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Optical Diagnostics Of Colliding Laser Produced Plasmas
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Book Synopsis Optical Diagnostics of Colliding Laser Produced Plasmas by : Colm Fallon
Download or read book Optical Diagnostics of Colliding Laser Produced Plasmas written by Colm Fallon and published by . This book was released on 2013 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently prepulse techniques such as dual-pulse laser-induced breakdown spectroscopy (DP-LIBS) have emerged as commonly used analytical techniques for qualitative and quantitative elemental investigations in various research fields and disciplines such as industrial, defense and medical applications. The performance of the DP-LIBS technique is strongly dependent on the choice of the experimental conditions. The key parameters that affect its performance are the target properties, laser wavelength, pulse duration, energy and spot-size, interpulse delay times, delay time of observations, ambient background gas pressure and geometrical setup of the optics. The DP-LIBS approach provides significant enhancement in the intensities of emission lines and their lifetimes, up to two orders of magnitude greater than conventional single pulse laser induced breakdown spectroscopy. The aim of the work presented here is to further advance prepulse techniques, as well as other methods to control species density, with a view to optimise emission in the visible wavelength range. In particular, a new technique involving reheating the stagnation layer formed at the collision front between two (or more) colliding plasmas is explored. Spatially and temporally resolved imaging and spectroscopy of the interaction region between two colliding plasmas are employed to demonstrate for the first time that pumping of an optimised stagnation layer significantly increases the intensity emission and duration of selected spectral lines. This technique offers the promise of tunable density and tunable energy (temperature) plasmas. It will potentially increase both the lifetimes and intensities of spectral lines in laser produced plasmas by creating relatively low density - high energy plasmas which can overcome the problem of flux loss due to opacity, which leads to the attenuation of discrete emission lines with a concomitant reduction in line contrast, signal-to-noise ratio (SNR) and signal-to-background ratio (SBR). The latter is a key parameter in determining the limit-of-detection (LOD) of the LIBS technique. Other applications of stagnation layers include the development of 'target fuel' for Extreme UltraViolet (EUV) and X-ray light sources with an especial emphasis on generating high repetition rate, preheated droplet-like targets that can compete with the current liquid drop targets. The latter suffer from clogging at the jet nozzle due to adiabatic expansion freezing. Also, unlike stagnation layers the basic parameters of the droplet fuel cannot be easily varied in the way that stagnation layers allow.
Book Synopsis Laser, Optical and Electrical Diagnostics of Colliding Laser-produced Plasmas by : Pádraig Hough
Download or read book Laser, Optical and Electrical Diagnostics of Colliding Laser-produced Plasmas written by Pádraig Hough and published by . This book was released on 2010 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Diagnostics of Laser Plasmas by : Alice Delserieys
Download or read book Optical Diagnostics of Laser Plasmas written by Alice Delserieys and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Plasmas & Optical Diagnostics by : Magesh Thiyagarajan
Download or read book Laser Induced Plasmas & Optical Diagnostics written by Magesh Thiyagarajan and published by . This book was released on 2011-11 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Insight On Multifractal Dynamics Of Ns-laser Produced Plasmas by : Stefan Andrei Irimiciuc
Download or read book Insight On Multifractal Dynamics Of Ns-laser Produced Plasmas written by Stefan Andrei Irimiciuc and published by World Scientific. This book was released on 2023-08-22 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fourteen years after the first proposal of a fractal theoretical model to understand the dynamics of laser produced plasma, a complete image of the model is projected on a wide range of empirical data related to laser produced plasmas.The book tackles the two sides of laser produced plasmas with experimental data on a wide range of materials, from metallic alloys to geological samples and the associated mathematical model is developed in the multifractal theory of motion. A new perspective is explored in analyzing and interpreting the data collected by electrical or optical methods, focusing especially on the charged particles dynamics and the nature of fractal fluctuations and their influence during measurements as well as to the scattering process and plasma splitting phenomena, all seen through the lens of multifractal physics.The book offers the best presentation of the multifractal theoretical model for the study of transient phenomena in laser produced plasmas, which focus leads to a balanced development of the model showcasing both the flexibility and the unique vision of a multifractal mathematical apparatus.
Book Synopsis Optical and Laser Diagnostics by : C Arcoumanis
Download or read book Optical and Laser Diagnostics written by C Arcoumanis and published by CRC Press. This book was released on 2016-04-19 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the automotive industry to blood flow monitoring, optical techniques and laser diagnostics are becoming integral parts in engineering and medical instrumentation. Written by leading global experts from industry, academic groups, and laboratories, this volume provides an international perspective on both existing applications and leading-edge r
Book Synopsis Imaging and Spectroscopy of Laser-produced Colliding Plasmas by : Kevin D. Kavanagh
Download or read book Imaging and Spectroscopy of Laser-produced Colliding Plasmas written by Kevin D. Kavanagh and published by . This book was released on 2006 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Time-resolved Studies of Colliding Laser-produced Plasmas by : Domagoj Kos
Download or read book Time-resolved Studies of Colliding Laser-produced Plasmas written by Domagoj Kos and published by . This book was released on 2018 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical and Particle Diagnostics in Laser Produced Plasma by : Zahrah Ahmad
Download or read book Optical and Particle Diagnostics in Laser Produced Plasma written by Zahrah Ahmad and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Plasma Diagnostics by : Orlando Auciello
Download or read book Plasma Diagnostics written by Orlando Auciello and published by Academic Press. This book was released on 2013-10-22 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma Diagnostics, Volume 1: Discharge Parameters and Chemistry covers seven chapters on the important diagnostic techniques for plasmas and details their use in particular applications. The book discusses optical diagnostic techniques for low pressure plasmas and plasma processing; plasma diagnostics for electrical discharge light sources; as well as Langmuir probes. The text also describes the mass spectroscopy of plasmas, microwave diagnostics, paramagnetic resonance diagnostics, and diagnostics in thermal plasma processing. Electrical engineers, nuclear engineers, microwave engineers, chemists, and technical personnel in universities, industry, and national laboratories will find the book invaluable.
Book Synopsis Laser-Plasma Interactions 4 by : M.B Hooper
Download or read book Laser-Plasma Interactions 4 written by M.B Hooper and published by CRC Press. This book was released on 2020-11-26 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-Plasma Interactions 4 is the fourth book in a series devoted to the study of laser-plasma interactions. Subjects covered include laser light propagation, instabilities, compression and hydrodynamics, spectroscopy, diagnostics, computer code, dense plasmas, high-power lasers, X-UV sources and lasers, beat waves, and transport processes.
Book Synopsis Time-resolved Diagnostics of Excimer Laser-generated Ablation Plasmas Used for Pulsed Laser Deposition by :
Download or read book Time-resolved Diagnostics of Excimer Laser-generated Ablation Plasmas Used for Pulsed Laser Deposition written by and published by . This book was released on 1994 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characteristics of laser plasmas used for pulsed laser deposition (PLD) of thin films are examined with four in situ diagnostic techniques: Optical emission spectroscopy, optical absorption spectroscopy, ion probe studies, and gated ICCD (intensified charge-coupled-device array) fast photography. These four techniques are complementary and permit simultaneous views of the transport of ions, excited states, ground state neutrals and ions, and hot particulates following KrF laser ablation of YBCO, BN, graphite and Si in vacuum and background gases. The implementation and advantages of the four techniques are first described in order to introduce the key features of laser plasmas for pulsed laser deposition. Aspects of the interaction of the ablation plume with background gases (i.e., thermalization, attenuation, shock formation) and the collision of the plasma plume with the substrate heater are then summarized. The techniques of fast ICCD photography and gated photon counting are then applied to investigate the temperature, velocity, and spatial distribution of hot particles generated during KrF ablation of YBCO, BN, Si and graphite. Finally, key features of fast imaging of the laser ablation of graphite into high pressure rare gases are presented in order to elucidate internal reflected shocks within the plume, redeposition of material on a surface, and formation of hot nanoparticles within the plume.
Book Synopsis Research in Molecular Laser Plasmas by : N. G. Basov
Download or read book Research in Molecular Laser Plasmas written by N. G. Basov and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume reports investigations which form part of a major series of theoretical and experimental studies being carried out in the Laboratory of Low-Temperature Plasma Optics at the Lebedev Physics Institute in Moscow. The papers give the results of systematic investigations of the chemical composition and of the electrical and optical properties of discharge plasmas, and also of populations of laser levels. Reliable and detailed information is given on the dissociation of carbon dioxide gas in discharges; the nature of the velocity distribution function, average energies, and densities of electrons; and populations and vibrational temperatures of molecules in cw CO and CO lasers. The material in this volume is intended for specialists in quantum electronics and low temperature plasma diagnostics.
Book Synopsis Spectroscopic Diagnostics of Laser Produced Plasmas by : Norman David Delamater
Download or read book Spectroscopic Diagnostics of Laser Produced Plasmas written by Norman David Delamater and published by . This book was released on 1984 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interaction of Strong Laser Radiation with Solids and Nonlinear Optical Diagnostics of Surfaces by : Nikolaj Koroteev
Download or read book Interaction of Strong Laser Radiation with Solids and Nonlinear Optical Diagnostics of Surfaces written by Nikolaj Koroteev and published by Springer-Verlag. This book was released on 2013-11-21 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Imaging and Spectroscopy of Laser Produced Annular Plasmas by : Ben Delaney
Download or read book Imaging and Spectroscopy of Laser Produced Annular Plasmas written by Ben Delaney and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser induced breakdown spectroscopy (LIBS) has emerged as a commonly used analytical technique for both qualitative elemental identification and quantitative concentration determination in various academic and industrial fields. The ultimate performance of LIBS is dependent on the signal to background ratio (SBR) of the spectra which are acquired from a sample and is quantified as the limit of detection (LOD) of the technique. A significant body of work has already been reported in the literature aimed at lowering of the LOD of LIBS. This work includes investigations into the effects of; laser fluence, wavelength and pulse length as well as space and time optimization, along with double pulse plasma formation and reheating arrangements. The aim of the work presented here is to generate and investigate the stagnation layer formed in vacuo, at the centre of an annular plasma, and to employ it in a LIBS experiment on trace Cu in Al. This is achieved by retrofitting a single optical element, namely an axicon, to the focusing lens normally used for point plasma formation. Spatially and temporally resolved imaging and spectroscopy are employed to track the formation and evolution of a stagnation layer at the centre of an annular plasma. Comparisons of these imaging and spectroscopy measurements are drawn with those obtained for a stagnation layer formed between two point seed plasmas, as well as for single laser produced plasma. An off axis parabolic mirror was used to carry out imaging and spectroscopy along the plasma expansion axis, normal to the target. A simple relay lens system was used for imaging and spectroscopy parallel to the target surface. The former is, to the best of my knowledge, the first time such an investigation into stagnation layers has been undertaken. The targets used were slabs of aluminium with trace amounts of copper. Point, dual colliding and annular colliding plasmas were investigated to determine their relative merits in laser induced breakdown spectroscopy. It found that the limit-of-detection for trace amounts of Cu in Al is lowest for annular plasmas formed at low laser pulse energies of ca. 25 - 30 mJ.
