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

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 ran...

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Bibliographic Details
Published in:Journal of Russian laser research 2020-11, Vol.41 (6), p.608-615
Main Authors: Smetanin, I. V., Kurilenkov, Yu. K., Oginov, A. V., Samoylov, I. S.
Format: Article
Language:English
Subjects:
Bursts
Diffusion rate
Discharge
Electrodes
Lasers
Microwaves
Optical Devices
Optics
Photon density
Photonics
Physics
Physics and Astronomy
RF and Optical Engineering
Spontaneous emission
Trapping
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Summary: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 “trapping” 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 trapping regime corresponds to the slow developing diffusion, which characteristic time is larger than the discharge duration.
ISSN:1071-2836
1573-8760
DOI:10.1007/s10946-020-09915-4