A study on soft x-ray spectra from pulsed 1 <i>μ</i>m Nd:YAG laser-induced ytterbium plasmas

Tao WU (吴涛); Jun HE (何俊); Li YANG (杨李); Peixiang LU (陆培祥)

doi:10.1088/2058-6272/aba1da

Plasma Science and Technology > 2020 > 22(10): 105503. > DOI: 10.1088/2058-6272/aba1da

Tao WU (吴涛), Jun HE (何俊), Li YANG (杨李), Peixiang LU (陆培祥). A study on soft x-ray spectra from pulsed 1 μm Nd:YAG laser-induced ytterbium plasmas[J]. Plasma Science and Technology, 2020, 22(10): 105503. DOI: 10.1088/2058-6272/aba1da

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A study on soft x-ray spectra from pulsed 1 μm Nd:YAG laser-induced ytterbium plasmas

¹ Hubei Key Laboratory Optical Information and Pattern Recognition, School of Optical Information and Energy Engineering, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
² Guangdong Intelligent Robotics Institute, Dongguan 523808, People's Republic of China

Funds: he authors wish to acknowledge support from Guangdong Major Project of Basic and Applied Basic Research (No. 2019B030302003) and Hubei Key Laboratory of Optical Information and Pattern Recognition open fund (No. 201908).

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Received Date: April 30, 2020
Revised Date: June 29, 2020
Accepted Date: June 30, 2020

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Abstract

Abstract

The Nd:YAG laser with a wavelength of 1.064 μm was used to generate plasmas on a high-purity solid ytterbium (₇₀Yb) target in a vacuum chamber. The soft x-ray time- and space-integration spectra from the Yb plasmas were measured in the wavelength range of 1.0–8.5 nm under different power densities. The atomic spectral data of the unresolved transition arrays from highly charged Yb ions were calculated based on Cowan's suite of codes, including configuration interaction. The calculated Gaussian envelope of the emission determined by the weighted spontaneous transition rates was compared with the experimental spectra, and a good agreement between them was obtained. The spatial-temporal evolutions of the plasmas under the experimental conditions are simulated based on the collisional-radiative model, enabling the understanding of the mechanism of the plasma conditions for optimal water window waveband emission output.
- laser produced plasma,
- water window sources,
- unresolved transition arrays,
- ytterbium

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References (35)

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