Download or read book Characterization of Expanding Laser Plasma Produced by Laser Ablation written by Antonella Lorusso and published by . This book was released on 2006 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Plasma Produced in Laser Ablation of Metal and Multicomponent Solid Targets written by Wang Xuan and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization and Control of Laser Ablation Plasmas for the Synthesis of New Materials and as Optical Nonlinear Media written by Ignacio López Quintás and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The work described in this thesis, entitled: “Characterization and control of laser ablation plasmas for the synthesis of new materials and as optical nonlinear media”, was carried out in the Lasers, nanostructures and materials processing group at the Institute of Physical Chemistry “Rocasolano” of the Spanish National Research Council, CSIC in Madrid. Laser ablation is a physical process taking place as a consequence of the interaction of a sufficiently intense laser beam with a material, usually referred as ablation target. The energy deposited by the laser is absorbed by the target, leading to a temperature increase, which in turn, depending on the laser intensity, can lead to events like bond breaking, melting and vaporization of the surface layers and ultimately to ejection of a small amount of material generating a laser ablation plasma. The induced plasma expands preferentially in the direction normal to the target surface in the form of a plasma plume. As a consequence of the ablation, the material undergoes a series of observable physical changes. Laser ablation is therefore an extremely complex process, depending both on the properties of the laser radiation and on the properties of the target material. For this reason, research aimed at studying the ablation mechanisms and to extend and improve its application in different fields of science and technology is of great interest. One of the main characteristics of laser ablation is its universality, as in principle, all materials can be ablated. This process allows the controlled removal of a small amount of material and to entrain in the gas phase species that otherwise would be difficult to obtain. All these characteristics make laser ablation a highly attractive process in fields such as materials processing and synthesis or chemical analysis among others...
Download or read book Plasma Production by Laser Ablation PPLA 2003 written by Santo Gammino and published by World Scientific. This book was released on 2004 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume concerns the latest results on pulsed plasma production by energetic laser pulses irradiating solid targets. The produced plasma emits neutrals, clusters, ions, electrons and photons. Plasma properties depend on the laser pulse duration, energy, wavelength, focusing, target nature and irradiation conditions. Plasma expands in vacuum with supersonic velocity and may accelerate heavy ions, with charge states higher than 50+, at energies higher than 10 MeV. This book presents and discusses possible applications, such as ion injection in ECR ion sources, ion implantation, ion post-acceleration and thin film deposition by the PLD technique. The proceedings have been selected for coverage in: . OCo Index to Scientific & Technical Proceedings- (ISTP- / ISI Proceedings). OCo Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings). OCo CC Proceedings OCo Engineering & Physical Sciences. Contents: Experiments on the Laser Injection to ECRIS (G Arzumanyan et al.); Pulsed Laser Deposition of Diamond-Like Carbon Films in Different Ambient Atmospheres (M Bonelli et al.); Pulsed Laser Deposition of Crystalline Silicon Carbide Films (R Reitano et al.); Microscopic Description of Energy Production (A Bonasera); Laser-Produced Ions for Various Applications (L Liska et al.); Diagnostics for Laser Ion Sources (J Krisa et al.); Temperature Measurements by MaxwellOCoBoltzmann Distribution of a Plasma-Laser and Characterization of the Ion Bean (V Nassisi et al.); Flexible Laser Ion Sources for Surface Modification (F P Boody et al.); Aluminium Laser Ablation for Plasma Production (A Piccioto et al.); The Role of Secondary Electron Emission on the ECR Plasma (L Schachter et al.); Multiple Ion Implantation Effects on Wear and Wet Ability of Polyethylene Based Polymers (L Torrisi et al.); and other papers. Readership: Graduate students, academics, researchers and industrialists in laser and plasma physics."
Download or read book Space and Time Characterization of Laser induced Plasmas for Applications in Chemical Analysis and Thin Film Deposition written by Mahmoud Dawood and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DEVELOPMENT CHARACTERIZATION written by 林家堅 and published by Open Dissertation Press. This book was released on 2017-01-27 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Development and Characterization of a New Laser Ablation Technique for Inductively Coupled Plasma-atomic Emission Spectrometry (ICP-AES)" by 林家堅, Kar-kin, Lam, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled DEVELOPMENT AND CHARACTERIZATION OF A NEW LASER ABLATION TECHNIQUE FOR INDUCTIVELY COUPLED PLASMA - ATOMIC EMISSION SPECTROMETRY (ICP-AES) submitted by LAMKARKIN for the degree of Master of Philosophy at The University of Hong Kong in March 1996 A novel laser sampling technique, back surface ablation, has been developed for inductively coupled plasma - atomic emission spectrometry (ICP-AES). Samples are coated onto a transparent substrate and a laser beam is irradiated onto the sample through the substrate instead of sampling directly from a sample surface. As part of the sample is vaporized by the laser beam, high pressure develops at the sample-substrate interface. The sample at the laser spot is explosively and completely removed by the expanding vapor. Sampling efficiency is up to 10 times higher than conventional "front surface" laser sampling. Also, stoichiometric sampling is ensured because of complete removal of the sample at the laser spot. The risk of inaccurate chemical analysis associated with non- stoichiometric thermal vaporization in front surface laser sampling is reduced. Two methods of calibration, standard additions and calibration with standards in poly(vinyl alcohol) matrix, were used for quantitative analysis of household paints usingfront surface and back surface ablation-ICP-AES. Internal standards are used to compensate for pulse-to-pulse laser energy fluctuation and sample thickness variation across a sample. Twelve elements of different thermal properties and concentration ranging from 1 ppm to 2000 ppm were analyzed and the elemental concentration was compared to that of microwave digestion/solution nebulization-ICP-AES. Back surface ablation appears to be more precise and accurate than conventional front surface ablation. DOI: 10.5353/th_b3025281 Subjects: Laser ablation Atomic emission spectroscopy
Download or read book Characteristics of Ultrafast Laser Produced Plasma and Its Application in Thin Film Deposition written by Zhiyu Zhang and published by . This book was released on 2003 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Ablation written by Tatiana Itina and published by BoD – Books on Demand. This book was released on 2017-12-21 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shortly after the demonstration of the first laser, the most intensely studied theoretical topics dealt with laser-matter interactions. Many experiments were undertaken to clarify the major ablation mechanisms. At the same time, numerous theoretical studies, both analytical and numerical, were proposed to describe these interactions. These studies paved the ways toward the development of numerous laser applications, ranging from laser micro- and nanomachining to material analysis, nanoparticle and nanostructure formation, thin-film deposition, etc. Recently, more and more promising novel fields of laser applications have appeared, including biomedicine, catalysis, photovoltaic cells, etc. This book intends to provide the reader with a comprehensive overview of the current state of the art in laser ablation, from its fundamental mechanisms to novel applications.
Download or read book Pulsed Laser Ablation of Solids written by Mihai Stafe and published by Springer Science & Business Media. This book was released on 2013-11-09 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book introduces ‘the state of the art' of pulsed laser ablation and its applications. It is based on recent theoretical and experimental studies. The book reaches from the basics to advanced topics of pulsed laser ablation. Theoretical and experimental fundamental phenomena involved in pulsed laser ablation are discussed with respect to material properties, laser wavelength, fluence and intensity regime of the light absorbed linearly or non-linearly in the target material. The energy absorbed by the electrons leads to atom/molecule excitation, ionization and/or direct chemical bond breaking and is also transferred to the lattice leading to material heating and phase transitions. Experimental non-invasive optical methods for analyzing these phenomena in real time are described. Theoretical models for pulsed laser ablation and phase transitions induced by laser beams and laser-vapour/plasma interaction during the plume expansion above the target are also presented. Calculations of the ablation speed and dimensions of the ablated micro- and nano-structures are performed. The validity and required refinement of different models in different experimental conditions is provided. The pulsed laser deposition process which bases on collecting the ablated particles on a surface is analyzed in terms of efficiency and quality of the deposited films as a function of ambient conditions, target material, laser parameters and substrate characteristics. The interaction between the incident laser and the ablation plasma is analyzed with respect to its influence on the structures of the deposited films and its capacity to generate high harmonics and single attosecond pulses which are highly desirable in pump-probe experiments.
Download or read book Handbook of Laser Induced Breakdown Spectroscopy written by David A. Cremers and published by John Wiley & Sons. This book was released on 2006-07-11 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Starting from fundamentals and moving through a thorough discussion of equipment, methods, and techniques, this text provides a unique reference source for this important new analysis method. The authors use a combination of tutorial discussions ranging from basic principles up to more advanced descriptions along with extensive figures and photographs to clearly explain topics addressed in the text. It is intended that the data tables will be located within the Education section of SpectroscopyNOW.com Provides a thorough but understandable discussion of the basic principles, instrumentation, methodology, and sampling procedures of the method based on atomic emission spectroscopy. Presents a discussion of the many advantages of the method along with limitations, to provide the reader a balanced overview of capabilities of the method Presents an overview of some real-world applications of the method Provides an up-to-date list of references to LIBS literature and a unique list of element detection limits using a uniform analysis method
Download or read book Laser Produced Plasmas in Liquid Environments written by Nichola Walsh and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the interaction of an intense laser pulse with a solid metal target, a high temperature, high density plasma is formed. Pulsed laser ablation has attracted much interest over the past fifty years with experimental and theoretical work largely focussed on the study of laser produced plasmas in vacuum. The study of pulsed laser ablation has been largely motivated from a materials processing perspective, with the characterisation of thin films using pulsed laser deposition of particular interest. Another application resulting from the study of laser produced plasmas is the use of laser-induced breakdown spectroscopy (LIBS) for elemental composition and quantitative analysis of samples. LIBS is now a widely used technique employed in various fields including environmental analysis, forensics and biomedical applications. While much work has been carried out on pulsed ablation of materials in vacuum and gas ambient, comparatively little research has been done on ablation in liquid media. As a result, the fundamental understanding of laser produced plasmas in liquids remains insufficient. Using techniques such as time resolved imaging and spectroscopy, a full characterisation of the plasma formed in air was undertaken as a comparison to the subsequent investigation of the plasma formed in water ambient. Single pulse studies revealed information on the dynamic evolution of a laser plasma formed in the liquid phase where strong confinement and broadband emission were the main observations. Shadowgraphy measurements were performed to examine the dynamic behaviour of the cavitation bubble that eventually forms post plasma ignition. The results of time resolved optical emission measurements from within the cavitation bubble using a second laser pulse reveal for the first time the full dynamic evolution of the plasma formed in such an environment.
Download or read book Practical Applications of Laser Ablation written by Dongfang Yang and published by BoD – Books on Demand. This book was released on 2021-07-14 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser ablation refers to the phenomenon in which an intense laser beam irradiates the surface of a solid to induce instant local removal of atoms by a thermal or non-thermal mechanism. Through eight chapters of original research studies and literature reviews written by experts from the international scientific community, this book presents theoretical and experimental aspects of the laser ablation phenomenon for processing material including pulsed laser deposition of thin films, laser surface modification, laser machining and laser nanoparticle formation. It also includes a study of the dynamics of plasmas generated by laser ablation of multi-component materials and an overview of laser-induced breakdown spectroscopy (LIBS) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) techniques for chemical analysis.
Download or read book Final Report written by Conference of Ministers of Education of European Member States and published by . This book was released on 1989 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Surface Processing and Characterization written by I.W. Boyd and published by Elsevier. This book was released on 1992-03-09 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contributions in this volume reflect not only the growing understanding of the underlying mechanisms controlling the various reactions in laser surface processing, but also the potential of several developing applications of direct processing. The most notable trend in the field currently is the technique of laser ablation, which is reported in almost a quarter of the papers in this volume. Whilst by no means a new phenomenon, attention has until recent years remained in the area of lithography and UV-sensitive materials. The growth in interest lies in the use of the technique to grow multi-component thin films and multi-layers. A number of papers on the topic of process diagnostics and in-situ measurements are also included. The theme of these annual meetings is centred around the physical and chemical modification of thin films and surfaces induced by the action of photon, ion, neutral, or electron beams in a variety of environments. Consequently these proceedings provide a comprehensive and unified presentation of the latest developments in this field.
Download or read book Temporal and Spatial Characteristics of Laser induced Plasma on Organic Materials and Quantitative Analysis of the Contained Inorganic Elements written by Wenqi Lei and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This PhD work was devoted to the understanding of the laser-induced plasma on organic materials and theapplication of laser-induced breakdown spectroscopy (LIBS) to quantitative analysis of these materials. Itcontributes to deepen our knowledge on the physical mechanisms involved in laser-matter interaction, plasmageneration, evolution and expansion of the plasma into the ambient gas, with emphasis on plasmas induced onorganic targets. It also intends to improve the performance of LIBS for the analysis of organic materials. Thespecificity for organic targets fits the current focus of the international community working on LIBS, toimprove the control of the plasma induced on this kind of material which has a distinguished optical prosperitywith respect to that of metals, better known for laser ablation. It addresses also the growing need to apply theLIBS technique to organic materials for different applications in the environmental, food, or biomedicaldomains. The works in this thesis were therefore presented in this thesis document according to the followingorganization.After the General Introduction which introduces the scientific and technological contexts, Chapter Irecalls the basic theoretical elements necessary to understand the phenomenon of plasma generation by laserablation, and its evolution in the background gas. Ablation of organic material is emphasized. Procedures andtechniques of diagnostics of laser-induced plasma were then presented with a focus on the transient andinhomogeneous nature of the expanding plasma. Chapter II focuses on the generation and the evolution of theplasma induced on the skin of a potato, a typical sample of agricultural product. The characteristics of plasmainduced on a soft and wet organic target, such as a fresh potato, was something unknown when the thesis workstarted. These characteristics provide the necessary basis for the quantitative analysis of the trace andultra-trace metallic elements in these samples. Following this characterization, semi-quantitative analyticalresults were extracted from LIBS spectra corresponding to potato skin. Chapter III is presented in thecontinuity of Chapter II for the application of LIBS to the quantitative analysis of organic materials. Acomparative study on the analytical results with LIBS and ICP-AES for milk powders allows an assessment ofthe performances of quantitative analysis by LIBS for organic materials, and a validation of the CF-LIBSprocedure that we have developed. Different from Chapters II and III where attention was paid to trace metalelements, Chapter IV studies the behavior of the major elements that make up the matrix of organic material,which are 4 known organic elements: H, C, O, N. During the decomposition of organic material by laserablation, these elements can be found in the form of molecular fragments, or recombined into molecularspecies. We then study in this Chapter the evolution of these species as a function of the laser ablationparameters, the laser wavelength in particular. The thesis document ends with a general conclusion andoutlooks.
Download or read book Analysis of Laser Produced Plasma written by B.E. Paton and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Characterization of a New Laser Ablation Technique for Inductively Coupled Plasma atomic Emission Spectrometry ICP AES written by Kar-kin Lam and published by . This book was released on 1996 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
