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Simulation study demonstrates an electron density threshold governing power degradation in electron-beam controlled TEA-CO2 lasers, suggesting critical parameters for laser design.
In this paper, a new current equation of main discharge of transversely excited atmospheric (TEA) CO2 laser is introduced. The current equation is derived in consideration of the effects of electron collision with laser gas molecules on discharge current. Then, the collision-induced current equation is combined with the discharge circuit model and six-temperature model (6TM) to build theoretical model. Dynamic emission process of e-beam controlled TEA-CO2 laser is simulated using the model. The calculated result is in agreement with the experimental result in [33]. The power characteristics are analyzed for different initial electron densities. As a result, it has been found that there is a critical threshold of initial electron density that influences power characteristics to be deteriorated. The theoretical model can be used in the study of the behavior of gas laser discharge and designing of electron beam controlled TEA-CO2 laser.
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Pak et al. (2026) studied this question.
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