Slicing-response model for ablation mass removal of polyformaldehyde irradiated by pulsed CO_2 laser in vacuum  

作　　者：LI Gan CHENG MouSen LI XiaoKang 

机构地区：[1]National University of Defense Technology, College of Aerospace Science and Engineering

出　　处：《Science China(Technological Sciences)》2015年第1期158-162,共5页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51306203);the Advancing Research Program of NUDT(Grant No.JC14-01-02)

摘　　要：The interaction between CO2 laser and polyformaldehyde(POM)is quite important in the research of laser irradiation effects and mechanisms.At this time,the accuracy of the existing mass-ablation models for POM irradiated by CO2 laser is poor compared with the experimental data.Based on the energy distribution deposited in the POM target,the active area excited by laser is divided into four slices,the ablation slice(the temperature-rising slice,the perturbation slice,and the undisturbed slice),and a slicing response model for the mass ablation of POM induced by pulsed CO2 laser irradiation in vacuum is developed.A formula is deduced to predict the ablated mass areal density from the model and is verified with data from several studies and our own experiments.The results show that our model fits the experimental data quite well before the shielding effect of ablation products becomes notable.The applicability of the model to other materials and the mass ablation in atmosphere are also briefly explored.

关 键 词：laser ablation pulsed CO2 laser polyformaldehyde（POM） ablation model 

分 类 号：TN249[电子电信—物理电子学]