, in research in quantum electronics, for pumping solid and liquid lasers and in medicine

Keywords: gas-discharge radiation sources, barrier discharge, cadmium diiodide, exciplex molecules, helium, xenon

https://doi.org/10.24144/2415-8038.2020.47.82-93