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Plasma properties of a laser-ablated aluminum target in air

Published online by Cambridge University Press:  22 July 2003

MINJU YING ,
YUEYUAN XIA ,
YUMING SUN ,
MINGWEN ZHAO ,
YUCHEN MA ,
XIANGDONG LIU ,
YUFEI LI  and
XUEYUAN HOU
MINJU YING
Affiliation:
Department of Optoelectronics, Shandong University, Jinan, Shandong, P.R.China
YUEYUAN XIA
Affiliation:
Department of Physics, Shandong University, Jinan, Shandong, P.R.China
YUMING SUN
Affiliation:
Department of Optoelectronics, Shandong University, Jinan, Shandong, P.R.China
MINGWEN ZHAO
Affiliation:
Department of Physics, Shandong University, Jinan, Shandong, P.R.China
YUCHEN MA
Affiliation:
Department of Optoelectronics, Shandong University, Jinan, Shandong, P.R.China
XIANGDONG LIU
Affiliation:
Department of Physics, Shandong University, Jinan, Shandong, P.R.China
YUFEI LI
Affiliation:
Department of Optoelectronics, Shandong University, Jinan, Shandong, P.R.China
XUEYUAN HOU
Affiliation:
Department of Optoelectronics, Shandong University, Jinan, Shandong, P.R.China
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Abstract

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The optical emission spectra of the plasma generated by a 1.06-μm Nd:YAG laser irradiation of Al target in air was recorded and analyzed in a spatially resolved manner. Electron temperatures and densities in the plasma were obtained using the relative emission intensities and the Stark-broadened linewidths of Al(I) emission lines, respectively. The dependence of the electron density and temperature on the distance from the target surface and on the laser irradiance were manifested. We also discussed how the air takes part in the plasma evolution process and confirmed that the ignition of the air plasma was by the collisions between the energetic electrons and the nitrogen atoms through a cascade avalanche process.

Keywords

Laser-ablated aluminumOptical emissionElectron density
Type
Research Article
Information
Laser and Particle Beams , Volume 21 , Issue 1 , January 2003 , pp. 97 - 101
Copyright
2003 Cambridge University Press