Abstract
We use Letokhov’s concept of stochastic feedback to interpret experiments on X-ray spontaneous emission from a polydisperse plasma of a nanosecond vacuum discharge (NVD) with a virtual cathode. We develop a diffusion model of stochastic propagation of spontaneous X-ray radiation in the volume of randomly located reflecting clusters. The model provides qualitative explanation of both the experimentally observed effects of partial “trap**” and high-intensity bursts of X-ray quanta. The X-ray burst regime is a result of the photon density accumulation which, due to diffusion inside the inter-electrode volume, exceeds the losses from the surface, while the trap** regime corresponds to the slow develo** diffusion, which characteristic time is larger than the discharge duration.
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Smetanin, I.V., Kurilenkov, Y.K., Oginov, A.V. et al. X-Ray Bursts from a Random Cavity Emerging in an Inter-Electrode Polydisperse Plasma of Nanosecond Vacuum Discharge. II. Diffusion Model of X-Ray Emission. J Russ Laser Res 41, 608–615 (2020). https://doi.org/10.1007/s10946-020-09915-4
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DOI: https://doi.org/10.1007/s10946-020-09915-4