Author: Villarreal, A. E.

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1 articles found

Cleaning of Tantalum Capacitor Electrode Surface by Laser in Multipulse Regime

Author: Villarreal, A. E. ; et. al.

Journal: Emerging Challenges for Experimental Mechanics in Energy and Environmental Applications (2017)

Applications

DOI: 10.1007/978-3-319-28513-9_48

Authors
Flores, T. ; Frias, A. K. ; Ponce, L. ; Rendon, F. G. ; Vazquez-Bautista, G.

Keywords

Capacitor; Tantalum; LIBS; Multipulse; Nd:YAG laser;INDUCED BREAKDOWN SPECTROSCOPY; ABLATION; LIBS

Abstract

In this paper a method for cleaning tantalum capacitors terminals, using the technique of selective ablation by pulsed laser is proposed. Such ablation is studied by the LIBS technique to characterize capacitors and determine the resin composition and possible contaminants adhered. In addition, OCT measurements are performed to recreate the damage done to the samples.

Area:

Cleaning ; Industry

Material:

Capacitor

Elements:

Lines [nm]:

Fe I 323.94 nm Fe I 334.58 nm Fe I 358.12 nm Fe I 382.78 nm Fe I 500.57 nm Fe I 518.01 nm

Lines [nm]:

Ta I 539.60 nm Ta I 593.98 nm Ta I 648.54 nm Ta I 294.02 nm Ta I 429.44 nm

Lines [nm]:

Mn II 252.05 nm Mn I 280.11 nm Mn I 367.70 nm Mn II 308.57 nm

Lines [nm]:

Ag I 328.07 nm Ag I 338.29 nm Ag I 520.91 nm Ag I 546.55 nm

Lines [nm]:

H I 656.28 nm

...

Emmision lines:
Mn II 252.05 nm
Mn I 280.11 nm
Ta I 294.02 nm
Mn II 308.57 nm
Fe I 323.94 nm
Ag I 328.07 nm
Fe I 334.58 nm
Ag I 338.29 nm
Fe I 358.12 nm
Mn I 367.70 nm
Fe I 382.78 nm
Co I 395.66 nm
Ta I 429.44 nm
Fe I 500.57 nm
Fe I 518.01 nm
Ag I 520.91 nm
Ta I 539.60 nm
Ag I 546.55 nm
Na I 589.00 nm
Ta I 593.98 nm
C I 610.85 nm
Ta I 648.54 nm
H I 656.28 nm

Co-author: Villarreal, A. E.

Search results

3 articles found

The Technique of Laser-Induced Breakdown Spectroscopy for Determination of Heavy Metals in the Receiving Body of Water

Author: Frias, A. K. ; et. al.

Journal: Emerging Challenges for Experimental Mechanics in Energy and Environmental Applications (2017)

Applications

DOI: 10.1007/978-3-319-28513-9_3

Authors
Dominguez, M. ; Flores, T. ; Ortega, R. ; Ponce, L. ; Sauz, F. G. R. ; Villarreal, A. E.

Keywords

LIBS; Metals; Laser Nd: YAG; Multipulse; Neural networks;CLOUD POINT EXTRACTION; QUANTITATIVE-ANALYSIS; ENVIRONMENTAL-SAMPLES; AQUEOUS-SOLUTION; SPECTROMETRY; LIBS; IONS; PULSE; ICE

Abstract

Increasing human activity has highlighted the need for rapid and accurate chemical analysis of contaminants. Laser Induced Plasma Spectroscopy (LIBS) is an ideal solution because it has advantages such as in-situ analysis capable, it does not require sample preparation and the amount of sample required for analysis is minimal. This paper uses LIBS for heavy metals analysis in receiving water bodies. The LIBS system employed uses a Q: Switched multipulsed Nd: YAG laser, which favors the intensity of the emission spectra, showing sharper and improved detection limits. The obtained results are used in training a neural network to predict the elemental composition.

Area:

Environment

Material:

Received water body

Elements:

Lines [nm]:

Cu I 324.75 nm Cu I 327.40 nm Cu I 510.55 nm Cu I 515.32 nm Cu I 521.82 nm Cu I 578.21 nm Cu I 396.42 nm Cu I 406.95 nm

Lines [nm]:

Ni I 231.10 nm Ni I 345.85 nm Ni I 361.94 nm Ni I 508.05 nm

Lines [nm]:

Mo I 284.44 nm Mo I 313.26 nm Mo I 567.36 nm Mo I 588.83 nm

Lines [nm]:

N II 395.59 nm N II 464.31 nm N II 500.52 nm

Lines [nm]:

O I 610.63 nm O II 520.67 nm

...

Emmision lines:
Ni I 231.10 nm
Mo I 284.44 nm
Mo I 313.26 nm
Cu I 324.75 nm
Cu I 327.40 nm
Ni I 345.85 nm
Ni I 361.94 nm
Sr I 392.59 nm
N II 395.59 nm
Cu I 396.42 nm
Cu I 406.95 nm
Cr I 425.44 nm
N II 464.31 nm
Fe I 499.91 nm
N II 500.52 nm
Ni I 508.05 nm
Cu I 510.55 nm
Cu I 515.32 nm
Cr I 520.45 nm
O II 520.67 nm
Cu I 521.82 nm
Mo I 567.36 nm
Cu I 578.21 nm
Mo I 588.83 nm
Na I 589.00 nm
O I 610.63 nm
H I 656.28 nm

Applications of Laser Induced Breakdown Spectroscopy in the Identification of Bacteria

Author: Sauz, F. G. R. ; et. al.

Journal: Emerging Challenges for Experimental Mechanics in Energy and Environmental Applications (2017)

Applications Chemometrics

DOI: 10.1007/978-3-319-28513-9_4

Authors
Frias, A. K. ; Izaguirre, R. O. ; Ponce, L. ; Reyes, T. F. ; Villarreal, A. E.

Keywords

LIBS; Bacteria; Neural network; K-means; Spectroscopy;LIBS

Abstract

LIBS technique was used to obtain spectra of Escherichia coli and Staphylococcus aureus for identifying characteristic emission lines and then they were analyzed by K-means classifier for neural network feasibility. The potential of this method for bacteria identification was demonstrated.

Area:

Health

Material:

Escherichia coli

Elements:

Lines [nm]:

Ca I 422.67 nm Ca I 558.88 nm Ca II 393.37 nm Ca II 396.85 nm

Lines [nm]:

O I 615.82 nm O I 777.19 nm O II 411.92 nm

Lines [nm]:

H I 486.14 nm H I 656.28 nm

Lines [nm]:

Na I 589.00 nm Na I 589.59 nm

Lines [nm]:

K I 766.49 nm K I 769.90 nm

...

Emmision lines:
Fe I 373.33 nm
Mg I 382.94 nm
Ca II 393.37 nm
Ca II 396.85 nm
O II 411.92 nm
Ca I 422.67 nm
H I 486.14 nm
Ca I 558.88 nm
Na I 589.00 nm
Na I 589.59 nm
O I 615.82 nm
H I 656.28 nm
Fe I 670.36 nm
K I 766.49 nm
K I 769.90 nm
O I 777.19 nm

Development of an Automated Laser Induced Breakdown Spectroscopy System for Compositional Mapping of Surfaces

Author: Flores, E. P. ; et. al.

Journal: Emerging Challenges for Experimental Mechanics in Energy and Environmental Applications (2017)

Applications

DOI: 10.1007/978-3-319-28513-9_22

Authors
Del Valle, R. G. ; Torres, J. R. D. ; Villarreal, A. E.

Keywords

Arduino; LabView; LIBS; Spectrometry; Mapping; Automate; Visual interface;

Abstract

In this work it is described the integration of a system capable of performing automatically the compositional mapping of surfaces, by the method of laserinduced breakdown spectroscopy. This system consists of a mobile mechanical base, a control system whose processing center is a development board Arduino Mega, which interacts with the user through a visual environment programmed in National Instruments LabVIEW and a piece of software for processing the spectrum obtained. Also, it describes the first experimental tests and shows preliminary results.

Area:

Instrumentation

Material:

Coin ; Surface

Elements:

Lines [nm]:

Zn I 330.26 nm Zn I 330.29 nm Zn I 468.01 nm Zn I 472.22 nm Zn I 636.23 nm

Lines [nm]:

Al I 394.40 nm Al I 396.15 nm

Emmision lines:
Zn I 330.26 nm
Zn I 330.29 nm
Al I 394.40 nm
Al I 396.15 nm
Zn I 468.01 nm
Zn I 472.22 nm
Zn I 636.23 nm

Author: Villarreal, A. E.

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Co-author: Villarreal, A. E.

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