Spectroscopic diagnostics of laser-induced plasmas

Konjević, N.; Ivković, M.; Jovičević, S.

doi:10.1016/j.sab.2010.03.009

Cited by 85 publications

(42 citation statements)

References 44 publications

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“…References describing in detail the equations and methods listed in these tables can also be found in various book chapters and review articles: to cite just a few, for example, Zwicker,20 LochteHoltgreven, 21 Cabannes and Chapelle, 22 Mermet, 28 Blades, 29,30 van der Mullen, [32][33][34] Konjevic,43,56 Konjevic and Roberts, 92 Eddy, 93 Fincke, 94 Jonkers et al, 95 and Calzada. 96 With regard to the articles cited, they can be divided into broad categories dealing with population distributions and deviations from equilibrium, [97][98][99][100][101][102][103][104][105][106][107][108][109][110] classification of diagnostic methods, 111,112 local and space-integrated intensity definitions, 113,114 ion-toneutral ratios and their diagnostic relevance, [115][116][117][118][119][120][121][122][123][124][125] line-to-continuum ratios, …”

Section: Local Thermodynamic Equilibrium Theoretical Equilibrium Expmentioning

confidence: 99%

“…The list includes specific chapters dealing with non-laser-based plasmas, [19][20][21][22]28,29,41 chapters on laser-material interaction, 24,26,31,36,38,42 reviews on various aspects of non-laser-based plasmas, 30,[32][33][34][35]40,43,45,51,56 and finally reviews on laser plasmas and laser-material interaction. 23,25,27,37,39,44,[46][47][48][49][50][52][53][54][55] We mention here specifically the recent review of Aragón and Aguilera, 52 which is highly relevant to the present article.…”

Section: Introductionmentioning

confidence: 99%

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Laser-Induced Breakdown Spectroscopy (LIBS), Part I: Review of Basic Diagnostics and Plasma—Particle Interactions: Still-Challenging Issues within the Analytical Plasma Community

2010

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Laser-induced breakdown spectroscopy (LIBS) has become a very popular analytical method in the last decade in view of some of its unique features such as applicability to any type of sample, practically no sample preparation, remote sensing capability, and speed of analysis. The technique has a remarkably wide applicability in many fields, and the number of applications is still growing. From an analytical point of view, the quantitative aspects of LIBS may be considered its Achilles' heel, first due to the complex nature of the laser–sample interaction processes, which depend upon both the laser characteristics and the sample material properties, and second due to the plasma–particle interaction processes, which are space and time dependent. Together, these may cause undesirable matrix effects. Ways of alleviating these problems rely upon the description of the plasma excitation-ionization processes through the use of classical equilibrium relations and therefore on the assumption that the laser-induced plasma is in local thermodynamic equilibrium (LTE). Even in this case, the transient nature of the plasma and its spatial inhomogeneity need to be considered and overcome in order to justify the theoretical assumptions made. This first article focuses on the basic diagnostics aspects and presents a review of the past and recent LIBS literature pertinent to this topic. Previous research on non-laser-based plasma literature, and the resulting knowledge, is also emphasized. The aim is, on one hand, to make the readers aware of such knowledge and on the other hand to trigger the interest of the LIBS community, as well as the larger analytical plasma community, in attempting some diagnostic approaches that have not yet been fully exploited in LIBS.

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Section: Local Thermodynamic Equilibrium Theoretical Equilibrium Expmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy (LIBS), Part I: Review of Basic Diagnostics and Plasma—Particle Interactions: Still-Challenging Issues within the Analytical Plasma Community

2010

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“…Note, that the shift of this line is red, towards larger wavelengths with respect to the unperturbed transition line at λ 0 . An example of the line measurement can be seen also in [50]. Table 1.…”

Section: Resultsmentioning

confidence: 99%

Spectral Line Shapes of He I Line 3889 Å

Omar

González

et al. 2014

Atoms

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Spectral line shapes of neutral helium 3889 Å (2 3 S-3 3 P ) transition line are calculated by using several theoretical methods. The electronic contribution to the line broadening is calculated from quantum statistical many-particle theory by using thermodynamic Green's function, including dynamic screening of the electron-atom interaction. The ionic contribution is taken into account in a quasistatic approximation, where a static microfield distribution function is presented. Strong electron collisions are consistently considered with an effective two-particle T-matrix approach, where Convergent Close Coupling method gives scattering amplitudes including Debye screening for neutral helium. Then the static profiles converted to dynamic profiles by using the Frequency Fluctuation Model. Furthermore, Molecular Dynamics simulations for interacting and independent particles are used where the dynamic sequence of microfield is taken into account. Plasma parameters are diagnosed and good agreements are shown by comparing our

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“…Para contornar esse problema, foram sugeridas algumas técnicas auxiliares, como o uso do LIBS duplo pulso (Hahn et al 2012), laser com diferentes durações do pulso (Konjevic et al 2010), entre outras técnicas. Dentre elas, a proposta neste trabalho, denominada LIBS-LIF, que se baseia na inserção de um laser em uma transição ressonante de um determinado elemento no sistema, com a finalidade de elevar a intensidade de emissão, denominada LIBS-LIF.…”

Section: Lista De Ilustraçõesunclassified

“…É notório que o desenvolvimento da técnica LIBS esteja intimamente ligado ao avanço de seus equipamentos, com destaque aos lasers, instrumentos espectrais e detectores (Rakovsky et al 2014). Desta forma, buscando contornar o problema da sensibilidade, foram sugeridas algumas técnicas auxiliares, como o uso do LIBS duplo pulso (Hahn et al 2012), laser com diferentes durações do pulso (Konjevic et al 2010), entre outras técnicas. Dentre elas, a proposta neste trabalho, denominada LIBS-LIF, a qual se baseia na inserção de um laser em uma transição ressonante de um determinado elemento no sistema, com a finalidade de elevar a intensidade de emissão, por meio de uma excitação adicional dos analitos, tendo-se em vista que os demais fatores de redução do limite de detecção mencionados já alcançaram um patamar de difícil aprimoramento.…”

Section: Sensibilidade Dos Sistemas Libsunclassified

Desenvolvimento de sistema LIBS-LIF

Fragalli¹

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Spectroscopic diagnostics of laser-induced plasmas

Cited by 85 publications

References 44 publications

Laser-Induced Breakdown Spectroscopy (LIBS), Part I: Review of Basic Diagnostics and Plasma—Particle Interactions: Still-Challenging Issues within the Analytical Plasma Community

Laser-Induced Breakdown Spectroscopy (LIBS), Part I: Review of Basic Diagnostics and Plasma—Particle Interactions: Still-Challenging Issues within the Analytical Plasma Community

Spectral Line Shapes of He I Line 3889 Å

Desenvolvimento de sistema LIBS-LIF

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