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Comparison of quantitative LIBS analysis of steel standards utilizing single-pulse and double-pulse LIBS
Pořízka, Pavel ; Hrdlička, Aleš (referee) ; Kaiser, Jozef (advisor)
In this diploma thesis the differences between single pulse and double pulse laser induced breakdown spectroscopy (LIBS) methods are discussed. The time evolution of laser induced plasma (LIP) parameters, such electron density, plasma temperature, density of ions and atoms is shown. Selected methods for evaluation of plasma parameters (Boltzmann equation, Saha-Boltzmann equation etc.) are also stated. The theoretical bases of local thermodynamic equilibrium (LTE), which is necessary condition for using of previously stated methods for computation of plasma parameters, are discussed. Diploma thesis also contains the description of each component of our LIBS experimental set up and the way of their optimization. Presented theoretical advantages of DP LIBS method are demonstrated on results of experimental measurements of steel standards.
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Possibilities of using laser spectroscopy for the analyses of inorganic binders and concrete
Kratochvilová, Lucie ; Hrdlička,, Aleš (referee) ; Opravil, Tomáš (advisor)
This master’s thesis is dealing with the possibility of using laser-induced breakdown spectroscopy for the detection of non-metallic elements (e. g. chlorine) in concrete. These elements cause degradation of concrete which leads to a shortening lifetime of reinforced concrete buildings. In the experimental part of thesis, a methodology for the determination of chlorides in concrete will be created and verified. A comparison of the single pulse and the double pulse configuration of the LIBS will be done on the samples containing only pure chemical substances with known concentrations of chlorine.
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Possibilities of using laser spectroscopy for the analyses of inorganic binders and concrete
Kratochvilová, Lucie ; Hrdlička,, Aleš (referee) ; Opravil, Tomáš (advisor)
This master’s thesis is dealing with the possibility of using laser-induced breakdown spectroscopy for the detection of non-metallic elements (e. g. chlorine) in concrete. These elements cause degradation of concrete which leads to a shortening lifetime of reinforced concrete buildings. In the experimental part of thesis, a methodology for the determination of chlorides in concrete will be created and verified. A comparison of the single pulse and the double pulse configuration of the LIBS will be done on the samples containing only pure chemical substances with known concentrations of chlorine.
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Comparison of quantitative LIBS analysis of steel standards utilizing single-pulse and double-pulse LIBS
Pořízka, Pavel ; Hrdlička, Aleš (referee) ; Kaiser, Jozef (advisor)
In this diploma thesis the differences between single pulse and double pulse laser induced breakdown spectroscopy (LIBS) methods are discussed. The time evolution of laser induced plasma (LIP) parameters, such electron density, plasma temperature, density of ions and atoms is shown. Selected methods for evaluation of plasma parameters (Boltzmann equation, Saha-Boltzmann equation etc.) are also stated. The theoretical bases of local thermodynamic equilibrium (LTE), which is necessary condition for using of previously stated methods for computation of plasma parameters, are discussed. Diploma thesis also contains the description of each component of our LIBS experimental set up and the way of their optimization. Presented theoretical advantages of DP LIBS method are demonstrated on results of experimental measurements of steel standards.
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