Hydrodynamics driven by ultrashort laser pulse: simulations and the optical pump—X-ray probe experiment

Autor:	Tohru Suemoto, Motoyoshi Baba, Tatiana Pikuz, Naoya Kakimoto, A. Ya. Faenov, Yu. V. Petrov, Vasily Zhakhovsky, Yasuo Minami, D. K. Ilnitsky, Noboru Hasegawa, Takuro Tomita, Mitsuru Yamagiwa, Masahiko Ishino, Nail Inogamov, S. I. Ashitkov, Masaharu Nishikino, Mikhail B. Agranat, V. A. Khokhlov, K. P. Migdal, Takashi Eyama, Shodai Takayoshi, Tetsuya Kawachi
Rok vydání:	2015
Předmět:	Materials science Physics and Astronomy (miscellaneous) business.industry Mass flow General Engineering General Physics and Astronomy Laser Fluence law.invention Pulse (physics) Optical pumping Optics law Femtosecond Spallation Surface layer business
Zdroj:	Applied Physics B. 119:413-419
ISSN:	1432-0649 0946-2171
DOI:	10.1007/s00340-015-6039-7
Popis:	Spatial structures of ablative mass flow produced by femtosecond laser pulses are studied. In experiments with a gold film, the Ti:sapp laser pulse having a focal size of 100 microns on a target was used, while a soft X-ray probe pulse was utilized for diagnostics. The experimental data are compared with simulated mass flows obtained by two-temperature hydrodynamics and molecular dynamics methods. Simulation shows evolution of a thin surface layer pressurized after electron–ion thermalization, which leads to melting, cavitation and formation of spallation liquid layer. The calculated asymptotic surface velocity of this layer as a function of fluence is in reasonably good agreement with experimental data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e2e7d5e04e466bdd81fa9a9296286e2f https://doi.org/10.1007/s00340-015-6039-7 Zobrazit plný text záznamu Plný text ve formátu PDF