&lt;title&gt;Numerical modeling of laser-matter interaction&lt;/title&gt;

Marczak, J.; Jach, K.; Sarzyński, A.

doi:10.1117/12.500119

Cited by 10 publications

(5 citation statements)

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“…Also the equations of state are included and a model of plastic flow in which dependence of the yield point and the shear modulus on temperature are taken into account [3,4]. Recently, it has been observed growing interest in phenomena of laser radiation interaction with solid bodies in a wide range of power and energy of laser pulses (from removal of submicron superficial layers to laser weapon for remote destruction of large objects) [5][6][7].…”

Section: Equations Of the Problemmentioning

confidence: 99%

LIBS system for elemental analysis of soil samples

et al. 2005

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Laser emission analysis is an efficient method used for determination of quantitative and qualitative composition of chemical elements in materials. For the analyser designs a proper choice of a laser type, stabilisation of its pulse parameters and performance of a high-resolution spectrometer of sufficient responsivity are crucial problems. The correlation-based method of laser induced breakdown spectrometry for soil contamination was presented. A system of laser induced breakdown spectroanalyser and the investigation of a portable laser emission spectro-analyser for analysis of chemical composition of soil samples are described. The results and examples of its applications are given.

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Section: Equations Of the Problemmentioning

confidence: 99%

LIBS system for elemental analysis of soil samples

et al. 2005

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“…The equation of radiation transport and ionisation are described elsewhere [12]. Relation between the internal energy ε -and the temperature T of the medium is defined as [3,10,11]:…”

Section: Theoretical One-dimensional Modelmentioning

confidence: 99%

Numerical Modelling of Laser Cleaning and Conservation of Artworks

Marczak

Jach

Sarzyński

2005

Springer Proceedings in Physics

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Abstract. Laser radiation is often used in cleaning and conservation of artworks. Interaction of laser radiation with matter is so sophisticated process that analytical solutions rarely bring the valuable formulas. Even numerical methods seldom give quantitative insight into the physics of processes. Chemical and physical properties of surface impurity layers may change from point to point within the same sample. In spite of this, theoretical description of laser cleaning is necessary, as it allows to explain some characteristic features of processes under investigation. In this work we present a model for laser pulse interaction with graphite layer placed on aluminium substrate. The model is limited to one dimensional hydrodynamic equation. Numerical calculations and experimental results give a qualitative agreement.

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“…The interactions of high-power beams with matter are very complex and depend on the laser power and duration of the exposition [6]. The process of absorption of the laser radiation by matter involves many phenomena which are difficult to describe and model [7]. Heating, melting, evaporation, formation of clouds of the evaporated material, shock waves generation, ionization and formation of plasma are examples of these phenomena [7,8].…”

Section: Introductionmentioning

confidence: 99%

Development and validation of an inverse method for identification of thermal characteristics of a short laser pulse

et al. 2018

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The paper presents development and validation of an inverse method for the identification of thermal characteristics of a short single laser pulse which stroke in a metal sample. The inverse method was applied to find unknown power of the laser pulse, the dimensionless shape parameter of the super-Gaussian function which describes the beam spatial profile as well as beginning and end times of the exposition of the metal sample to the laser pulse. The proposed inverse algorithm was based on the Levenberg-Marquardt technique as well as on temporal and spatial distributions of temperature on the rear surface of the sample, i.e., the opposite to the irradiated one, measured using the experimental stand. The performed investigations showed that the problem was ill-posed but good accuracy was obtained. The low sensitivity of registered temperature to changes in both power and duration of the pulse affected the retrieving accuracy most significantly. Moreover, the dependence of solution of the inverse problem on the initial guess was observed. The accuracy was also affected by low temporal resolution (500 Hz, with the exposure time from 0.2 to 1 ms) of the IR camera. This resolution affected the temporal sampling of measured temperatures. Despite these problems, the method was able to retrieve unknown pulse parameters with 20-25% accuracy.

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<title>Numerical modeling of laser-matter interaction</title>

Cited by 10 publications

References 1 publication

LIBS system for elemental analysis of soil samples

LIBS system for elemental analysis of soil samples

Numerical Modelling of Laser Cleaning and Conservation of Artworks

Development and validation of an inverse method for identification of thermal characteristics of a short laser pulse

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