Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1364/AO.428315

Аннотация: The kinetics of barium photoplasma upon absorption of laser radiation by atoms in the resonant transition at λ = 553.5 nm is studied by numerical simulation. At resonance transition saturation, seed electrons are generated. They gain energy through the superelastic processes and cause avalanche ionization of the gas. The brightening of the medium begins. After the metastable levels of barium are quenched by electrons, the brightening changes to darkening. The numerical results explain the experiment from [J. Appl. Phys. 57, 4968 (1985)], where the darkening effect of barium vapor was first obtained. The second probe laser affected the barium resonance ion line at λ = 493.41 nm and induced fluorescence. The limits of applicability of the optically thin medium model for diagnosing photoplasma are discussed. © 2021 Optical Society of America

Журнал: Applied Optics

Выпуск журнала: Vol. 60, Is. 23

Номера страниц: 6850-6856

ISSN журнала: 1559128X

Издатель: The Optical Society

• Kosarev N.I. (Siberian Federal University, Institute of Non-Ferrous Metals and Materials Science, Department of Fundamental Science Education, Krasnoyarsk, 660025, Russian Federation)

• Scopus
• Web of Science Core Collection