Download or read book Cavity Enhanced Magneto Optic Rotation for Measurement of HO 2 written by Michael Stichter and published by . This book was released on 2016 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of reduced emissions and increased efficiency in transportation has required investigation into advanced engine designs. Some of these advanced engines use charge reactivity to closely control the engine ignition and combustion process and thus the overall engine operation. Reactivity controlled operation requires models of the chemical kinetics at the low end of operating temperatures. The current models are lacking detail in the low and intermediate temperature region where hydroxyl (OH), hydroperoxy (HO2), and alkylperoxy (RO2) radicals play an important role in the oxidation chemistry. Measurement of these radicals is made difficult in combustion systems because of the strongly absorbing stable products of combustion, such as CO2 and H2O, which obscure the absorption features of HO2 and RO2. Therefore, there is a need for sensitive and selective diagnostics which can quantitatively measure these weakly absorbing small peroxy radicals in combustion systems. This work advances the development and application of a sensitive and selective laser diagnostic technique called Cavity Enhanced Magneto-Optic Rotation (CEMOR) for quantitative measurement of paramagnetic species, specifically HO2 radicals. CEMOR combines the sensitivity of cavity ringdown spectroscopy (CRDS) and the selectivity of magneto-optic rotation (MOR) spectroscopy. This work presents a novel design of CEMOR with a continuous wave laser source for measurement of HO2. The narrower bandwidth of continuous wave lasers offers increased spectroscopic resolution over the pulsed Nd:YAG/OPO laser used for previous CEMOR development. Continuous wave cavity ringdown spectroscopy (cw-CRDS) is integrated with MOR in order to make high resolution scans of HO2 in a flash photolysis cell. Modeling results of the magnetic field strength in studies of MOR and CEMOR with a slot burner using permanent magnets, and of CEMOR in a flash photolysis cell using a solenoid are presented. Magnetic field strength effect is shown to have a linear relationship with MOR signal and a mechanism for measurement of its effect on CEMOR signal is described. The objective of this dissertation is to demonstrate that CEMOR can be used to make measurements of HO2 by increasing its resolution through the incorporation of a continuous wave distributed feedback (DFB) diode laser. The intellectual merit of this work is found in the design of a novel laser spectroscopy technique which is capable of sensitive and selective detection of paramagnetic species. This initial work did not demonstrate successful application of continuous wave CEMOR to measurement of HO2, yet it provides a path forward for this goal in a flash photolysis cell and cool flame burner. The present work also provides a method which can easily be adapted to measurement of alkyl peroxy (RO2) radicals.
Download or read book Precision of Cavity enhanced Optical Rotation Measurements written by Joaquín Guimbao Gaspar and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The signal to noise ratio in atomic magnetometry is fundamentally limited by the optical depth of the atomic ensemble. During the last decade, different technics for optical depth enhancement has been developed by several groups, some of them involving the implementation of an optical cavity. This thesis evaluates the performance of such an implementation by the polarization read out noise analysis of an optical cavity with similar characteristics as the already implemented by other groups. We obtained an estimated value for the signal to noise ratio enhancement with a cavity of 814 Finesse, and we studied the behaviour of the different sources of polarization noise in this system.
Download or read book Development of a Sensitive and Selective Laser Diagnostic Technique for Measuring Paramagnetic Species written by Jamie Lee Lane and published by . This book was released on 2012 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advisor: N. P. Cernansky and David L. Miller.
Download or read book Technical Digest written by and published by . This book was released on 2002 with total page 928 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Summaries of Papers Presented at the Conference on Lasers and Electro optics written by and published by . This book was released on 2002 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optics Letters written by and published by . This book was released on 1994 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 998 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Engineering written by and published by . This book was released on 2000 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publishes papers reporting on research and development in optical science and engineering and the practical applications of known optical science, engineering, and technology.
Download or read book Photonic Crystals written by John D. Joannopoulos and published by Princeton University Press. This book was released on 2011-10-30 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since it was first published in 1995, Photonic Crystals has remained the definitive text for both undergraduates and researchers on photonic band-gap materials and their use in controlling the propagation of light. This newly expanded and revised edition covers the latest developments in the field, providing the most up-to-date, concise, and comprehensive book available on these novel materials and their applications. Starting from Maxwell's equations and Fourier analysis, the authors develop the theoretical tools of photonics using principles of linear algebra and symmetry, emphasizing analogies with traditional solid-state physics and quantum theory. They then investigate the unique phenomena that take place within photonic crystals at defect sites and surfaces, from one to three dimensions. This new edition includes entirely new chapters describing important hybrid structures that use band gaps or periodicity only in some directions: periodic waveguides, photonic-crystal slabs, and photonic-crystal fibers. The authors demonstrate how the capabilities of photonic crystals to localize light can be put to work in devices such as filters and splitters. A new appendix provides an overview of computational methods for electromagnetism. Existing chapters have been considerably updated and expanded to include many new three-dimensional photonic crystals, an extensive tutorial on device design using temporal coupled-mode theory, discussions of diffraction and refraction at crystal interfaces, and more. Richly illustrated and accessibly written, Photonic Crystals is an indispensable resource for students and researchers. Extensively revised and expanded Features improved graphics throughout Includes new chapters on photonic-crystal fibers and combined index-and band-gap-guiding Provides an introduction to coupled-mode theory as a powerful tool for device design Covers many new topics, including omnidirectional reflection, anomalous refraction and diffraction, computational photonics, and much more.
Download or read book Advances in Atomic and Molecular Physics written by David R. Bates and published by . This book was released on 1979 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Science Abstracts written by and published by . This book was released on 1963 with total page 2078 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1995 with total page 1576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1990 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Satellite Remote Sensing written by William Emery and published by Elsevier. This book was released on 2017-08-30 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Satellite Remote Sensing: Atmosphere, Ocean and Land Applications is the first reference book to cover ocean applications, atmospheric applications, and land applications of remote sensing. Applications of remote sensing data are finding increasing application in fields as diverse as wildlife ecology and coastal recreation management. The technology engages electromagnetic sensors to measure and monitor changes in the earth’s surface and atmosphere. The book opens with an introduction to the history of remote sensing, starting from when the phrase was first coined. It goes on to discuss the basic concepts of the various systems, including atmospheric and ocean, then closes with a detailed section on land applications. Due to the cross disciplinary nature of the authors’ experience and the content covered, this is a must have reference book for all practitioners and students requiring an introduction to the field of remote sensing. Provides study questions at the end of each chapter to aid learning Covers all satellite remote sensing technologies, allowing readers to use the text as instructional material Includes the most recent technologies and their applications, allowing the reader to stay up-to-date Delves into laser sensing (LIDAR) and commercial satellites (DigitalGlobe) Presents examples of specific satellite missions, including those in which new technology has been introduced
Download or read book High Sensitivity Magnetometers written by Asaf Grosz and published by Springer. This book was released on 2016-09-20 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers, for the first time, an overview of nearly all of the magnetic sensors that exist today. The book is offering the readers a thorough and comprehensive knowledge from basics to state-of-the-art and is therefore suitable for both beginners and experts. From the more common and popular AMR magnetometers and up to the recently developed NV center magnetometers, each chapter is describing a specific type of sensor and providing all the information that is necessary to understand the magnetometer behavior including theoretical background, noise model, materials, electronics, design and fabrication techniques, etc.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1968 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
