Mechanism of hot spots formation in pentaerythritol tetranitrate under pulsed laser irradiation

V. I. Oleshko, V. P. Tsipilyov, V. E. Zarko, A. N. Yakovlev, M. A. Mazur

Результат исследований: Материалы для журналарецензирование


The spectral, kinetic, spatial, and amplitude characteristics of emissions of pressed samples of PETN (pentaerythritole tetranitrate) by the first harmonic of a neodymium laser (1064 nm, 12 ns) are studied. It is found that at the moment of irradiation of PETN by laser pulses, hot spots are formed on the surface of the samples. The energy density of laser radiation varies in the range of 0.5-3 J/cm 2 . The characteristics of hot spots are determined by absorbing inhomogeneities and parameters of laser radiation. Multi-pulse excitation leads to the annealing of absorbing irregularities and increased threshold of optical breakdown. The received results are interpreted on the basis of ideas of the low-threshold optical breakdown as evolving within local (defective) regions of the PETN in the electric field of the light wave.

Язык оригиналаАнглийский
Номер статьи012020
ЖурналIOP Conference Series: Materials Science and Engineering
Номер выпуска1
СостояниеОпубликовано - 24 апр 2019
Событие7th International Conference for Young Scientists on High Technology: Research and Applications 2018, HTRA 2018 - Tomsk, Российская Федерация
Продолжительность: 26 ноя 201830 ноя 2018

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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