Download or read book Optical Emission Spectroscopy Investigation of Microwave Plasmas written by Jayakumaran Sivagnaname and published by . This book was released on 1998 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigations in Microwave Plasma Emission Spectroscopy written by Peter Barrett and published by . This book was released on 1979 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microwave Induced Plasma Analytical Spectrometry written by Krzysztof J. Jankowski and published by Royal Society of Chemistry. This book was released on 2011 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the most comprehensive publication on MWP technology and MWP-OES analytical spectrometry with an emphasis on practical issues.

Download or read book Optical and Laser Spectroscopic Study of Microwave Plasma assisted Combustion written by Wei Wu and published by . This book was released on 2016 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonthermal plasma-assisted combustion (PAC) has been demonstrated to be a promising potential method to enhance combustion performance and reduce the pollutant emissions. To better understand the mechanism in PAC, we have conducted a series of studies on the combustion enhancement by plasma using a home-developed PAC platform which employs a nonthermal microwave argon plasma and a suit of optical diagnostic tools including optical imaging, optical emission spectroscopy, and cavity ringdown spectroscopy. A new PAC system in which a continuous atmospheric argon microwave plasma jet is employed to enhance combustion of methane/air mixtures was reported. Reactive species in PAC were characterized in a state-resolved manner including the simultaneously measurements of OH(A) and OH(X) radicals in the PAC flames. Roles of the state-resolved OH(A) and OH(X) radicals in microwave PAC of premixed methane/air mixture were explored. It was concluded that if both OH(A) and OH(X) radicals assisted the ignition and flame stabilization processes, then we may hypothesize that the role of OH(A) was more dominant in the ignition enhancement but the role of OH(X) was more dominant in the flame stabilization. The effect of fuel injection configurations was investigated in the comparative study between PAC of the premixed and nonpremixed methane/air mixtures. It was found that emissions from the CH (A-X) and C2 Swan systems only exist in the nonpremixed PAC which suggest that the reaction pathways are different between premixed and nonpremixed PAC. The PAC of premixed methane/oxygen/argon mixtures was investigated. A Ushaped dual-layer curve of fuel ignition/flame stabilization limit showing the effects of the plasma power on the fuel ignition and flame stabilization was observed and reported. A parametric study of the microwave PAC of the premixed ethylene/air mixtures was conducted. Behavior of the OH, CH, and C2 radicals and their dependence on plasma power, argon flow rate, and total ethylene/air mixture flow rate were also studied.

Download or read book Plasma Spectroscopy written by Evgeniĭ Aleksandrovich Oks and published by Springer. This book was released on 1995 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma Spectroscopy develops the foundation of spectroscopy for plasmas containing quasi-monochromatic electric fields in the microwaves or optical range. This topic is of major importance for plasma spectroscopy and the diagnostic of technological microwave and radiofrequency discharges, plasma lasers of microwave, optical, and x-ray ranges, pulsed discharges employed as advanced radiation sources, magnetic and laser fusion, and ionospheric and astrophysical plasmas. This monograph presents novel nonlinear-optical methods for theoretical analysis of radiation of quantum systems in media, describes principles for measuring the field and plasma parameters, and discusses their practical applications.

Download or read book Optical Emission Spectroscopy of Oxygen Microwave Plasma for Oxide Thin Film Growth Application written by Diala Ali Haidar Ahmad and published by . This book was released on 2008 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this thesis was to characterize the oxygen plasma generated by a 2.45 GHz microwave source that is being used for oxide thin film growth. The analysi s was conducted by optical emission spectroscopy in order to measure the product ion of dissociated oxygen atoms and the vibrational temperature of the O2 + ions in pure O2 plasma as well as in He-O2, Ne-O2, and Ar-O2 gas mixtures. A paramet ric study as a function of operating parameters, microwave power, gas pressure a nd gas mixtures (with rare gases like He, Ne, and Ar) was conducted in order to get insights on the atomic oxygen production. The evolution of the ratio of the emission line intensity of oxygen and the actinometer, argon was investigated in such systems by monitoring the 750 nm Ar line and the 777 nm O line in pure O2, He-O2, and Ne-O2 plasmas. As for Ar-O2 mixtures, the 706.5 nm He I line was use d instead of the 750 nm Ar line. The results revealed that atomic oxygen production increased in pure O2 plasma w ith increasing the microwave power from 200 to 400 W, and decreased as the gas p ressure was increased from 10 to 100 mTorr. On the other hand, the vibrational t emperature of O2 + was unaffected by the discharge power but it decreased as the pressure was raised from 10 to 100 mTorr. Moreover, the generation of atomic oxygen in the plasma increased by dilution of oxygen gas with helium and neon, particularly at dilution rates exceeding 60%. This effect was most marked at higher pressure (100 mTorr) with little correlati on with the evolution of the vibrational temperature under these conditions. The evolution of the O-atom generation with Ar dilution was significantly different from the case with Ne or He. It is found that the plasma becomes "Ar dominated" at a dilution of 20% only. These effects were discussed in view of Penning ionization mechanisms and change s in the electron density and electron temperature of the plasma, as operating p arameters are varied. The results can explain previously detected effects relate d to oxide film growth and could prove to be useful to perform film growth exper iments using rare gas-O2 plasmas.

Download or read book Fundamental Studies and Applications in Microwave induced Plasma Optical Emission Spectrometry written by Charles Bryson Williams (III) and published by . This book was released on 2019 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave-induced plasma optical emission spectrometry (MIP OES) is a technique within Atomic Spectrometry which is rapidly growing, following the relatively recent introduction of a complete commercial instrument based on the Hammer-cavity MIP. It offers advantages of low cost and simple operation, as well as the ability to run on air, enabling it to be used in remote areas or places with underdeveloped infrastructure. Due to the relative novelty of the technique, intensive method development for specific sample types is necessary to expand the utility of the technique and compensate for some of its limitations, such as its relatively low robustness and sequential detection. In addition, developments in plasma diagnostics and novel calibration strategies are also important to help increase the prominence and utility of the technique. The present research covers several such applications and efforts to improve instrumentation performance, as well as more fundamental studies of the properties of the plasma. In the first project, a method was developed to determine concentrations of Ca, K, and Na in various soft drinks. Addition and recovery experiments were used to evaluate the accuracy of the method. This study shows the ability of the technique to withstand relatively complex matrices, with no sample preparation other than simple dilution, and produce accurate results with traditional calibration methods. The second project involved development of a rapid dry-ashing technique to prepare samples for analysis using MIP. Calcium, Fe, K, Mg, Na and Zn were determined in complex-matrix samples such as tomato leaves, cheese, butter, peanut butter, infant formula and biodiesel samples. General agreement was also found between MIP OES results from samples decomposed either by the dry-ashing method or by a conventional microwave-assisted digestion procedure, and accurate results were found when applying the new, simpler method in certified reference material analyses. In the third project, several molecular species, naturally occurring in the plasma, were evaluated for their use as a plasma diagnostic tool. The N2+ / OH emission intensity ratio was evaluated for identifying the best instrumental operating conditions in MIP OES. Aluminum, Ba, Mn, Sr and Zn (analytes), and high concentrations of C, Na, Ca, HNO3 and HCl (sample matrices) were used as models to investigate the effects of complex matrices on analyte recoveries. The N2+ / OH signal ratio was more sensitive to changes in plasma conditions than the traditionally-used Mg II / Mg I ratio. Some other advantages include real-time monitoring capabilities, and the possibility of independently tracking variations in both plasma and sample introduction. Significant improvements in accuracy were achieved by employing the analyte-to-molecular species signal ratio, or their product, for calibration. In the final project, a novel calibration method, multi-flow calibration (MFC), was proposed. This strategy involves the use of multiple nebulization gas flow rates in the analysis to mitigate error caused by employing suboptimal sample introduction conditions, and to eliminate the need for optimization of conditions. The new calibration method was applied to the determination of Cr, Cu, Fe, and Mn in water and food samples. Addition recovery experiments and certified reference materials were used to validate the method. Multi-flow calibration presents comparable or superior accuracy to the traditional external standard calibration (EC), and offers simpler sample preparation than EC, requiring only a single standard and no modification of the sample introduction equipment.

Download or read book Investigation of Microwave Cavity Applicators for Plasma Assisted CVD Diamond Synthesis and Plasma Assisted Combustion written by Kadek Wardika Hemawan and published by . This book was released on 2010 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction to Inductively Coupled Plasma Atomic Emission Spectrometry written by G.L. Moore and published by Elsevier. This book was released on 2012-12-02 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, atomic emission spectroscopy is a well-established analytical technique of widespread application - a technique that no-one involved or interested in chemical analysis can afford to ignore. The present book was written to meet the need for an extensive introduction to this technique. It is written in an easy-to-understand way, and is mainly aimed at tertiary-level students at universities and colleges, and at newcomers to the field.The book prepares the reader for the study of more advanced texts and the increasing number of research papers published in this area. It will not only be of great use to the analytical chemist, but will appeal to specialists in other fields of chemistry who need an understanding of analytical techniques. The book introduces the analytical techniques of atomic emission spectroscopy, outlining the principles, history and applications. It discusses spectrography, excitation sources, inductively coupled plasmas, instrumentation, nebulization, sample dissolution and introduction, accuracy and precision, internal standardization, plasma optimization, line selection and interferences, and inductively coupled plasma mass spectroscopy. Understanding of the material is aided by 128 illustrations, including 11 photographs. References follow each chapter, and an extensive index completes this useful work.

Download or read book Studies on the Development and Characterization of a Microwave Induced Plasma for Optical Emission Spectrometry microform written by Bollo-Kamara, Arthur and published by National Library of Canada. This book was released on 1982 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Microwave induced Plasma Emission Spectroscopy MIPES to the Study of Gas solid Reactions written by Atilla Mehmet Oner and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Emission Spectral Analysis with High frequency and Microwave Induced Plasma Sources written by José Alfons Clement Broekaert and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Miniature Microwave Plasmas of Hydrogen and Argon Investigated Using Optical Emission Spectrosopy written by David Todd Story and published by . This book was released on 2006 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Emission Spectroscopy and Effects of Plasma in High Power Microwave Pulse Shortening Experiments written by William Erwin Cohen and published by . This book was released on 2000 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plasma Chemistry written by Alexander Fridman and published by Cambridge University Press. This book was released on 2008-05-05 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a fundamental introduction to all aspects of modern plasma chemistry, this book describes mechanisms and kinetics of chemical processes in plasma, plasma statistics, thermodynamics, fluid mechanics and electrodynamics, as well as all major electric discharges applied in plasma chemistry. Fridman considers most of the major applications of plasma chemistry, from electronics to thermal coatings, from treatment of polymers to fuel conversion and hydrogen production and from plasma metallurgy to plasma medicine. It is helpful to engineers, scientists and students interested in plasma physics, plasma chemistry, plasma engineering and combustion, as well as chemical physics, lasers, energy systems and environmental control. The book contains an extensive database on plasma kinetics and thermodynamics and numerical formulas for practical calculations related to specific plasma-chemical processes and applications. Problems and concept questions are provided, helpful in courses related to plasma, lasers, combustion, chemical kinetics, statistics and thermodynamics, and high-temperature and high-energy fluid mechanics.

Download or read book Microwave Assisted Sample Preparation for Trace Element Determination written by Erico Marlon Moraes Flores and published by Elsevier. This book was released on 2020-12-28 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave-Assisted Sample Preparation for Trace Element Analysis, Second Edition, describes the principles, equipment, and applications involved in sample preparation with microwaves for detecting and analyzing trace elements. Hot topics such as sample preparation for speciation, metabolomics, and halogen determination, as well as the alternatives of sample preparation for special samples (for example, carbon nanotubes, polymers, petroleum products), are also discussed. This completely updated second edition covers all the new devices and more powerful systems that have emerged in the last several years, such as Ultrawave and Ultraclave systems. New challenges in the fields of geology, environmental and biological studies -for example, the need for further determination of rare earth elements and halogens - are currently only covered in scientific journals and not in a comprehensive way. This book offers a summary of the state-of-the-art ways to meet these challenges with microwave-assisted sample preparation. The only book to cover in depth the principles, equipment, and applications of microwave-assisted sample preparation Written by experts in the field who provide a comprehensive overview of the important concepts Introduces the latest devices and systems used for in microwave-assisted techniques, including Ultrawave and Ultraclave systems

Download or read book Low Pressure Synthetic Diamond written by Bernhard Dischler and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive presentation of the complete spectrum of methods for CVD-diamond deposition and an overview of the most important applications.