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Author: MARIANNE.. COCHE
Publisher:
ISBN:
Category :
Languages : fr
Pages : 144
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Book Description
RAPPEL DES DIFFERENTES TECHNIQUES D'ANALYSE UTILISANT UNE ABLATION LASER SOUS VIDE COUPLEE A UNE DETECTION OPTIQUE OU ELECTRIQUE. EXPOSEE DES DONNEES ESSENTIELLES DE L'INTERACTION LASER-MATIERE REGISSANT LA CREATION DU PLASMA ET LA DETERMINATION DE SES PARAMETRES. LE CHOIX D'UNE DETECTION ELECTRIQUE, PERFORMANTE DANS UN PLASMA CONTINU A PRESSION ATMOSPHERIQUE, PERMET D'ETUDIER PAR ANALOGIE LE PLASMA TRANSITOIRE CREE PAR LASER. RESULTATS EXPERIMENTAUX ET INTERPRETATION
Author: MARIANNE.. COCHE
Publisher:
ISBN:
Category :
Languages : fr
Pages : 144
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Book Description
RAPPEL DES DIFFERENTES TECHNIQUES D'ANALYSE UTILISANT UNE ABLATION LASER SOUS VIDE COUPLEE A UNE DETECTION OPTIQUE OU ELECTRIQUE. EXPOSEE DES DONNEES ESSENTIELLES DE L'INTERACTION LASER-MATIERE REGISSANT LA CREATION DU PLASMA ET LA DETERMINATION DE SES PARAMETRES. LE CHOIX D'UNE DETECTION ELECTRIQUE, PERFORMANTE DANS UN PLASMA CONTINU A PRESSION ATMOSPHERIQUE, PERMET D'ETUDIER PAR ANALOGIE LE PLASMA TRANSITOIRE CREE PAR LASER. RESULTATS EXPERIMENTAUX ET INTERPRETATION
Author: Anton Nikiforov
Publisher: BoD – Books on Demand
ISBN: 1838802495
Category : Science
Languages : en
Pages : 146
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Book Description
Plasma as the fourth state of matter is an ionized gas consisting of both negative and positive ions, electrons, neutral atoms, radicals, and photons. In the last few decades, atmospheric-pressure plasmas have started to attract increasing attention from both scientists and industry due to a variety of potential applications. Because of increasing interest in the topic, the focus of this book is on providing engineers and scientists with a fundamental understanding of the physical and chemical properties of different atmospheric-pressure plasmas via plasma diagnostic techniques and their applications. The book has been organized into two parts. Part I focuses on the latest achievements in advanced diagnostics of different atmospheric-pressure plasmas. Part II deals with applications of different atmospheric-pressure plasmas.
Author: XinPei Lu
Publisher: CRC Press
ISBN: 0429622872
Category : Science
Languages : en
Pages : 447
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Book Description
Nonequilibrium atmospheric pressure plasma jets (N-APPJs) generate plasma in open space rather than in a confined chamber and can be utilized for applications in medicine. This book provides a complete introduction to this fast-emerging field, from the fundamental physics, to experimental approaches, to plasma and reactive species diagnostics. It provides an overview of the development of a wide range of plasma jet devices and their fundamental mechanisms. The book concludes with a discussion of the exciting application of plasmas for cancer treatment. The book provides details on experimental methods including expert tips and caveats. covers novel devices driven by various power sources and the impact of operating conditions on concentrations and fluxes of the reactive species. discusses the latest advances including theory, modeling, and simulation approaches. gives an introduction, overview and details on state of the art diagnostics of small scale high gradient atmospheric pressure plasmas. covers the use of N-APPJs for cancer applications, including discussion of destruction of cancer cells, mechanisms of action, and selectivity studies. XinPei Lu is a Chair Professor in the School of Electrical and Electronic Engineering at Huazhong University of Science and Technology. Stephan Reuter is currently Visiting Professor at Université Paris-Saclay. In a recent Alexander von Humboldt research fellowship at Princeton University, he performed ultrafast laser spectroscopy on cold plasmas. Mounir Laroussi is Professor of Electrical and Computer Engineering and director of the Plasma Engineering and Medicine Institute at Old Dominion University. He is a Fellow of IEEE and recipient of an IEEE Merit Award. DaWei Liu is Professor in the School of Electrical and Electronic Engineering at Huazhong University of Science and Technology.
Author: Zhiqiang Chen
Publisher:
ISBN: 9781838802509
Category : Physics
Languages : en
Pages : 144
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Book Description
Plasma as the fourth state of matter is an ionized gas consisting of both negative and positive ions, electrons, neutral atoms, radicals, and photons. In the last few decades, atmospheric-pressure plasmas have started to attract increasing attention from both scientists and industry due to a variety of potential applications. Because of increasing interest in the topic, the focus of this book is on providing engineers and scientists with a fundamental understanding of the physical and chemical properties of different atmospheric-pressure plasmas via plasma diagnostic techniques and their applications. The book has been organized into two parts. Part I focuses on the latest achievements in advanced diagnostics of different atmospheric-pressure plasmas. Part II deals with applications of different atmospheric-pressure plasmas.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
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Book Description
The propagation of the laser-induced plasma formed by KrF irradiation of Y1Ba2Cu3O-- has been characterized in background pressures of oxygen and argon typically used for thin film growth. The ion current transmitted through the background gases was recorded along the normal to the irradiated pellet as a function of distance in order to measure the decreasing velocity and magnitude of the expanding plasma current due to collisional slowing and attenuation of the laser plume. The integrated ion charge delivered to a substrate at low pressures can be described by elastic scattering giving a general integral cross sections of [sigma]{sub e}(O2) = 3.2 × 10−16 cm2 and [sigma]{sub e}(Ar) = 2.7 × 10−16 cm2. At higher pressures, inelastic scattering leads to increased recombination and reactive conversion of ions indicated by increased fluorescence of all the species, which becomes dominated by fluorescence of YO and BaO. Spatially resolved fluorescence measurements indicate that the luminous boundary to the plasma follows a weak shock front which coincides with the ion flux propagation. The ion transmission is found to drop exponentially with distance and background pressure, in agreement with a simple scattering model which yields general scattering cross sections for ion-argon [sigma]{sub i-Ar} = 2.1 × 10−16 cm2 and ion-oxygen [sigma]{sub i-O{sub 2}} = 2.3 × 10−16 cm2 interactions in background pressures up to 300 mTorr. The general features of the plume deceleration are described in terms of a drag force model. 9 refs., 5 figs.
Author: I. Podgornyi
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 240
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Book Description
The present volume is essentially a qualitative survey of modern trends in the diagnostics of high-temperature plasmas, with particular orientation toward laboratory plasmas of interest in connection with research in controlled thermonuclear fusion. Among the broad topics considered are probe diagnostics, optical methods (including the use of lasers and holography), microwave diagnostics, and diagnostics with particle beams. Having infor mation on these methods available in compact form and in one place, as is the case in the present volume, should make it pos sible to evaluate different diagnostic approaches to specific prob lems. The volume will be useful as an introduction for advanced students making their first contact with experimental plasma physics and for physicists and engineers who are entering the field and desire a rapid survey of principles and modern trends in the diagnostics of high-temperature plasmas. v Foreword to the American Edition The material in this book is based on lectures given at Mos cow State University. It is intended to acquaint the reader with the basic aspects of plasma diagnostics and contains information re quired for the experimental physicist who wishes to carry out straightforward measurements of laboratory plasmas. It will be evident that in choosing the material we have been guided pri marily by the scientific interests of the author, and the great bulk of the material is based on work carried out in the USSR.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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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.
Author: Sylvain Roger René Iséni
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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