A comparison of single shot nanosecond and femtosecond polarization-resolved laser-induced breakdown spectroscopy of Al

Nakimana, Agnes; Tao, Haijun; Hao, Zuoqiang; Sun, Chengjian; Gao, Xun; Lin, Jingquan

doi:10.1088/1674-1056/22/1/014209

Cited by 25 publications

(4 citation statements)

References 27 publications

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“…In recent decades, a large amount of research has been devoted to the interaction of lasers with materials in different regimes [ 27 , 28 , 29 , 30 ]. Still, to our knowledge, no research has been dedicated to the interaction of lasers with nickel alloys in different atmospheres.…”

Section: Introductionmentioning

confidence: 99%

Structural and Functional Picosecond Laser Modification of the Nimonic 263 Superalloy in Different Environmental Conditions and Optimization of the Irradiation Process

et al. 2023

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In this experimental study, picosecond laser treatment was performed on a nickel-based superalloy Nimonic 263, aiming to investigate the surface effects induced by irradiation in different atmospheric conditions and, concerning changes in surface composition, regarding the possibility for improvement of its functionality. Besides the varying laser parameters, such as a number of pulses and pulse energy, environmental conditions are also varied. All surface modifications were carried out in standard laboratory conditions and a nitrogen- and argon-rich atmosphere. The resulting topography effects depend on the specific laser treatment and could be categorized as increased roughness, crater formation, and formation of the laser-induced periodic surface structures (LIPSS). Changes in the chemical surface composition are distinguished as the potential formation of the protective oxides/nitrides on the sample surface. Numerous characterization techniques analyse the resulting effects on the topography and surface parameters. The multi-response parametric optimization of the picosecond laser process was performed using an advanced statistical method based on Taguchi’s robust parameter design. Finally, the optimal parameter conditions for Nimonic 263 modification are suggested.

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Section: Introductionmentioning

confidence: 99%

Structural and Functional Picosecond Laser Modification of the Nimonic 263 Superalloy in Different Environmental Conditions and Optimization of the Irradiation Process

et al. 2023

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“…The powerful return stroke current heats the discharge channel to tens of thousands of degrees and forms a plasma channel. The temperature and electrical conductivity are basic parameters reflecting the physical characteristics of a lightning discharge channel (Lu et al 1994;Li et al 2012;Agnes et al 2013). At present, there are few reports on the temperature and other characteristic parameters of positive CG lightning channel.…”

Section: Introductionmentioning

confidence: 99%

Characteristic parameters of positive cloud-to-ground lightning channel

Pan

Chen

et al. 2019

J Earth Syst Sci

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The high time-resolved spectra of two natural positive cloud-to-ground (CG) lightning of which one of them contains multiple return strokes have been taken by a high-speed slit-less spectrograph. On combining with the synchronous electric field change waveform, the temperature, electrical conductivity of the return stroke channel, radius of the core current channel and the peak value of current are calculated. The correlation between the peak current and the time interval of five M components which overlapped with the continuous current following the subsequent return stroke R1 of multiple return strokes positive CG lightning were analysed. The results show that the average temperatures of the return stroke channels for two positive CG lightning are about 28,900-29,800 K, the radius of the core current channel is about 0.36-1.01 cm, the estimated peak currents of the return strokes are about 18.6-38.0 kA, which are all larger than the typical values of common negative CG lightning. The peak currents of the M components are positively correlated with the time intervals between them.

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“…However, LIBS has one major drawback, it has low detection sensitivity for trace elements. In order to improve the sensitivity of LIBS, a number of investigations have been performed, for instance, controlling the atmosphere pressure, multiple pulse excitation [4] , applied polarization-resolved LIBS [5,6] , introduction of inert gas [7−10] , and spectra normalized treating [11,12] . However, there are two drawbacks in the employment of the above methods: firstly, the LIBS setup is complex; and secondly, more than one lasers are used, which causes the cost to increase in the case of multiple pulse excitation.…”

Section: Introductionmentioning

confidence: 99%

Spectral Enhancement of Laser-Induced Breakdown Spectroscopy in External Magnetic Field

Cheng

Gao

et al. 2015

Plasma Sci. Technol.

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In this paper the spectral enhancement of laser-induced breakdown spectroscopy (LIBS) for copper plasma in the presence of a magnetic field is investigated and the temporal-and spatial-resolved plasma emission spectra are analyzed. Experimental results show that the copper plasma atomic and ion spectra have been enhanced in the presence of the external magnetic field. In addition, the Cu I 521.82 nm spectral intensity evolution with delay time appears to have a double peak around the delay time of 2 µs, but that of Cu II 507.57 nm has a sharp decrease because of the electron-atom three body recombination process. The plasma temperature with magnetic confinement is lower than that of the case in the absence of magnetic fields. Finally, the spectral enhancement mechanisms of laser induced breakdown spectroscopy with magnetic confinement are analyzed.

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A comparison of single shot nanosecond and femtosecond polarization-resolved laser-induced breakdown spectroscopy of Al

Cited by 25 publications

References 27 publications

Structural and Functional Picosecond Laser Modification of the Nimonic 263 Superalloy in Different Environmental Conditions and Optimization of the Irradiation Process

Structural and Functional Picosecond Laser Modification of the Nimonic 263 Superalloy in Different Environmental Conditions and Optimization of the Irradiation Process

Characteristic parameters of positive cloud-to-ground lightning channel

Spectral Enhancement of Laser-Induced Breakdown Spectroscopy in External Magnetic Field

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