Discrete and Continuous Models and Applied Computational ScienceDiscrete and Continuous Models and Applied Computational ScienceDiscrete and Continuous Models and Applied Computational Science2658-46702658-7149Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)2518410.22363/2658-4670-2020-28-4-398-405ArticlesСтатьиResearch ArticleNumerical modeling of laser ablation of materialsЧисленное моделирование лазерной абляции материаловAmirkhanovIlkizar V.АмирхановИ. В.

Candidate of Physical and Mathematical Sciences, Head of Sector “Scientific Division of Computational Physics”. Laboratory of Information Technologies

camir@jinr.ruSarkerNil R.СаркерН. Р.

Candidate of Physical and Mathematical Sciences, Senior Researcher “Scientific Division of Computational Physics”. Laboratory of Information Technologies

sarker@jinr.ruSarkhadovIbrohimСархадовИ.

Candidate of Physical and Mathematical Sciences, Senior Researcher “Scientific Division of Computational Physics”. Laboratory of Information Technologies

ibrohim@jinr.ruJoint Institute for Nuclear ResearchОбъединённый институт ядерных исследований15122020284VOL 28, NO4 (2020)ТОМ 28, №4 (2020)39840509122020Copyright ©; 2020, Amirkhanov I.V., Sarker N.R., Sarkhadov I.Copyright ©; 2020, Амирханов И.В., Саркер Н.Р., Сархадов И.2020Amirkhanov I.V., Sarker N.R., Sarkhadov I.Амирханов И.В., Саркер Н.Р., Сархадов И.http://creativecommons.org/licenses/by/4.0https://journals.rudn.ru/miph/article/view/25184

In this paper, we report a numerical simulation of laser ablation of a material by ultrashort laser pulses. The thermal mechanism of laser ablation is described in terms of a one-dimensional nonstationary heat conduction equation in a coordinate system associated with a moving evaporation front. The laser action is taken into account through the functions of the source in the thermal conductivity equation that determine the coordinate and time dependence of the laser source. For a given dose of irradiation of the sample, the profiles of the sample temperature at different times, the dynamics of the displacement of the sample boundary due to evaporation, the velocity of this boundary, and the temperature of the sample at the moving boundary are obtained. The dependence of the maximum temperature on the sample surface and the thickness of the ablation layer on the radiation dose of the incident laser pulse is obtained. Numerical calculations were performed using the finite difference method. The obtained results agree with the results of other works obtained by their authors.

В работе проведено численное моделирование лазерной абляции материала под действием ультракоротких лазерных импульсов. Тепловой механизм лазерной абляции описывается в рамках одномерного нестационарного уравнения теплопроводности в системе координат, связанной с движущимся фронтом испарения. Действие лазера учитывается через функции источника в уравнении теплопроводности, задавая координатную и временную зависимости источника лазера. Для заданной дозы облучения образца получены профили температуры образца при разных временах, динамике перемещения границы образца из-за испарения, скорости перемещения этой границы и температуры образца на движущейся границе. Получены зависимость максимума температуры на поверхности образца и толщины слоя абляции от дозы излучения падающего лазерного импульса. Численные расчеты проведены с применением метода конечных разностей. Полученные результаты согласуются с результатами работ других исследователей.

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