Abstract
For the first time a microwave discharge located in the plasma of decaying optical breakdown of gas (air and argon at atmospheric pressure) has been generated. Four beams (each with a power of up to 100 kW) were injected sequentially into a volume of ionized rarefied gas which had been generated before hand by -laser radiation. The absorption was 50%, the maximum duration of the interaction of the microwave radiation with the plasma was 0.3-2 ms and was limited by the process of turbulent cooling. Depending on the parameters of the absorbing medium and microwave radiation a semi-self-maintained or self-maintained discharge with a diffusion or spark structure has been generated. A model for the calculation of basic characteristics of the decaying optical breakdown of a microwave discharge in it was suggested.
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