Simulation of Electrophysical Processes in Pulse-Periodic Tubular Sources of Powerful Infrared Radiation with Sapphire Shells
Authors: Gradov V.M., Gavrish S.V., Rudakov I.V. | Published: 29.11.2017 |
Published in issue: #6(117)/2017 | |
DOI: 10.18698/0236-3933-2017-6-130-145 | |
Category: Physics | Chapter: Physical Electronics | |
Keywords: radiation source, cesium, nonstationary plasma, radiation transfer, infrared region, mathematical simulation |
In this research we formulate a mathematical model of the discharge in a mixture of Cs--Hg--Xe, with double shells of sapphire as a part of an external electric LCR circuit with a transistor wrench and a duty arc. The model takes into account nonstationary processes in plasma, radiation transfer in the lines and continuous spectrum in the discharge and shells. Within the research we focus on some features of current pulses of a complex frequency structure passing through a plasma column at practically constant voltage on the discharge gap under conditions of a sudden voltage break at the end of the pulse. The study shows how the temperature field in plasma varies in time, as well as pressure and electrical resistance during the pulse and current pause. We pay much attention to the influence of transients on stability of the radiation source. Findings of the research allow us to recommend a computational experiment as an important method for designing radiation sources to determine the part of cesium and mercury doses introduced into the bulb of the radiation source, which directly participates in plasma formation in the discharge gap. In this case, it becomes possible to give a correct interpretation of the available experimental data by the electrical and spectral characteristics of the instruments
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