Author: Sarkar, A.

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1 articles found

Laser-induced plasma electron number density: Stark broadening method versus the Saha-Boltzmann equation

Author: Sarkar, A. ; et. al.

Journal: Plasma Science and Technology (2017)

Fundamentals

DOI: 10.1088/2058-6272/19/2/025403

Authors
Singh, M.

Keywords

plasma parameter; laser induced plasma; plasma electron density; Saha-Boltzmann method; Stark broadening method;INDUCED BREAKDOWN SPECTROSCOPY; SPECTROCHEMICAL ANALYSIS; ALUMINUM-ALLOYS; SOLID SAMPLES; ABLATION; LINES; EMISSION; PARAMETERS; TEMPERATURE; LIBS

Abstract

We report spectroscopic studies on plasma electron number density of laser-induced plasma produced by ns-Nd: YAG laser light pulses on an aluminum sample in air at atmospheric pressure. The effect of different laser energy and the effect of different laser wavelengths were compared. The experimentally observed line profiles of neutral aluminum have been used to extract the excitation temperature using the Boltzmann plot method, whereas the electron number density has been determined from the Stark broadened as well as using the Saha-Boltzmann equation (SBE). Each approach was also carried out by using the Al emission line and Mg emission lines. It was observed that the SBE method generated a little higher electron number density value than the Stark broadening method, but within the experimental uncertainty range. Comparisons of N-e determined by the two methods show the presence of a linear relation which is independent of laser energy or laser wavelength. These results show the applicability of the SBE method for N-e determination, especially when the system does not have any pure emission lines whose electron impact factor is known. Also use of M-g lines gives superior results than Al lines.

Area:

Plasma diagnostics

Material:

Aluminium

Elements:

Lines [nm]:

Al I 257.51 nm Al I 266.04 nm Al I 305.01 nm Al I 308.22 nm Al I 309.27 nm Al I 394.40 nm Al I 396.15 nm Al II 281.62 nm

Lines [nm]:

Mg I 285.21 nm Mg II 279.55 nm

Emmision lines:
Al I 257.51 nm
Al I 266.04 nm
Mg II 279.55 nm
Al II 281.62 nm
Mg I 285.21 nm
Al I 305.01 nm
Al I 308.22 nm
Al I 309.27 nm
Al I 394.40 nm
Al I 396.15 nm

Co-author: Sarkar, A.

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2 articles found

Analysis of simulated high burnup nuclear fuel by laser induced breakdown spectroscopy

Author: Singh, M. ; et. al.

Journal: Spectrochimica Acta Part B: Atomic Spectroscopy (2017)

Applications

DOI: 10.1016/j.sab.2017.03.012

Authors
Banerjee, J. ; Bhagat, R. K. ; Sarkar, A.

Keywords

LIBS; SIMFUEL; AHWR; Argon; Nuclear;INDUCED PLASMAS; URANIUM; THORIUM; LIBS; SPECTROMETRY; EMISSION; GLASS

Abstract

Advanced Heavy Water Reactor (AHWR) grade (Th-U)O-2 fuel sample and Simulated High Burn-Up Nuclear Fuels (SIMFUEL) samples mimicking the 28 and 43 GWd/Fe irradiated burn-up fuel were studied using laser-induced breakdown spectroscopy (LIBS) setup in a simulated hot-cell environment from a distance of >1.5 m. Resolution of <38 pm has been used to record the complex spectra of the SIMFUEL samples. By using spectrum comparison and database matching >60 emission lines of fission products was identified. Among them only a few emission lines were found to generate calibration curves. The study demonstrates the possibility to investigate impurities at concentrations around hundreds of ppm, rapidly at atmospheric pressure without any sample preparation. The results of Ba and Mo showed the advantage of LIBS analysis over traditional methods involving sample dissolution, which introduces possible elemental loss. Limits of detections (LOD) under Ar atmosphere shows significant improvement, which is shown to be due to the formation of stable plasma. (C) 2017 Elsevier B.V. All rights reserved.

Area:

Industry

Material:

Nuclear fuel

Elements:

Lines [nm]:

Mo II 253.85 nm Mo I 255.09 nm Mo II 259.37 nm Mo II 265.34 nm Mo II 266.06 nm Mo II 267.28 nm Mo II 267.33 nm Mo I 267.99 nm Mo II 268.32 nm Mo II 268.80 nm Mo II 270.14 nm Mo II 271.74 nm Mo II 274.63 nm Mo II 276.98 nm Mo II 277.54 nm Mo II 278.00 nm Mo II 281.62 nm Mo II 284.82 nm Mo II 285.32 nm Mo II 286.38 nm Mo II 287.15 nm Mo II 308.76 nm Mo II 312.20 nm Mo I 313.26 nm Mo I 320.88 nm Mo I 383.38 nm Mo I 390.30 nm Mo I 418.83 nm Mo I 470.72 nm

Lines [nm]:

Zr II 256.89 nm Zr II 257.14 nm Zr II 267.86 nm Zr II 270.01 nm Zr II 274.26 nm Zr II 274.59 nm Zr II 284.46 nm Zr II 327.31 nm Zr II 327.93 nm Zr II 328.47 nm Zr II 343.82 nm Zr I 386.39 nm Zr I 389.03 nm Zr I 468.78 nm Zr I 468.85 nm Zr I 471.01 nm Zr I 477.23 nm

Lines [nm]:

Th II 254.81 nm Th II 406.92 nm Th II 420.89 nm Th I 459.54 nm Th II 486.32 nm Th II 491.98 nm Th II 513.11 nm

Lines [nm]:

Ce II 276.14 nm Ce II 322.71 nm Ce I 513.78 nm Ce I 560.13 nm Ce I 569.70 nm

Lines [nm]:

Sr II 407.77 nm Sr II 421.55 nm Sr I 460.73 nm Sr I 496.23 nm

...

Emmision lines:
Mo II 253.85 nm
Th II 254.81 nm
Mo I 255.09 nm
Zr II 256.89 nm
Zr II 257.14 nm
Mo II 259.37 nm
Ba I 264.65 nm
Mo II 265.34 nm
Mo II 266.06 nm
Mo II 267.28 nm
Mo II 267.33 nm
Zr II 267.86 nm
Mo I 267.99 nm
Mo II 268.32 nm
Mo II 268.80 nm
Zr II 270.01 nm
Mo II 270.14 nm
Mo II 271.74 nm
Zr II 274.26 nm
Zr II 274.59 nm
Mo II 274.63 nm
Ce II 276.14 nm
Mo II 276.98 nm
Mo II 277.54 nm
Mo II 278.00 nm
Mo II 281.62 nm
Zr II 284.46 nm
Mo II 284.82 nm
Mo II 285.32 nm
Mo II 286.38 nm
Mo II 287.15 nm
Ru I 290.89 nm
Mo II 308.76 nm
Mo II 312.20 nm
Mo I 313.26 nm
Mo I 320.88 nm
Ce II 322.71 nm
Zr II 327.31 nm
Zr II 327.93 nm
Zr II 328.47 nm
Zr II 343.82 nm
Mo I 383.38 nm
Zr I 386.39 nm
Zr I 389.03 nm
Mo I 390.30 nm
Th II 406.92 nm
Sr II 407.77 nm
Mo I 418.83 nm
Th II 420.89 nm
Sr II 421.55 nm
Nd II 423.24 nm
Ba II 455.40 nm
Th I 459.54 nm
Sr I 460.73 nm
Y I 467.49 nm
Zr I 468.78 nm
Zr I 468.85 nm
Mo I 470.72 nm
Zr I 471.01 nm
Sm I 476.03 nm
Zr I 477.23 nm
Th II 486.32 nm
Nd I 488.38 nm
Y II 490.01 nm
Th II 491.98 nm
Ba II 493.41 nm
Nd I 494.48 nm
Sr I 496.23 nm
Th II 513.11 nm
Ce I 513.78 nm
Ce I 560.13 nm
Ce I 569.70 nm

Short Communication on ""Direct compositional quantification of (U-Th)O-2 - MOX nuclear fuel using ns-UV-LIBS and chemometric regression models""

Author: Singh, M. ; et. al.

Journal: Journal of Nuclear Materials (2017)

Applications Chemometrics

DOI: 10.1016/j.jnucmat.2016.11.025

Authors
Mao, X. L. ; Russo, R. E. ; Sarkar, A.

Keywords

LIBS; Chemometrics; PLSR; Nuclear fuel; AHWR;INDUCED BREAKDOWN SPECTROSCOPY; NANOSECOND 266 NM; WAVELENGTH DEPENDENCE; GLASS; THORIUM; URANIUM; SPECTROMETRY

Abstract

The determination of uranium with composition varying from 0% to 35 wt% in (Th-U)O-2 mixed oxide fuel using laser induced breakdown spectroscopy (LIBS) utilizing partial least square regression (PLSR) has been demonstrated. Good agreement between expected and experiment results using 266 nm, 532 nm and 1064 nm was shown. The analytical results at 266 nm of 2-3% precision and similar to 1% accuracy (bias) satisfy the acceptance criteria range for chemical analysis in the nuclear industry. (C) 2016 ElseVier B.V. All rights reserved.

Area:

Nuclear industry

Material:

Nuclear fuel ; Uranium oxide

Elements:

Lines [nm]:

U II 367.01 nm U II 447.23 nm

Emmision lines:
U II 367.01 nm
U II 447.23 nm

Author: Sarkar, A.

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Co-author: Sarkar, A.

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