Spatial confinement of laser-induced plasma to enhance LIBS sensitivity for trace elements determination in soils

2010 ◽  
Vol 25 (6) ◽  
pp. 837 ◽  
Author(s):  
Andrey M. Popov ◽  
Francesco Colao ◽  
Roberta Fantoni
Keyword(s):  
Trace Elements ◽  
Spatial Confinement ◽  
Laser Induced Plasma

scholarly journals Element dependence of enhancement in optics emission from laser-induced plasma under spatial confinement

2014 ◽  
Vol 29 (4) ◽  
pp. 638 ◽  
Author(s):  
Changmao Li ◽  
Lianbo Guo ◽  
Xiangnan He ◽  
Zhongqi Hao ◽  
Xiangyou Li ◽  
...  
Keyword(s):  
Spatial Confinement ◽  
Laser Induced Plasma

Optimization of distances between the target surface and focal point on spatially confined laser-induced breakdown spectroscopy with a cylindrical cavity

2017 ◽  
Vol 32 (2) ◽  
pp. 367-372 ◽  
Author(s):  
Jin Guo ◽  
Junfeng Shao ◽  
Tingfeng Wang ◽  
Changbin Zheng ◽  
Anmin Chen ◽  
...  
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Focal Point ◽  
Optical Emission ◽  
Target Surface ◽  
Laser Induced Breakdown Spectroscopy ◽  
Spatial Confinement ◽  
Laser Induced Plasma ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

The spatial confinement effect in laser-induced plasma with different distances between the target surface and focal point is investigated by optical emission spectroscopy.

Shift of ionization equilibrium in spatially confined laser induced plasma

2019 ◽  
Vol 34 (10) ◽  
pp. 1975-1981 ◽  
Author(s):  
Aleksandr S. Zakuskin ◽  
Andrey M. Popov ◽  
Timur A. Labutin
Keyword(s):  
Ionization Equilibrium ◽  
Spatial Confinement ◽  
Laser Induced Plasma ◽  
Atomic Lines ◽  
Improve Determination

Spatial confinement of laser-induced plasma leads to shift of ionization equilibrium and can improve determination of elements by their resonant atomic lines.

scholarly journals Ударное сжатие лазерной плазмы для увеличения интенсивности сигнала при спектрометрическом определении микрокомпонентов в рудах

2018 ◽  
Vol 44 (2) ◽  
pp. 79
Author(s):  
А.С. Закускин ◽  
А.М. Попов ◽  
Н.Б. Зоров ◽  
Т.А. Лабутин
Keyword(s):  
Trace Elements ◽  
Laser Plasma ◽  
Signal Intensity ◽  
Signal To Noise Ratio ◽  
Plasma Temperature ◽  
Emission Lines ◽  
Signal To Noise ◽  
Maximum Increase ◽  
Spatial Confinement ◽  
Laser Induced Breakdown

AbstractWe have studied the confinement of laser plasma by shock waves (also known as “spatial confinement” induced on an ore sample, as exemplified by changes in the intensity of Ag I 328.07 nm and Au I 267.60 nm emission lines. It is established that the maximum increase in intensity of these lines is observed at 2- to 2.5-μs delay, which corresponds to an increase in the plasma temperature up to 5900 K. The signal-to-noise ratio upon the spatial confinement of plasma is somewhat reduced, but the overall growth of signal intensity provides increase in the sensitivity of laser-induced breakdown spectrometry for determining trace elements in ores.

Microanalytical Identification of a New Zr-Nb-Fe Phase

1990 ◽  
Vol 48 (2) ◽  
pp. 132-133
Author(s):  
O.T. Woo ◽  
G.J.C. Carpenter
Keyword(s):  
Trace Elements ◽  
Cold Rolling ◽  
Proportionality Factor ◽  
Tube Material ◽  
X Ray ◽  
Metal Foils ◽  
Arc Melting ◽  
Intermetallic Particles ◽  
Intermetallic Precipitates ◽  
Cold Worked

To study the influence of trace elements on the corrosion and hydrogen ingress in Zr-2.5 Nb pressure tube material, buttons of this alloy containing up to 0.83 at% Fe were made by arc-melting. The buttons were then annealed at 973 K for three days, furnace cooled, followed by ≈80% cold-rolling. The microstructure of cold-worked Zr-2.5 at% Nb-0.83 at% Fe (Fig. 1) contained both β-Zr and intermetallic precipitates in the α-Zr grains. The particles were 0.1 to 0.7 μm in size, with shapes ranging from spherical to ellipsoidal and often contained faults. β-Zr appeared either roughly spherical or as irregular elongated patches, often extending to several micrometres.The composition of the intermetallic particles seen in Fig. 1 was determined using Van Cappellen’s extrapolation technique for energy dispersive X-ray analysis of thin metal foils. The method was employed to avoid corrections for absorption and fluorescence via the Cliff-Lorimer equation: CA/CB = kAB · IA/IB, where CA and CB are the concentrations by weight of the elements A and B, and IA and IB are the X-ray intensities; kAB is a proportionality factor.

XRMF applications of a monolithic, polycapillary, focusing x-ray optic

1996 ◽  
Vol 54 ◽  
pp. 240-241
Author(s):  
D. A. Carpenter ◽  
Ning Gao ◽  
G. J. Havrilla
Keyword(s):  
Trace Elements ◽  
Point Source ◽  
Focal Spot ◽  
Fluorescence Analysis ◽  
X Rays ◽  
Focal Distance ◽  
Spot Diameter ◽  
X Ray ◽  
Focal Spot Diameter

A monolithic, polycapillary, x-ray optic was adapted to a laboratory-based x-ray microprobe to evaluate the potential of the optic for x-ray micro fluorescence analysis. The polycapillary was capable of collecting x-rays over a 6 degree angle from a point source and focusing them to a spot approximately 40 µm diameter. The high intensities expected from this capillary should be useful for determining and mapping minor to trace elements in materials. Fig. 1 shows a sketch of the capillary with important dimensions.The microprobe had previously been used with straight and with tapered monocapillaries. Alignment of the monocapillaries with the focal spot was accomplished by electromagnetically scanning the focal spot over the beveled anode. With the polycapillary it was also necessary to manually adjust the distance between the focal spot and the polycapillary.The focal distance and focal spot diameter of the polycapillary were determined from a series of edge scans.

Trace Elements and Iron in Human Metabolism

1979 ◽  
Vol 7 (6) ◽  
pp. 1330-1331
Author(s):  
E. D. WILLS
Keyword(s):  
Trace Elements ◽  
Human Metabolism
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