Low-Threshold Optical Breakdown Of Compacted Samples From Energetic And Inert Materials

Low-Threshold Optical Breakdown Of Compacted Samples From Energetic And Inert Materials

Bibliographic Details
Parent link:	Energy Fluxes and Radiation Effects (EFRE-2020 online): proceedings of 7th International Congress, September 14-26, 2020, Tomsk, Russia/ National Research Tomsk Polytechnic University (TPU) ; Institute of Electrical and Electronics Engineers (IEEE) ; ed. N. A. Ratakhin. [P. 911-916].— , 2020
Corporate Authors:	Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Отделение материаловедения, Национальный исследовательский Томский политехнический университет Инженерная школа неразрушающего контроля и безопасности Отделение электронной инженерии
Other Authors:	Oleshko V. I. Vladimir Ivanovich, Yakovlev A. N. Aleksey Nikolaevich, Tsipilev V. P. Vladimir Papilovich, Alekseev N. A. Nikolay Anatoljevich
Summary:	Title screen The paper studies the threshold, spectral, and kinetic characteristics of the luminescence of compacted samples from inert and energetic materials induced by their irradiation with the first harmonic of a neodymium laser (1064 nm, [tau]=16 ns). The results establish that irradiation of pure (without specially introduced impurities) samples with laser radiation with an energy density of (0.5-3) J/cm2 forms so-calledhot spots on their surface, the characteristics of which are determined by absorbing inhomogeneities (already present or introduced during sample preparation) and parameters of laser radiation. The atomic lines of alkali metals-Na and K-are predominant in the emission spectra. Multi-pulse excitation leads to annealing of absorbing inhomogeneities and increased optical breakdown threshold. In the samples with specially introduced aluminum impurities (composites), the luminescence and destruction thresholds are an order of magnitude smaller; the spatial distribution over the irradiated surface is close to homogeneous, and there are Al atomic lines in the luminescence spectra. The results obtained are interpreted via the concept of low-threshold optical breakdown, which develops on absorbing optical inhomogeneities and leads to the formation of near-surface laser plasma. Режим доступа: по договору с организацией-держателем ресурса
Published:	2020
Subjects:	электронный ресурс труды учёных ТПУ laser radiation compacted samples hot spots lowthreshold optical breakdown surface laser plasma лазерные излучения оптический пробой лазерная плазма горячие точки прессованные образцы
Online Access:	https://doi.org/10.1109/EFRE47760.2020.9242003
Format:	Electronic Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663080

Internet

https://doi.org/10.1109/EFRE47760.2020.9242003