Laser plume evolution in the process of nanopowder preparation using an ytterbium fibre laser

Laser plume evolution in the process of nanopowder preparation using an ytterbium fibre laser

Bibliographic Details
Parent link:Quantum Electronics.— , 1971-
Vol. 46, № 9.— 2016.— [P. 821-828]
Corporate Authors: Национальный исследовательский Томский политехнический университет (ТПУ) Институт неразрушающего контроля (ИНК) Кафедра промышленной и медицинской электроники (ПМЭ), Национальный исследовательский Томский политехнический университет (ТПУ) Институт физики высоких технологий (ИФВТ) Кафедра высоковольтной электрофизики и сильноточной электроники (ВЭСЭ)
Other Authors: Osipov V. V. Vladimir Vasiljevich, Evtushenko G. S. Gennady Sergeevich, Lisenkov V. V. Vasily Viktorovich, Platonov V. V. Vladimir, Podkin A. V., Tikhonov E. V. Evgeny Vasiljevich, Trigub M. V. Maksim Viktorovich, Fedorov K. V. Kirill Valerjevich
Summary:Title screen
We study the laser plume dynamics by means of highspeed shooting in the intrinsic light, as well as using the shadow method with a laser monitor. It is found that the laser plume arising under the impact of a radiation pulse from an ytterbium fibre laser with a power of 670 W on a Nd : Y2O3 target with an Nd concentration of 1 mol % is first a plasma consisting of the target material vapour, and then becomes a mixture of vapour and droplets. The first droplets in this plasma appear in ~200 μs after the formation of the laser plume, and in 400 - 500 μs the major part of the substance is removed in the form of liquid droplets. We have also found that the depth of the laser-produced crater linearly depends on the laser pulse duration, thus confirming the absence of essential shielding of laser radiation by melt droplets. The higher the target transparency, the longer the delay time of the formation of the laser plume and the greater its spread. Sometimes, instead of the laser plume formation, one can observe a light flash inside a semitransparent target. The explanation of these results is presented.
Режим доступа: по договору с организацией-держателем ресурса
Published: 2016
Subjects:
электронный ресурс
труды учёных ТПУ
laser plume
laser monitor
gas-phase method of nanoparticle preparation
ytterbium fibre laser
лазерные мониторы
газофазные методы
наночастицы
иттербий-волоконный лазер
Online Access:https://doi.org/10.1070/QEL16023
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656456

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