Download or read book High Power Millimeter Wavelength Coherent Radiation Sources written by John E. Walsh and published by . This book was released on 1986 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of the results of the Cerenkov Maser development is presented. During the course of this work, operation over the spectral range extending from just below 30 GHz to just above 300 GHz was demonstrated. Sources based upon high-power microwave-tube technology and sources driven by pulse-power generators were both used to drive Cerenkov Masers. In the former type, 10% efficiency from single-pass, untapered resonators were obtained, while in the latter, efficiency was in the 0.1-1% range. Extensive computer codes describing linear and nonlinear aspects of Cerenkov Master operation were also developed.
Download or read book Coherent Tunable Thz FIR Radiation Sources written by and published by . This book was released on 1999 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: As described by the title the grant funds were used to support a project whose primary goal was the development of tunable coherent sources for the THz-FIR region of the spectrum. The THz or more generally the FIR extends from 0.3 x 10(exp 12) (0.3THz) to 30 x 10(exp 12) (30THz) or alternatively from a wavelength of 1 mm down to a wavelength of 10 gm. It is a range of the spectrum that has been a long standing challenge. Microwave technology which has been extraordinarily successful at wavelengths longer than 1 mm and classical and quantum optical techniques which are extremely effective in the visible, near and mid infrared regions of the spectrum encounter fundamental challenges when extended (respectively) to longer or shorter wavelengths. Continued interest in "opening up" and exploiting the FIR region of the spectrum is based on the scientific questions which in part demand an access to the THz-FIR spectral range. These extend from atmospheric and biophysics to plasma physics and radio astronomy. Important technological applications also exist. Among the examples would be radar modeling, characterization of the response of near millimeter wave (NMMW) systems and the potential for short range high resolution radar. The immediate scientific and engineering goals of the project supported by the equipment grant provide a source that is tunable, narrow band and provides sufficient power for spectroscopic investigations. In the longer term a compact conveniently packaged sources and potential and requirements needed to reach higher power operation are of interest. The grating couples the beam with the electromagnetic field provides distributed feedback which reacts back on the beam and in turn leads to bunching of the beam. The density bunches produce the coherent operation.
Download or read book New High Power Coherent Radiation Sources written by P. Sprangle and published by . This book was released on 1984 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, there has been considerable renewed interest in the development of novel devices for the production of high power coherent electromagnetic radiation. This interest has been motivated largely by the realization that, with existing technology, certain processes utilizing relativistic electron beams can produce coherent electromagnetic radiation at power levels far in excess of those achieved by conventional electron devices. This paper will review the current status of this rapidly developing field, with emphasis on two generic devices. The major thrust in the recent development of electron beam driven radiation sources has been directed towards achieving shorter wavelengths, greater power and higher efficiencies. Shortly after the development of such successful sources as the magnetron, kylstron and various traveling wave devices, it became clear that, in their original form, they were limited in their ability to produce high levels of radiation efficiently at short wavelengths. To circumvent the inherent limitations of these conventional coherent radiation sources, many new concepts and mechanisms, as well as variations on conventional concepts, were proposed. This paper is concerned primarily with two devices which are, relatively speaking, newcomers to the list of coherent classical radiation sources. They are the free electron laser and the cyclotron resonance maser (CRM); one well known type of CRM is the gyrotron.
Download or read book Infrared and Millimeter Waves V13 written by Kenneth J. Button and published by Elsevier. This book was released on 1985-11-28 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared and Millimeter Waves, Volume 13: Millimeter Components and Techniques, Part IV compiles the work of several authors while focusing on certain aspects of infrared and millimeter waves, such as sources of radiation, instrumentation, and millimeter systems. This volume covers millimeter components and techniques. This text first covers the use of powerful gyrotrons for thermonuclear research, and then discusses high-power coherent radiation sources. Kinetic theory of harmonic gyrotron oscillator with slotted resonant structure is the focus of Chapter 3, while integrated fin-line components for communication, radar, and radiometer applications is the subject of Chapter 4. The fifth chapter discusses propagation and mode coupling in corrugated and smooth-wall circular waveguides. Chapter 6 discusses far-infrared properties of inhomogeneous materials, and the last chapter covers solid-state spectroscopy with far-infrared continuous-wave lasers. This book will be of great use to researchers or professionals whose work involves infrared and millimeter waves.
Download or read book Coherent Radiation Sources written by A.W. Saenz and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Energetic electromagnetic radiation finds frequent uses in science (e. g. , for expe riments in nuclear and elementary - particle physics), in technology (for materials testing), and in medicine (for medical X-rays). The most common method of genera ting such radiation is via the process of "bremsstrahlung" (a German term coined by A. Sommerfeld, meaning "braking radiation") in which a beam of electrons is direc ted into matter (e. g. , a metal target), losing energy during its collisions with the atoms and releasing this energy in the form of emitted radiation. The character of such radiation may be drastically changed by the use of a tar get with periodic structure (most commonly, a crystal target). The coherent waves emitted from individual crystal atoms interfere with each other, monochromatizing and polarizing the radiation and often increasing its intensity manifold, thereby creating a powerful radiation source of high quality for purposes of scientific and technical applications. This is true both for the well - established "coherent bremsstrahlung" process in which the interfering radiation is emitted while the electrons cross a succession of crystal planes, as well as for the more recently discovered process of "channeling radiation" (generating radiation of even higher intensity, but lower energy) in which the radiation is emitted while the electrons propagate along a crystal plane, or a crystal axis, in an oscillatory fashion.
Download or read book Gyrotrons written by Machavaram V. Kartikeyan and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing on the author's wide experience, this book gives a comprehensive review of the state of the art in gyrotron technology, covering the theory, design and applications. The book includes an extensive references list which provides an excellent guide to the related literature.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sources of radiation written by Kenneth J. Button and published by . This book was released on 1979 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coherent Radiation Sources written by A.W. Saenz and published by Springer. This book was released on 2013-01-21 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Energetic electromagnetic radiation finds frequent uses in science (e. g. , for expe riments in nuclear and elementary - particle physics), in technology (for materials testing), and in medicine (for medical X-rays). The most common method of genera ting such radiation is via the process of "bremsstrahlung" (a German term coined by A. Sommerfeld, meaning "braking radiation") in which a beam of electrons is direc ted into matter (e. g. , a metal target), losing energy during its collisions with the atoms and releasing this energy in the form of emitted radiation. The character of such radiation may be drastically changed by the use of a tar get with periodic structure (most commonly, a crystal target). The coherent waves emitted from individual crystal atoms interfere with each other, monochromatizing and polarizing the radiation and often increasing its intensity manifold, thereby creating a powerful radiation source of high quality for purposes of scientific and technical applications. This is true both for the well - established "coherent bremsstrahlung" process in which the interfering radiation is emitted while the electrons cross a succession of crystal planes, as well as for the more recently discovered process of "channeling radiation" (generating radiation of even higher intensity, but lower energy) in which the radiation is emitted while the electrons propagate along a crystal plane, or a crystal axis, in an oscillatory fashion.
Download or read book Generation of Tunable Coherent Radiation in the Millimeter and Submillimeter Range for Use as Sources and Detectors written by Lutz Leopold and published by . This book was released on 1974 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transmission characteristics of thin Al films (about 200A) for 100 GHz radiation was measured. The superconducting films were put into various non-equilibrium states by illuminating them with an Ar laser where power was changed from zero to 500 MW. The conclusion of the work is that the films are not heated in agreement with previous results. (Author).
Download or read book High power Particle Beams Beams 90 Proceedings Of The 8th International Conference In 2 Volumes written by B N Breizman and published by World Scientific. This book was released on 1990-12-28 with total page 1406 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Conference Proceedings include 11 invited papers and about 200 contributed papers on various scientific and technological aspects of high-power particle beams. The following subject areas are covered: Physics and Technology of High-Power Particle Beams, New Developments in Pulsed-Power Technology and High-Power Accelerators, Diagnostics in High-Power Particle Beam Experiments, High-Power Particle Beam Interactions with Matter, High-Power Particle Beams in Fusion Research, High-Density Z-Pinches, Laser Pumping and Microwave Generation by High-Power Particle Beams, Technical and Industrial Applications of Pulsed Power and High-Power Particle Beams.
Download or read book NRL Review written by and published by . This book was released on 1980 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulations of Physical and Engineering Processes written by Jan Awrejcewicz and published by BoD – Books on Demand. This book was released on 2011-09-26 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical Simulations of Physical and Engineering Process is an edited book divided into two parts. Part I devoted to Physical Processes contains 14 chapters, whereas Part II titled Engineering Processes has 13 contributions. The book handles the recent research devoted to numerical simulations of physical and engineering systems. It can be treated as a bridge linking various numerical approaches of two closely inter-related branches of science, i.e. physics and engineering. Since the numerical simulations play a key role in both theoretical and application oriented research, professional reference books are highly needed by pure research scientists, applied mathematicians, engineers as well post-graduate students. In other words, it is expected that the book will serve as an effective tool in training the mentioned groups of researchers and beyond.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-10 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book State of the Art of High Power Gyro Devices and Free Electron Masers Update 2016 KIT Scientific Reports 7735 written by Thumm, Manfred and published by KIT Scientific Publishing. This book was released on 2017-07-19 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical Foundations of the Millimeter and Submillimeter Waves Technique V 2 written by V. P. Ščestopalov and published by VSP. This book was released on 1997-08 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: The developments in physics, biology and astronomy, as well as radar and communication technology, remote sensing and spectroscopy have led to a sharp increase in the investigations of electromagnetic millimeter and submillimeter waves with the lengths 10--1 and 1--0.1 mm. These volumes reflect the results of extensive research in this field and attempt to destroy stereotypes established during the long years of large-scale modeling in the millimeter and submillimeter wavelength ranges and to develop new concepts. The first volume (Open Structures) deals with the results of theoretical and experimental studies of open electrodynamic structures (open waveguides, open resonators, diffractional gratings) allowing the determination of the characteristics of various devices used in millimeter and submillimeter technology. The second volume (Sources. Element Base. Radio Systems: Novel Scientific Trends) presents the problems of creating independent units and radiosystems of the millimeter and submillimeter wavelength ranges and the justification of their physical operating principles. This includes the mechanism of generating volume waves by electron flows moving close to a grating, excitation of fields in open resonators and waveguides with inclusion, and other phenomena.
Download or read book Lasers And Holography written by P C Mehta and published by World Scientific. This book was released on 1993-12-30 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a comprehensive book on the fundamental aspects of lasers and holography. It represents a self-contained treatment of the basic and state-of-the-art topics on the two subjects in a single volume. The book covers the latest technological and scientific developments and major advances that have taken place in the last decade and includes recent applications in medicine, information processing, interconnects and nondestructive testing.It is intended to fill the need of both researchers and graduate students for a single source book containing the necessary and relevant material in the areas of lasers and holography.
