|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Acoustic Signal for Femtosecond Filament Plasma Grating Characterization in Airстатья Глава в книге
Информация о цитировании статьи получена из
Scopus
Дата последнего поиска статьи во внешних источниках: 26 июня 2019 г.
- Авторы: Shipilo Daniil E., Pankratov Vladislav V., Panov Nikolay A., Makarov Vladimir A., Savel’ev Andrei B., Kosareva Olga G.
- Сборник: Progress in Photon Science
- Серия: Springer Series in Chemical Physics
- Том: 119
- Глава в коллективной монографии
- Год издания: 2019
- Место издания: Springer International Publishing
- Первая страница: 343
- Последняя страница: 353
- DOI: 10.1007/978-3-030-05974-3_17
- Аннотация: We have designed the physical model and numerical algorithm for the simulations of acoustic wave propagation from the source induced by relaxation of a femtosecond plasma grating formed by two crossing filaments in atmospheric air. The model is based on the wave equation with the wave velocity depending on the transverse temperature variation. The algorithm is based on the fine resolution (≈2μm ) numerical grid employed for the description of the plasma channel substructures in the course of femtosecond filamentation. We have shown that the femtosecond plasma grating emits the superposition of two acoustic signals after plasma recombination. One acoustic signal is represented by an isotropic cylindrical waveform with the characteristic spatial scale equal to the filament diameter (100–200 μm) while the other has the spatial scale equal to the plasma grating period in the range 20−40μm . This second wave propagates in the direction parallel to the axis of plasma grating modulation. Based on the simulations, we suggested the noninvasive method for the plasma grating period and the beam convergence angle detection.
- Добавил в систему: Панкратов Владислав Владимирович