| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Spatial-Resolved Measurement and Analysis of Extreme-Ultraviolet Emission Spectra from Laser-Produced Al Plasmas |
| Shi-Quan Cao1, Mao-Gen Su1,2**, Dui-Xiong Sun1,2, Qi Min1, Chen-Zhong Dong1,2 |
1Key Laboratory of Atomic and Molecular Physics & Functional Material of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070
2Joint Laboratory of Atomic and Molecular Physics, Northwest Normal University and Institute of Modern Physics of Chinese Academy of Sciences, Lanzhou 730070
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| Cite this article: |
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Shi-Quan Cao, Mao-Gen Su, Dui-Xiong Sun et al 2016 Chin. Phys. Lett. 33 045201 |
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Abstract Extreme ultraviolet emission from laser-produced Al plasma is experimentally and theoretically investigated. Spatial-evolution emission spectra are measured by using the spatio-temporally resolved laser produced plasma technique. Based on the assumptions of a normalized Boltzmann distribution among the excited states and a steady-state collisional-radiative model, we succeed in reproducing the spectra at different detection positions, which are in good agreement with experiments. The decay curves about the electron temperature and electron density, as well as the fractions of individual Al ions and average ionization stage with increasing the detection distance are obtained by comparison with the experimental measurements. These parameters are critical points for deeply understanding the expanding and cooling of laser produced plasmas in vacuum.
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Received: 15 December 2015
Published: 29 April 2016
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| PACS: |
52.38.Mf
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(Laser ablation)
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32.30.Jc
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(Visible and ultraviolet spectra)
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52.70.Kz
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(Optical (ultraviolet, visible, infrared) measurements)
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