Influence of sample temperature on the laser-induced breakdown spectroscopy of a molybdenum–tungsten alloy

2019 ◽  
Vol 34 (12) ◽  
pp. 2378-2384 ◽  
Author(s):  
Ran Hai ◽  
Zhonglin He ◽  
Ding Wu ◽  
Weina Tong ◽  
Harse Sattar ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Electron Density ◽  
Emission Intensity ◽  
Plasma Temperature ◽  
Sample Temperature ◽  
Tungsten Alloy ◽  
Laser Induced Breakdown Spectroscopy ◽  
Spectral Emission ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

During laser ablation, the spectral emission intensity, plasma temperature and electron density increased significantly with increasing sample temperature.

Sample temperature effect on laser ablation and analytical capabilities of laser induced breakdown spectroscopy

2019 ◽  
Vol 34 (3) ◽  
pp. 607-615 ◽  
Author(s):  
V. N. Lednev ◽  
M. Ya. Grishin ◽  
P. A. Sdvizhenskii ◽  
R. D. Asyutin ◽  
R. S. Tretyakov ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Temperature Effect ◽  
Sample Temperature ◽  
Laser Induced Breakdown Spectroscopy ◽  
Ablation Process ◽  
Breakdown Spectroscopy ◽  
Laser Ablation Process ◽  
Laser Induced Breakdown

The influence of sample temperature on the laser ablation process and analytical capabilities of laser induced breakdown spectroscopy (LIBS) was studied systematically.

Nanoparticle-Enhanced Laser Induced Breakdown Spectroscopy Using Copper–Silver and Nickel–Carbon Nanocomposites on Aluminium

2019 ◽  
Vol 18 (03n04) ◽  
pp. 1940022
Author(s):  
V. V. Kiris ◽  
A. V. Butsen ◽  
E. A. Ershov-Pavlov ◽  
M. I. Nedelko ◽  
A. A. Nevar
Keyword(s):  
Laser Ablation ◽  
Emission Intensity ◽  
Aluminum Foil ◽  
Spectral Lines ◽  
Laser Induced Breakdown Spectroscopy ◽  
Cu Nanoparticles ◽  
Laser Plume ◽  
Carbon Nanocomposites ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Composite Ag–Cu and Ni–C nanoparticles were synthesized by laser ablation and spark discharge in liquid, respectively. An amplification of the signal during laser induced breakdown spectroscopy was observed after deposition of the nanoparticles on the surface of an aluminum foil. The emission intensity of the laser plume increased from 2 to 20 times depending on the spectral lines used for the measurements. The intensity growth was higher for Ag–Cu nanoparticles.

Enhancement of intensity in microwave-assisted laser-induced breakdown spectroscopy for remote analysis of nuclear fuel recycling

2014 ◽  
Vol 29 (5) ◽  
pp. 886-892 ◽  
Author(s):  
Motonobu Tampo ◽  
Masabumi Miyabe ◽  
Katsuaki Akaoka ◽  
Masaki Oba ◽  
Hironori Ohba ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Nuclear Fuel ◽  
Emission Intensity ◽  
Ablation Plume ◽  
Wire Antenna ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Microwave Assisted ◽  
Laser Induced Breakdown ◽  
Remote Analysis

In this study, an enhancement of emission intensity from laser ablation plume was achieved by coupling a pulsed microwave using a simple wire antenna

scholarly journals Plasma Temperature and Electron Density Determination Using Laser-Induced Breakdown Spectroscopy (LIBS) in Earth’s and Mars’s Atmospheres

Atoms ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 50
Author(s):  
Julian Stetzler ◽  
Shijun Tang ◽  
Rosemarie C. Chinni
Keyword(s):  
Electron Density ◽  
Plasma Temperature ◽  
The Other ◽  
Laser Induced Breakdown Spectroscopy ◽  
Stark Broadening ◽  
Hydrogen Line ◽  
Electron Densities ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Carbon Peak

The purpose of this study was to calculate and compare the plasma temperatures and electron densities from the laser-induced breakdown spectroscopy (LIBS) data collected by NASA’s Martian rover and compare them to samples measured in Earth’s atmosphere. Using the Boltzmann plots, LIBS plasma temperatures were obtained for each site. The analysis focused on titanium lines that were located in the spectral region between 300 and 310 nm. The electron density was measured using the Stark broadening of the hydrogen line at 656.6 nm; the full width at half maximum (FWHM) of this line can be measured and correlated to the electron density of the plasma. Due to a neighboring carbon peak with the hydrogen line seen in many of the spectra from the Martian sites, the FWHM needed to be calculated using a computer program that completed the other side of the hydrogen line and then it calculated the FWHM for those data samples affected by this. The plasma temperatures and electron densities of the Martian sites were compared to LIBS samples taken on Earth.

Enhanced laser-induced breakdown spectroscopy using the combination of circular and annular laser pulses

2019 ◽  
Vol 34 (10) ◽  
pp. 1982-1987 ◽  
Author(s):  
Ran Hai ◽  
Liying Sun ◽  
Ding Wu ◽  
Zhonglin He ◽  
Harse Sattar ◽  
...  
Keyword(s):  
Trace Elements ◽  
Emission Intensity ◽  
Laser Pulses ◽  
Laser Induced Breakdown Spectroscopy ◽  
Spectral Emission ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Annular Laser

Novel DP-LIBS is an effective way of significantly enhancing the spectral emission intensity and reducing LOD of trace elements.

scholarly journals Standoff Detection of Explosives at 1 m using Laser Induced Breakdown Spectroscopy

2017 ◽  
Vol 67 (6) ◽  
pp. 623 ◽  
Author(s):  
Manoj Kumar Gundawar ◽  
Rajendhar Junjuri ◽  
Ashwin Kumar Myakalwar
Keyword(s):  
Electron Density ◽  
Plasma Temperature ◽  
Laser Induced Breakdown Spectroscopy ◽  
Stark Broadening ◽  
Breakdown Spectroscopy ◽  
Standoff Detection ◽  
Laser Induced Breakdown ◽  
Plasma Characteristics ◽  
Detection Of Explosives ◽  
First Time

<p class="p1">We report the ‘standoff detection’ of explosives at 1 m in laboratory conditions, for the first time in India, using Laser Induced Breakdown Spectroscopy combined with multivariate analysis. The spectra of a set of five secondary explosives were recorded at a distance of 1 m from the focusing as well as collection optics. The plasma characteristics viz., plasma temperature and electron density were estimated from Boltzmann statistics and Stark broadening respectively. Plasma temperature was estimated to be of the order of (10.9 ± 2.1) .103 K and electron density of (3.9 ± 0.5) .1016 cm-3. Using a ratiometric approach, C/H and H/O ratios showed a good correlation with the actual stoichiometric ratios and a partial identification success could be achieved. Finally employing principle component analysis, an excellent classification could be attained.<span class="Apple-converted-space"> </span></p>

Characterization of Amethysts from Sukamara, Central Kalimantan, Using Laser-Induced Breakdown Spectroscopy (LIBS)

2020 ◽  
Vol 1 (2) ◽  
pp. 5-8
Author(s):  
Komang Gde Suastika, Heri Suyanto, Gunarjo, Sadiana, Darmaji
Keyword(s):  
Emission Intensity ◽  
Laser Energy ◽  
Emission Spectra ◽  
Atomic Emission ◽  
Laser Induced Breakdown Spectroscopy ◽  
Chemical Formula ◽  
Central Kalimantan ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Abstract - Laser-Induced Breakdown Spectroscopy (LIBS) is one method of atomic emission spectroscopy using laser ablation as an energy source. This method is used to characterize the type of amethysts that originally come from Sukamara, Central Kalimantan. The result of amethyst characterization can be used as a reference for claiming the natural wealth of the amethyst. The amethyst samples are directly taken from the amethyst mining field in the District Gem Amethyst and consist of four color variations: white, black, yellow, and purple. These samples were analyzed by LIBS, using laser energy of 120 mJ, delay time detection of 2 μs and accumulation of 3, with and without cleaning. The purpose of this study is to determine emission spectra characteristics, contained elements, and physical characteristics of each amethyst sample. The spectra show that the amethyst samples contain some elements such as Al, Ca, K, Fe, Gd, Ba, Si, Be, H, O, N, Cl and Pu with various emission intensities. The value of emission intensity corresponds to concentration of element in the sample. Hence, the characteristics of the amethysts are based on their concentration value. The element with the highest concentration in all samples is Si, which is related to the chemical formula of SiO2. The element with the lowest concentration in all samples is Ca that is found in black and yellow amethysts. The emission intensity of Fe element can distinguish between white, purple, and yellow amethyst. If Fe emission intensity is very low, it indicates yellow sample. Thus, we may conclude that LIBS is a method that can be used to characterize the amethyst samples.Key words: amethyst, impurity, laser-induced, breakdown spectroscopy, characteristic, gemstones

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