scholarly journals Toward quantitative deuterium analysis with laser-induced breakdown spectroscopy using atmospheric-pressure helium gas

2010 ◽  
Vol 107 (2) ◽  
pp. 023301 ◽  
Author(s):  
Rinda Hedwig ◽  
Zener Sukra Lie ◽  
Koo Hendrik Kurniawan ◽  
Alexander Nikitich Chumakov ◽  
Kiichiro Kagawa ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Helium Gas ◽  
Laser Induced Breakdown

Laser-Induced Breakdown Spectroscopy of Steels at Atmospheric Pressure and in Air

1985 ◽  
Vol 39 (4) ◽  
pp. 727-729 ◽  
Author(s):  
J. Belliveau ◽  
L. Cadwell ◽  
K. Coleman ◽  
L. Hüwel ◽  
H. Griffin
Keyword(s):  
Atmospheric Pressure ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Quantitative hydrogen analysis of zircaloy-4 in laser-induced breakdown spectroscopy with ambient helium gas

2007 ◽  
Vol 46 (34) ◽  
pp. 8298 ◽  
Author(s):  
Muliadi Ramli ◽  
Ken-ichi Fukumoto ◽  
Hideaki Niki ◽  
Syahrun Nur Abdulmadjid ◽  
Nasrullah Idris ◽  
...  
Keyword(s):  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Helium Gas ◽  
Laser Induced Breakdown ◽  
Hydrogen Analysis

scholarly journals Emission Spectrochemical Analysis of Soft Samples Including Raw Fish by Employing Laser-Induced Breakdown Spectroscopy with a Subtarget at Low-Pressure Helium Gas

ACS Omega ◽  
2020 ◽  
Vol 5 (27) ◽  
pp. 16811-16818
Author(s):  
Alion Mangasi Marpaung ◽  
Syahrun Nur Abdulmadjid ◽  
Muliadi Ramli ◽  
Nasrullah Idris ◽  
Ali Khumaeni ◽  
...  
Keyword(s):  
Low Pressure ◽  
Spectrochemical Analysis ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Helium Gas ◽  
Laser Induced Breakdown ◽  
Raw Fish ◽  
Soft Samples

scholarly journals Time-Gated Single-Shot Picosecond Laser-Induced Breakdown Spectroscopy (ps-LIBS) for Equivalence-Ratio Measurements

2020 ◽  
Vol 74 (3) ◽  
pp. 340-346 ◽  
Author(s):  
Mark Gragston ◽  
Paul Hsu ◽  
Anil Patnaik ◽  
Zhili Zhang ◽  
Sukesh Roy
Keyword(s):  
High Pressure ◽  
Atmospheric Pressure ◽  
Equivalence Ratio ◽  
Laser Energy ◽  
Picosecond Laser ◽  
Laser Induced Breakdown Spectroscopy ◽  
Single Shot ◽  
Plasma Emission ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Time-gated picosecond laser-induced breakdown spectroscopy (ps-LIBS) for the determination of local equivalence ratios in atmospheric-pressure adiabatic methane–air flames is demonstrated. Traditional LIBS for equivalence-ratio measurements employ nanosecond (ns)-laser pulses, which generate excessive amounts of continuum, reducing measurement accuracy and precision. Shorter pulse durations reduce the continuum emission by limiting avalanche ionization. Furthermore, by contrast the use of femtosecond lasers, plasma emission using picosecond-laser excitation has a high signal-to-noise ratio (S/N), allowing single-shot measurements suitable for equivalence-ratio determination in turbulent reacting flows. We carried out an analysis of the dependence of the plasma emission ratio Hα (656 nm)/NII (568 nm) on laser energy and time-delay for optimization of S/N and minimization of measurement uncertainties in the equivalence ratios. Our finding shows that higher laser energy and shorter time delay reduces measurement uncertainty while maintaining high S/N. In addition to atmospheric-pressure flame studies, we also examine the stability of the ps-LIBS signal in a high-pressure nitrogen cell. The results indicate that the plasma emission and spatial position could be stable, shot-to-shot, at elevated pressure (up to 40 bar) using a lower excitation energy. Our work shows the potential of using ps-duration pulses to improve LIBS-based equivalence-ratio measurements, both in atmospheric and high-pressure combustion environments.

Quantitative Analysis of Aluminum Alloys by Laser-Induced Breakdown Spectroscopy and Plasma Characterization

1995 ◽  
Vol 49 (4) ◽  
pp. 499-507 ◽  
Author(s):  
Mohamad Sabsabi ◽  
Paolo Cielo
Keyword(s):  
Aluminum Alloy ◽  
Quantitative Analysis ◽  
Electron Density ◽  
Atmospheric Pressure ◽  
Laser Induced Breakdown Spectroscopy ◽  
Excitation Temperature ◽  
Stark Broadening ◽  
Pulsed Nd:Yag Laser ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy has been applied to perform elemental analysis of aluminum alloy targets. The plasma is generated by focusing a pulsed Nd:YAG laser on the target in air at atmospheric pressure. Such a plasma was characterized in terms of its appearance, emission spectrum, space-integrated excitation temperature, and electron density. The electron density is inferred from the Stark broadening of the profiles of ionized aluminum lines. The temperature is obtained by using Boltzmann plots of the neutral iron lines. Calibration curves for magnesium, manganese, copper, and silicon were produced. The detection limits are element-dependent but are on the order of 10 ppm.

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