Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 40 for “"Laser-induced breakdown"”.
-
Mechanisms of Enhancement in Dual Pulse Laser Induced Breakdown Spectroscopy and Quantitative Measurements of Laser Induced Breakdown Spectroscopy in Bulk Aqueous Solution
… community's understanding and application of Laser Induced Breakdown Spectroscopy (LIBS) during recent years. Chapter one is a broad overview of LIBS as a technique including a brief history, the theory behind the technique, and the instrumentation typically used. This chapter also introduces …
-
Laser-induced breakdown spectroscopy applied to pasture, titanium, and bioplastics
… effective on some agricultural specimens is laserinduced breakdown spectroscopy (LIBS). LIBS is an optical emission technique that utilizes a high-powered pulsed laser to create a plasma on the sample surface. As the plasma cools, photons are emitted at distinct wavelengths corresponding to …
-
Pulsed laser induced breakdown in solid state materials and air
Laser induced breakdown is important in applications ranging from laser machining to laser induced breakdown spectroscopy to laser induced damage. Laser induced breakdown in dielectric materials results from a combination of multiphoton absorption (MPA), tunneling and avalanche ionization. Aspects …
-
Laser-induced breakdown spectroscopy (libs): an innovative tool for studying bacteria
<p>Laser-induced breakdown spectroscopy (LIBS) has gained a reputation as a flexible and convenient technique for rapidly determining the elemental composition of samples with minimal or no sample preparation. In this dissertation, I will describe the benefits of using LIBS for the rapid …
-
Multi-scale modeling of laser induced breakdown in non-equilibrium plasmas
This dissertation discusses the modeling of breakdown of gases under nano-second laser discharges, the plasma kernel dynamics, the plasma core decay, and the subsequent post-dischargee hydrodynamics, together with some of its engineering applications (e.g., flow control and ignition of combustible …
-
Study of the Mechanism of the Coal Analysis by Laser-Induced Breakdown Spectroscopy
… technology which can analyze the coal rapidly. Laser-induced breakdown spectroscopy (LIBS) is a new technology which has the advantages of the quick and multi-elemental analysis, thus it can be applied for the coal analysis. The theoretical analysis and experimental research are used in the …
-
Online sorting of wood treated with chromated copper arsenate using laser induced breakdown spectroscopy
… efforts to develop an online detector using laser induced breakdown spectroscopy (LIBS) technology. By forming a plasma on the surface of the wood, the detector analyzed the spectral emission from the plasma to identify the metals present in the wood sample. This analytical process was …
-
Laser-Induced Breakdown Spectroscopy of Micron Sized Particles with the Consideration of Industrial Applications
Laser-induced breakdown spectroscopy (LIBS) is a technology for performing spectral analysis of materials with little sample preparation, rapid measurement times, and minimal damage to the sample. Micro-LIBS is a form of LIBS which can be used to study micron-sized particles. Micron-sized particles …
-
Use of absorption laser-induced breakdown spectroscopy in characterization of actinide species and oxides
The student, Emily Weerakkody, submitted this Thesis for approval on 2018-12-10 at 17:23.
-
Development and Validation of Laser-Induced Breakdown Spectroscopy Methods for the Analysis of Aqueous Solutions
<p>Laser-induced breakdown spectroscopy (LIBS) is an analytical technique that uses the focused energy of a pulsed laser as a sampling and excitation source for atomic emission spectroscopy (AES). LIBS has some distinct advantages over traditional AES methods: ability to analyze any phase of …
-
Laser induced breakdown spectroscopy of martian breccia Northwest Africa 7034: comparison with Mars Science Laboratory results
… Mars Science Laboratory (MSL) rover is utilizing laser-induced breakdown spectroscopy (LIBS) instrumentation to determine compositions of rocks shot in Gale crater, Mars, from a distance of 1.56-7 meters. At the same time, martian breccia meteorite Northwest Africa (NWA) 7034 was analyzed with the …
-
Determining Elemental Concentrations of Nickel-Doped Iron Samples through the Method of Laser Induced Breakdown Spectroscopy
… material is oftentimes of the utmost importance. Laser induced breakdown spectroscopy (LIBS) is a method for determining compositional information of materials with minimal to no sample preparation and with limited destructiveness. In this work, an optical path configuration for achieving ablation …
-
Development of nanosecond-gated laser induced breakdown spectroscopy for fuel mole fraction measurements in supersonic combustion
… as well as high temperatures from combustion. Laser-induced breakdown spectroscopy (LIBS) is a measurement technique utilizing the emissions from a plasma-generated from a focused laser pulse to determine quantitative parameters of the medium, specifically atomic composition and number density. …
-
Feasibility study of micro-laser induced breakdown spectroscopy applied to lead identification in metal alloys and environmental matrices
… policy and regulation. A novel, rapid, micro-Laser Induced Breakdown Spectroscopy ([mu]LIBS) technique for inorganic identification has been explored in metals, metal alloys, soil and paint pellets. This study employed a passively Q-switched infrared Microchip laser, in conjunction with a …
-
Analyzing geological materials under martian conditions using laser-induced breakdown spectroscopy : plasma fundamentals, sample classification, and trace element quanitification
Laser-induced breakdown spectroscopy (LIBS) is an emission spectroscopy analysis technique that continues to be developed for the study of solids, liquids and gases. Geological applications for LIBS are a particularly exciting area of research, in part due to the capabilities of the technique to …
-
Laboratory evaluation of laser-induced breakdown spectroscopy (LIBS) as a new in situ chemical sensing technique for the deep ocean
… environment is becoming increasingly important. Laser-induced breakdown spectroscopy (LIBS) possesses many of the characteristics required for such in situ chemical sensing, and is a promising technique for field measurements in extreme environments. Although many LIBS researchers have focused …
-
Laboratory evaluation of laser-induced breakdown spectroscopy (LIBS) as a new in situ chemical sensing technique for the deep ocean
… environment is becoming increasingly important. Laser-induced breakdown spectroscopy (LIBS) possesses many of the characteristics required for such in situ chemical sensing, and is a promising technique for field measurements in extreme environments. Although many LIBS researchers have focused …
-
Oscillator strength measurements in singly-ionized, doubly-ionized and neutral lanthanides and transition elements (sm, nd, pr, gd, cu, and fe) using laser-induced breakdown spectroscopy.
… these limiting issues. In this dissertation, laser-induced breakdown spectroscopy (LIBS) has been employed for the first time on a large scale as a spectroscopic technique for the rapid and convenient production of atomic and ionic plasmas as sources of atomic emission in order to determine …
Page 1 of 2