Steplike Behavior in Grain-Size-Dependent Optical Emission of Plasma Induced by Laser-Ablating Granular Material

doi:10.1103/PhysRevApplied.16.024017

	Steplike Behavior in Grain-Size-Dependent Optical Emission of Plasma Induced by Laser-Ablating Granular Material
	Li, Xiao-long 3,4; Li, Ya-ju 3,4; Li, Song-ting 1; Zhou, O-ji 3,4; Chen, Liang-wen 3,4; Meng, Ju 2; Qian, Dong-bin 3,4; Yang, Jie 3,4; Zhang, Shao-feng 3,4; Wu, Yong 2
刊名	PHYSICAL REVIEW APPLIED
	2021-08-10
卷号	16 期号:2 页码:9
ISSN号	2331-7019
DOI	10.1103/PhysRevApplied.16.024017
通讯作者	Qian, Dong-bin(qiandb@impcas.ac.cn)
英文摘要	Optical emission of plasma induced by a pulsed laser ablating the surface of a randomly packed granular (RPG) material in air is investigated experimentally, taking sieved copper microspheres with discrete diameters, d, ranging from 49 to 390 mu m as examples. We find a steplike phenomenon (also called a critical-like phenomenon) in the dependence of plasma emission on the grain size: when d is less than a critical size, only weak emissions are detected; however, when d exceeds the critical size, the emissions abruptly become at least 5 times stronger. Such a phenomenon can be explained by considering the RPG material as a non-Newtonian fluid with a yield stress and an effective viscosity. Specifically, in the range of the grain size above (below) the critical value, the RPG target has a yield stress larger (smaller) than the shock pressure imparted by the energetic processes of plasma generation and expansion, and thus, behaves like an elastic solid (a viscous fluid) to assist (impede) the formation of the plasma with high temperature and high density as an optical emission source for spectrochemical analysis. This work not only has significance in assessing a lower size limit for direct multielement analysis of RPG material using laser-induced breakdown spectroscopy (LIBS), but also shows that the mechanical characteristics of RPG material may be probed using LIBS.
资助项目	National Key RD Program[2017YFA0402300] ; NSFC program[11974359] ; NSFC program[U1632143]
WOS关键词	INDUCED BREAKDOWN SPECTROSCOPY ; SHOCK-WAVE PLASMA ; EXCITED ATMOSPHERIC CO2-LASER ; ELEMENTAL ANALYSIS ; SENSITIVE ANALYSIS ; INSTRUMENT SUITE ; PRESSURE ; POWDERS ; SOIL ; GAS
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000684257000002
资助机构	National Key RD Program ; NSFC program
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/136641]
专题	中国科学院近代物理研究所
通讯作者	Qian, Dong-bin
作者单位	1.Northwest Univ, Inst Photon & Photon Technol, Xian 710069, Peoples R China 2.Inst Appl Phys & Computat Math, Beijing 100000, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiao-long,Li, Ya-ju,Li, Song-ting,et al. Steplike Behavior in Grain-Size-Dependent Optical Emission of Plasma Induced by Laser-Ablating Granular Material[J]. PHYSICAL REVIEW APPLIED,2021,16(2):9.
APA	Li, Xiao-long.,Li, Ya-ju.,Li, Song-ting.,Zhou, O-ji.,Chen, Liang-wen.,...&Ma, Xin-wen.(2021).Steplike Behavior in Grain-Size-Dependent Optical Emission of Plasma Induced by Laser-Ablating Granular Material.PHYSICAL REVIEW APPLIED,16(2),9.
MLA	Li, Xiao-long,et al."Steplike Behavior in Grain-Size-Dependent Optical Emission of Plasma Induced by Laser-Ablating Granular Material".PHYSICAL REVIEW APPLIED 16.2(2021):9.