scholarly journals Effects of temporal laser profile on the emission spectra for underwater laser-induced breakdown spectroscopy: Study by short-interval double pulses with different pulse durations

2015 ◽  
Vol 117 (2) ◽  
pp. 023302 ◽  
Author(s):  
Ayaka Tamura ◽  
Ayumu Matsumoto ◽  
Takashi Nakajima ◽  
Kazuhiro Fukami ◽  
Yukio H. Ogata ◽  
...  
Keyword(s):  
Short Interval ◽  
Emission Spectra ◽  
Laser Induced Breakdown Spectroscopy ◽  
Spectroscopy Study ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Underwater Laser ◽  
Laser Profile

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

Influence of the target material on secondary plasma formation underwater and its laser induced breakdown spectroscopy (LIBS) signal

2017 ◽  
Vol 32 (2) ◽  
pp. 345-353 ◽  
Author(s):  
M. R. Gavrilović ◽  
V. Lazic ◽  
S. Jovićević
Keyword(s):  
Laser Ablation ◽  
Significant Influence ◽  
Material Properties ◽  
Bubble Formation ◽  
Target Material ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Underwater Laser ◽  
Secondary Plasma

The significant influence of the target material properties on subsequent plasma and bubble formation in underwater laser ablation is demonstrated through the examples of α-alumina and pure Al targets.

Single-Pulse Underwater Laser-Induced Breakdown Spectroscopy with Nongated Detection Scheme

2013 ◽  
Vol 85 (8) ◽  
pp. 3807-3811 ◽  
Author(s):  
Ayumu Matsumoto ◽  
Ayaka Tamura ◽  
Kazuhiro Fukami ◽  
Yukio H. Ogata ◽  
Tetsuo Sakka
Keyword(s):  
Single Pulse ◽  
Laser Induced Breakdown Spectroscopy ◽  
Detection Scheme ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Underwater Laser

scholarly journals High sensitivity hydrogen analysis in zircaloy-4 using helium-assisted excitation laser-induced breakdown spectroscopy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Marincan Pardede ◽  
Indra Karnadi ◽  
Rinda Hedwig ◽  
Ivan Tanra ◽  
Javed Iqbal ◽  
...  
Keyword(s):  
Excited State ◽  
Nuclear Power ◽  
Emission Spectra ◽  
Target Material ◽  
High Sensitivity ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Low Concentrations ◽  
Laser Induced Breakdown ◽  
Excitation Laser

AbstractHigh-sensitivity detection of hydrogen (H) contained in zircaloy-4, a commonly used material for nuclear fuel containers, is crucial in a nuclear power plant. Currently, H detection is performed via gas chromatography, which is an offline and destructive method. In this study, we developed a technique based on metastable excited-state He-assisted excitation to achieve excellent quality of H emission spectra in double-pulse orthogonal laser-induced breakdown spectroscopy (LIBS). The production of metastable excited-state He atoms is optimized by using LiF as sub-target material. The results show a narrow full-width-at-half-maximum of 0.5 Å for the H I 656.2 nm emission line, with a detection limit as low as 0.51 mg/kg. Thus, using this novel online method, H in zircaloy-4 can be detected efficiently, even at very low concentrations.

In situ measurements of calcium carbonate dissolution under rising CO2 pressure using underwater laser-induced breakdown spectroscopy

2016 ◽  
Vol 31 (7) ◽  
pp. 1374-1380 ◽  
Author(s):  
Christian L. Goueguel ◽  
Jinesh C. Jain ◽  
Dustin L. McIntyre ◽  
Cantwell G. Carson ◽  
Harry M. Edenborn
Keyword(s):  
High Pressure ◽  
Calcium Carbonate ◽  
Laser Induced Breakdown Spectroscopy ◽  
Carbonate Dissolution ◽  
Breakdown Spectroscopy ◽  
Saturated Water ◽  
Laser Induced Breakdown ◽  
Underwater Laser ◽  
Calcium Carbonate Dissolution

Underwater laser-induced breakdown spectroscopy was applied for rapid in situ measurements of CaCO3 dissolution in CO2-saturated water at high pressure.

Laser-Induced Breakdown Spectroscopy for Polymer Identification

1998 ◽  
Vol 52 (3) ◽  
pp. 456-461 ◽  
Author(s):  
R. Sattmann ◽  
I. Mönch ◽  
H. Krause ◽  
R. Noll ◽  
S. Couris ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Emission Spectra ◽  
Low Density Polyethylene ◽  
Laser Induced Breakdown Spectroscopy ◽  
Spectral Features ◽  
Low Density ◽  
Plasma Emission ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Polymer Type

Laser-induced breakdown spectroscopy has been applied to polymer samples in order to investigate the possibility of using this method for the identification of different materials. The plasma emission spectra of high-density polyethylene (HDPE), low-density polyethylene (LDPE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), and polypropylene (PP) have been studied. Spectral features have been measured—for example, the 725.7 nm chlorine line, the 486.13 mm Hβ line, and the 247.86 nm carbon line—whose evaluation with neural networks permits identification accuracies between 90 and 100%, depending on polymer type.

Sign in / Sign up

Export Citation Format

Share Document