Study of Thermal Effect in the Interaction of Nanosecond Capillary Discharge Extreme Ultraviolet Laser with Copper

Cui, Huaiyu; Zhao, Yijun; Khan, Muhammad Usman; Zhao, Dongdi; Fan, Zenghua

doi:10.3390/app10010214

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…The ablation was also studied by Cui H. et al [27] on copper samples, using a laser with a grazing incidence angle of 7 • (in the present study 3 • ), wavelength 46.9 nm, energy 50 µJ and 100 µJ with a pulse width of 1.7 ns. The pulse numbers were 1 to 6.…”

Section: Introductionmentioning

confidence: 75%

Morphological Analysis of Laser Surface Texturing Effect on AISI 430 Stainless Steel

et al. 2022

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Laser surface texturing (LST) is a method to obtain micro-structures on the material’s surface for improving tribological performances, wetting tuning, surface treatment, and increasing adhesion. The material selected for LST is AISI 430 ferritic stainless steel, distinguished by the low cost in manufacturing, corrosion resistance, and high strength at elevated temperature. The present study addresses the morphology of new pattern designs (crater array, ellipse, and octagonal shapes). The patterns are applied on the stainless-steel surface by a non-contact method with high quality and precision nanosecond pulsed laser equipment. The investigation of laser parameter influence on thermal affected area and micro-structures is accomplished by morphological and elemental analysis (SEM + EDX). The parameters of the laser micro-patterning have a marked influence on the morphology, creating groove-type sections with different depths and recast material features. From the SEM characterization, the highest level of recast material is observed for concentric octagon LST design. Its application is more recommended for the preparation of the metal surface before hybrid welding. Additionally, the lack of the oxygen element in the case of this design suggests the possible use of the pattern in hybrid joining.

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Section: Introductionmentioning

confidence: 75%

Morphological Analysis of Laser Surface Texturing Effect on AISI 430 Stainless Steel

et al. 2022

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“…The fringes depth of only several nanometers could be created onto highly sensitive photoresist with hundreds of laser shots exposure, which is not efficient for nano-scale laser processing. In our previous work, a toroidal bare mirror is used to focus the EUV laser [13,14]. The reflectivity reaches 90% because of the grazing incidence.…”

Section: Introductionmentioning

confidence: 99%

Focusing and Wavefront Splitting of an Extreme Ultraviolet Laser with a Tubular Optical Element

Cui

Wang

et al. 2023

Photonics

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A capillary discharge extreme ultraviolet laser is focused and wavefront split at 46.9 nm by a tubular optical element. The reflectivity at 46.9 nm is both simulated and measured to be higher than 90% with a slight optical aberration. The operating principle of the tubular element for focusing and wavefront splitting is discussed. Dense and intense grating-like fringes with a period of ~150 nm are achieved. The method used in this work allows nano-scale processing with extreme ultraviolet laser at single-shot exposure mode.

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Numerical simulation of Ne-like Ar plasma dynamics and laser beam characteristics of 46.9 nm laser excited by capillary discharge

Khan

Zhao

et al. 2020

AIP Advances

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In this work, we performed computer modeling of high electrical discharge in an Ar filled alumina capillary in order to investigate the parameters of the discharge system that may lead to achieve an intense laser beam. One-dimensional magnetohydrodynamics (MHD) simulations were used to study the parameters of discharge produced Ar plasma. The radial evolution of plasma parameters such as electron temperature, electron density, and Ne-like argon density was estimated from MHD simulations. Additionally, the influence of the main discharge current on the pinching time and plasma radius was analyzed with the one-dimensional MHD model. The active medium for lasing is created by a high amplitude main pulse and pre-pulse. Specifically, we investigated the optimum main discharge current and Ar filling pressure. The main discharge current of 30 kA was declared as the best current to obtain the 46.9 nm laser with a 4 mm alumina capillary. The influence of the main discharge current and lasing pressure on laser beam intensity and beam characteristics has been studied theoretically and experimentally. The saturated laser intensity was obtained with a main discharge current of 30 kA. A severe reduction in laser intensity was observed above the main discharge current of 30 kA due to capillary wall ablation. The laser beam divergence was observed to be less than 3.5 mrad. The theoretical results obtained from MHD simulations are in good agreement with the experimental results of laser intensity and laser beam characteristics.

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Study of Thermal Effect in the Interaction of Nanosecond Capillary Discharge Extreme Ultraviolet Laser with Copper

Cited by 5 publications

References 20 publications

Morphological Analysis of Laser Surface Texturing Effect on AISI 430 Stainless Steel

Morphological Analysis of Laser Surface Texturing Effect on AISI 430 Stainless Steel

Focusing and Wavefront Splitting of an Extreme Ultraviolet Laser with a Tubular Optical Element

Numerical simulation of Ne-like Ar plasma dynamics and laser beam characteristics of 46.9 nm laser excited by capillary discharge

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