|
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
Cracking and damage behavior of tungsten under ELM's like energy loads using millisecond laser pulses
点击次数：
论文类型：期刊论文
发表时间：2015-08-01
发表刊物：21st International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI)
收录刊物：SCIE、EI、CPCI-S、Scopus
卷号：463
页面范围：241-245
ISSN号：0022-3115
摘要：In this work, ELM-like conditions were replicated by exposing tungsten surface to the repetitive millisecond laser pulses, and the damage and surface modification were studied. At a pulse duration of 3 ms, the damage and cracking threshold was found at 0.2-0.3 MJ m(-2) while the melting was observed after 0.5 MJ m(-2) which shifted to lower energy load with increasing the number of shots. In addition, these thresholds significantly dropped to lower energy densities with reduction in pulse durations. At same energy load (0.42 MJ m(-2)), solid particles were ejected from irradiated surface exposed to 3 ms pulses while both solid and liquid droplets splashed from melt layer were observed from surface irradiated with 1 ms pulses. Analysis of exposed W surface and particles ejection from the treated surface indicate that there is no qualitative differences between ion beam and long pulse lasers to simulate the ELM like transient conditions at laboratories. (C) 2014 Elsevier B.V. All rights reserved.