Persistence of atomic spectral line on laser-induced Cu plasma with spatial confinement

This paper carries out the spatial confinement effect on laser-induced Cu breakdown spectroscopy in a cylindrical cavity via a nanosecond pulsed Q-switch Nd:YAG laser operating at a wavelength of 1064 nm. The temporal evolution of the laser-induced plasma spectroscopy is used to investigate the char...

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Veröffentlicht in:Physics of plasmas 2016-11, Vol.23 (11)
Hauptverfasser: Wang, Ying, Chen, Anmin, Sui, Laizhi, Li, Suyu, Liu, Dunli, Wang, Xiaowei, Jiang, Yuanfei, Huang, Xuri, Jin, Mingxing
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container_end_page
container_issue 11
container_start_page
container_title Physics of plasmas
container_volume 23
creator Wang, Ying
Chen, Anmin
Sui, Laizhi
Li, Suyu
Liu, Dunli
Wang, Xiaowei
Jiang, Yuanfei
Huang, Xuri
Jin, Mingxing
description This paper carries out the spatial confinement effect on laser-induced Cu breakdown spectroscopy in a cylindrical cavity via a nanosecond pulsed Q-switch Nd:YAG laser operating at a wavelength of 1064 nm. The temporal evolution of the laser-induced plasma spectroscopy is used to investigate the characteristics of spectral persistence. The atomic spectral persistence in plasma generated from Cu with spatial confinement is experimentally demonstrated, where the results indicate that the diameter of the confinement cavity plays a very important role in the persistence of an excited neutral Cu emission line, while the depth of the confinement cavity is almost independent of Cu (I) line persistence. As the diameter of the confinement cavity increases, the persistence of the Cu (I) line in the plasma grows longer under a certain limit. The likely reason for this phenomenon is that under spatial confinement, the reflected shockwave compresses the plasma and leads to an increase in the plasma temperature and density at a certain delay time, which causes further excitation of atomic population to higher excited levels. Finally, the collision rate between particles in the plasma plume is increased.
doi_str_mv 10.1063/1.4968225
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The temporal evolution of the laser-induced plasma spectroscopy is used to investigate the characteristics of spectral persistence. The atomic spectral persistence in plasma generated from Cu with spatial confinement is experimentally demonstrated, where the results indicate that the diameter of the confinement cavity plays a very important role in the persistence of an excited neutral Cu emission line, while the depth of the confinement cavity is almost independent of Cu (I) line persistence. As the diameter of the confinement cavity increases, the persistence of the Cu (I) line in the plasma grows longer under a certain limit. The likely reason for this phenomenon is that under spatial confinement, the reflected shockwave compresses the plasma and leads to an increase in the plasma temperature and density at a certain delay time, which causes further excitation of atomic population to higher excited levels. 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The temporal evolution of the laser-induced plasma spectroscopy is used to investigate the characteristics of spectral persistence. The atomic spectral persistence in plasma generated from Cu with spatial confinement is experimentally demonstrated, where the results indicate that the diameter of the confinement cavity plays a very important role in the persistence of an excited neutral Cu emission line, while the depth of the confinement cavity is almost independent of Cu (I) line persistence. As the diameter of the confinement cavity increases, the persistence of the Cu (I) line in the plasma grows longer under a certain limit. The likely reason for this phenomenon is that under spatial confinement, the reflected shockwave compresses the plasma and leads to an increase in the plasma temperature and density at a certain delay time, which causes further excitation of atomic population to higher excited levels. 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The temporal evolution of the laser-induced plasma spectroscopy is used to investigate the characteristics of spectral persistence. The atomic spectral persistence in plasma generated from Cu with spatial confinement is experimentally demonstrated, where the results indicate that the diameter of the confinement cavity plays a very important role in the persistence of an excited neutral Cu emission line, while the depth of the confinement cavity is almost independent of Cu (I) line persistence. As the diameter of the confinement cavity increases, the persistence of the Cu (I) line in the plasma grows longer under a certain limit. The likely reason for this phenomenon is that under spatial confinement, the reflected shockwave compresses the plasma and leads to an increase in the plasma temperature and density at a certain delay time, which causes further excitation of atomic population to higher excited levels. 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subjects Collision rates
Confinement
Delay time
Laser plasmas
Lasers
Line spectra
Neodymium lasers
Plasma
Plasma physics
Plasma spectra
Plasma temperature
Semiconductor lasers
Spectroscopy
Spectrum analysis
YAG lasers
title Persistence of atomic spectral line on laser-induced Cu plasma with spatial confinement
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