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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：Professor Dr. Hongbin Ding
其他任职：物理学院学术委员会主任，等离子体联合研究中心主任,中国光学工程学会LIBS专委会副主任, 中国核学会核聚变等离子体分会常务理事，辽宁省物理学会副理事长，国际ITER-ITPA 委员
性别：男
毕业院校：巴塞尔大学
学位：博士
所在单位：物理学院
学科：等离子体物理. 光学工程
联系方式：hding@dlut.edu.cn
电子邮箱：hding@dlut.edu.cn
Evaluation of explosive sublimation as the mechanism of nanosecond laser ablation of tungsten under vacuum conditions
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论文类型：期刊论文
发表时间：2016-08-01
发表刊物：SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
收录刊物：SCIE、EI、Scopus
卷号：122
页面范围：1-8
ISSN号：0584-8547
关键字：Laser-induced breakdown spectroscopy; LIES; Laser ablation modeling; Laser ablation mechanism; ITER; Tungsten
摘要：A non-equilibrium mechanism for nanosecond laser ablation is suggested herein, and its predictions are compared to the results of W experiments performed under vacuum conditions. A mechanism of particle formation is explained via this model, with partial sublimation of the superheated irradiated zone of the target considered to be the mechanism of laser ablation. In this study, a mixture of vapor and particles was explosively generated and subsequently prevented the rest of a laser pulse from reaching its intended target. This mechanism was found to play an essential role in the ablation of W under vacuum conditions, and it provides a theoretical justification for particle formation. Moreover, special considerations were taken into account for the expansion of plasma into a vacuum. The model was evaluated by measuring the mass of ablated particles using a quartz crystal deposition monitor and time-resolved optical emission spectroscopy. The results of this model were found to be in good agreement with experimental values. (C) 2016 Elsevier B.V. All rights reserved.