Инд. авторы:	Zhukov V.P., Bulgakova N.M.
Заглавие:	Role of ambient gas in heating of metal samples by femtosecond pulses of laser radiation
Библ. ссылка:	Zhukov V.P., Bulgakova N.M. Role of ambient gas in heating of metal samples by femtosecond pulses of laser radiation // Thermophysics and Aeromechanics. - 2009. - Vol.16. - Iss. 2. - P.165-176. - ISSN 0869-8643. - EISSN 1531-8699.
Внешние системы:	DOI: 10.1134/S0869864309020012; РИНЦ: 15300518; SCOPUS: 2-s2.0-71449098057; WoS: 000269219300001;
Реферат:	eng: In this work we consider an experimentally observed effect of significant increasing of the residual heat in metal targets at their irradiation with femtosecond laser pulses in an ambient gas in respect to the vacuum conditions. Numerical modelling of heating of a platinum target by femtosecond laser pulses in argon under normal conditions has been performed taking into account gas breakdown in the focussing region of the laser beam in front of the target. The applied model is based on a combination of a thermal model describing heating and phase transitions in irradiated samples and a hydrodynamic model to describe motion of the ambient gas perturbed by laser irradiation as a result of multiphoton ionization. The hot ambient gas is shown to heat efficiently the irradiated sample. The hydrodynamic processes in the ambient gas play an important role in heating.
Издано:	2009
Физ. характеристика:	с.165-176