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 |
ISSN | 0584-8547;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 |
DOI | 10.1016/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 | |
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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