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JOURNALS // Kvantovaya Elektronika // Archive

Kvantovaya Elektronika, 2015 Volume 45, Number 6, Pages 533–539 (Mi qe16185)

This article is cited in 4 papers

Laser plasma

Alpha-spectrometry and fractal analysis of surface micro-images for characterisation of porous materials used in manufacture of targets for laser plasma experiments

A. A. Aushev, S. P. Barinov, M. G. Vasin, Yu. M. Drozdov, Yu. V. Ignat'ev, V. M. Izgorodin, D. K. Kovshov, A. E. Lakhtikov, D. D. Lukovkina, V. V. Markelov, A. P. Morovov, V. V. Shishlov

Federal State Unitary Enterprise "Russian Federal Nuclear Center — All-Russian Research Institute of Experimental Physics", Sarov, Nizhny Novgorod region

Abstract: We present the results of employing the alpha-spectrometry method to determine the characteristics of porous materials used in targets for laser plasma experiments. It is shown that the energy spectrum of alpha-particles, after their passage through porous samples, allows one to determine the distribution of their path length in the foam skeleton. We describe the procedure of deriving such a distribution, excluding both the distribution broadening due to statistical nature of the alpha-particle interaction with an atomic structure (straggling) and hardware effects. The fractal analysis of micro-images is applied to the same porous surface samples that have been studied by alpha-spectrometry. The fractal dimension and size distribution of the number of the foam skeleton grains are obtained. Using the data obtained, a distribution of the total foam skeleton thickness along a chosen direction is constructed. It roughly coincides with the path length distribution of alpha-particles within a range of larger path lengths. It is concluded that the combined use of the alpha-spectrometry method and fractal analysis of images will make it possible to determine the size distribution of foam skeleton grains (or pores). The results can be used as initial data in theoretical studies on propagation of the laser and X-ray radiation in specific porous samples.

Keywords: targets for laser plasma studies, porous materials, alpha-spectrometry, fractal analysis of surface.

PACS: 52.50.Jm, 52.57.Bc, 61.43.Hv

Received: 14.07.2014
Revised: 05.09.2014


 English version:
Quantum Electronics, 2015, 45:6, 533–539

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