Low-Threshold Optical Breakdown Of Compacted Samples From Energetic And Inert Materials; Energy Fluxes and Radiation Effects (EFRE-2020 online)

Low-Threshold Optical Breakdown Of Compacted Samples From Energetic And Inert Materials; Energy Fluxes and Radiation Effects (EFRE-2020 online)

Dettagli Bibliografici
Parent link:Energy Fluxes and Radiation Effects (EFRE-2020 online).— 2020.— [P. 911-916]
Enti autori: 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
Altri autori: Oleshko V. I. Vladimir Ivanovich, Yakovlev A. N. Aleksey Nikolaevich, Tsipilev V. P. Vladimir Papilovich, Alekseev N. A. Nikolay Anatoljevich
Riassunto: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
Lingua:inglese
Pubblicazione: 2020
Soggetti:
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
Accesso online:https://doi.org/10.1109/EFRE47760.2020.9242003
Natura: Elettronico Capitolo di libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663080

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