P 80 Polymer material laser destruction threshold studies [Текст] / V. P. Efremov, V. E. Privalov, P. V. Skripov, P. V. Charty, V. G. Shemanin // Proceedings of SPIE-The International Society for Optical Engineering. - 2005. - Vol. 5447: Lasers for Measurements and Information Transfer 2004. - С. 234-241 Рубрики: ФИЗИКА Кл.слова (ненормированные): POLYMER MATERIALS Аннотация: The polymer films are widely used in any industry as the construction materials with some specific properties. It demands the detail studies of the laser destruction threshold parameters of such a materials irradiated by the he power laser radiation pulse with energy density in range from 0 up to 200 J/cm2. The probability of the target laser ablation destruction versus the incident laser radiation energy density dependencies for any polymers -- the high pressure polyethylene, epoxy compound, polymethylmetacrylate, styrosil and rubber for comparing -- have been a subject of the experimental studies. The plots of the breakdown probability and plasma emission intensity for all of the samples versus energy density dependences have been got and the breakdown energy density for these targets have been determined by this probability is equal to 0,5 or zero plasma intensity condition. These results show that about 11% of absorbed laser pulse energy was transferred to the target as the shock wave spreading in it when the target thickness is greater than the distance which this shock wave spreads in the time of laser pulse action. ?? |