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Comparative study on the copper plasma confined with upward and downward conical cavities in laser-induced breakdown spectroscopy
Xu, Boping1,2; Liu, Yinghua1,2; Lei, Bingying1,2; Wang, Jing1,2; Zhang, Wenfu1,2; Wang, Yishan1; Zhao, Wei1; Duan, Yixiang3; Tang, Jie1,2
作者部门瞬态光学研究室
2022-11
发表期刊SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
ISSN0584-8547;1873-3565
卷号197
产权排序1
摘要

In this study, the confinement effects of upward and downward conical cavities on laser-induced copper plasma were investigated by optical emission spectroscopy and fast imaging technique. It follows from the time -integrated spectra, the time-resolved spectra, and the spatial distributions of spectral intensity that the supe-rior enhancement effects on spectral intensity are obtained in the upward conical cavity. Compared to the plasmas without confinement, plasma temperature and electron number density are increased in the presence of upward conical cavity, while no enhancements are obtained in the downward conical cavity. Reflection model of shockwave in a conical cavity is established to interpret these phenomena. The enhancement of the plasma plume confined in the upward conical cavity results from the compression of the plume towards its central region by the shockwave, as well as the accelerated collisions between the particles therein. No enhancement effect of the plasma in the downward conical cavity is obtained because of the radial expansion of plasma plume and the population reduction of excited species in the plasma primary core due to the pressure of oblique downward shockwave. This shockwave reflection model is further verified by the fast imaging, where the direct observation of the plasma plume agrees well with the enhancement effects of the two cavities on the spectral intensity.

关键词Spatially confined LIBS Conical cavity Shockwave Fast imaging
DOI10.1016/j.sab.2022.106528
收录类别SCI
语种英语
WOS记录号WOS:000861943100003
出版者PERGAMON-ELSEVIER SCIENCE LTD
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.opt.ac.cn/handle/181661/96160
专题瞬态光学研究室
通讯作者Tang, Jie
作者单位1.Xian Inst Opt & Precis Mech CAS, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Sichuan Univ, Res Ctr Analyt Instrumentat, Sch Mech Engn, Chengdu 610064, Peoples R China
推荐引用方式
GB/T 7714
Xu, Boping,Liu, Yinghua,Lei, Bingying,et al. Comparative study on the copper plasma confined with upward and downward conical cavities in laser-induced breakdown spectroscopy[J]. SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY,2022,197.
APA Xu, Boping.,Liu, Yinghua.,Lei, Bingying.,Wang, Jing.,Zhang, Wenfu.,...&Tang, Jie.(2022).Comparative study on the copper plasma confined with upward and downward conical cavities in laser-induced breakdown spectroscopy.SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY,197.
MLA Xu, Boping,et al."Comparative study on the copper plasma confined with upward and downward conical cavities in laser-induced breakdown spectroscopy".SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY 197(2022).
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