Download or read book Fast Neutron Imaging Systems written by and published by . This book was released on 2016 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exploring Fast Neutron Computed Tomography for Non destructive Evaluation of Additive Manufactured Parts written by Ibrahim Oksuz and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron imaging is one of the most powerful non-invasive investigation modalities that finds many applications in various fields such as nuclear industry, homeland security, battery research, and archeology. It provides information about the internal structures of an object as neutrons are absorbed and transmitted at different levels in the object in question. It is complementary to X-ray imaging due to the different interaction mechanisms of X-ray and neutrons with materials. Neutron imaging applications can employ neutrons with different energies. Fast (MeV) neutrons have some advantages such as causing less radioactive transmutation in samples and providing deeper penetration which allows for exploring thicker and denser samples. It also provides good contrast images of objects made of a mix of hydrogenous and metallic elements. With the advent of the CCD technology, new opportunities have become available to perform neutron radiography, which provides 2D images of objects, and tomography, which yields information about objects in 3D, more efficiently. Digital neutron radiography allows the collection and storage the information in a digital environment, which enables a better and quicker data analysis. However, performing neutron imaging requires a well-characterized neutron source and a proper neutron imager, especially if fast neutrons are utilized as their interaction cross sections with materials are relatively smaller. This work explores the advancement of the fast neutron radiograph and tomography. The work includes studies comprising characterizing neutron detectors for fast imaging application, characterizing a fast neutron beam facility, performing fast neutron tomography using various imaging phantoms, and investigating spatial resolution in a fast neutron imaging system. In one study, Polyvinyl Toluene (PVT) (C9H10) based plastic scintillators with different dimensions and flours were investigated in terms of their relative light outputs and spatial resolutions. Due to high hydrogen concentration, PVT scintillators would be a suitable candidate since fast neutrons deposit higher energy as they interact mainly via elastic scattering reactions. This study resulted that thicker scintillators yield higher light output due to a higher amount of scintillation materials whereas they performed worse in spatial resolution because of more neutrons and light scattering. Another study was related to characterizing the Ohio State University Research Reactor (OSURR)’ recently built fast neutron beam facility. Models of the beamline and beam stop were created, and Monte-Carlo simulations were performed to determine the neutron energy spectrum, neutron, and gamma-ray flux, and dose rate distributions. Various thermal neutron filters were investigated, and Cadmium ratios that they provide were experimentally determined. Gamma-ray content in the beam was obtained using Optically Stimulated Luminescence (OSL) dosimeters. Another study investigates fast neutron computed tomography (nCT) using custom-made multi-material complex objects. Total nCT data collection time was as low as 2 hours for some objects. Various materials were resolved in 3D reconstructed images of the objects. Low-Z materials comprising the objects were revealed while being shielded behind high-Z materials. The last study in this work is about the investigation of the possible effects on the system's spatial resolution in a fast neutron imaging system. Results showed that the thicker imaging objects deteriorate the spatial resolution due to the neutron scattering. Simulations provided that the neutron interaction kinematics in PVTs would also degrade the spatial resolution.
Download or read book Neutron Imaging written by Dinesh K. Aswal and published by Springer Nature. This book was released on 2022-04-12 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprehensively presents the concepts of neutron physics and imaging including neutron properties, neutron matter interaction, neutron imaging, comparison with X-ray and physics and design of neutron sources. It discusses how neutron imaging has gained importance as a powerful non-destructive technique to understand the internal structures of materials/engineered components in wide range of industries by increasing their applicability and efficiency. The book also covers the topics of neutron optics and detectors, basic principles of neutron radiography and tomography, related standards, safety, metrology and regulations in neutron imaging. The book presents applications of neutron imaging in the areas of aerospace industry, nuclear power and manufacturing industry, materials science and engineering, geomechanics, national security, biological, and medical domain. Given its scope, the book will be highly beneficial for postgraduate students, researchers and industry professionals working in the area of engineering and physics, especially non-destructive testing and non-destructive evaluation through neutron imaging.
Download or read book Neutron Imaging and Applications written by Ian S. Anderson and published by Springer Science & Business Media. This book was released on 2009-04-21 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron Imaging and Applications offers an introduction to the basics of neutron beam production in addition to the wide scope of techniques that enhance imaging application capabilities. An instructional overview of neutron sources, detectors, optics and spin-filters allows readers to delve more deeply into the discussions of radiography, tomography and prospective applications available in neutron holography techniques. A section devoted to current applications describes imaging single grains in polycrystalline materials, neutron imaging of geological materials and other materials science and engineering areas. Coverage of thermal neutron imaging of biological tissues, plant physiology, Homeland Security and contraband detection explore the future prospects of this cutting-edge research. Written by key experts in the field, researchers and engineers involved with imaging technologies will find Neutron Imaging and Applications a valuable reference.
Download or read book Recent Results in the Development of Fast Neutron Imaging Techniques written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We are continuing with the development of fast ((almost equal to) 12 MeV) neutron imaging techniques for use in NDE applications. Our goal is to develop a neutron imaging system capable of detecting sub-mm-scale cracks, cubic-mm-scale voids and other structural defects in heavily-shielded low-Z materials within thick sealed objects. The final system will be relatively compact (suitable for use in a small laboratory) and capable of acquiring both radiographic and full tomographic image sets. The design of a prototype imaging detector will be reviewed and results from several recent imaging experiments will be presented. The concurrent development of an intense, accelerator-driven neutron source suitable for use with the final production imaging system will also be discussed.
Download or read book Neutron Radiography written by John P. Barton and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Second World Conference, Paris, France, June 16-20, 1986
Download or read book Neutron Generators for Analytical Purposes written by International Atomic Energy Agency and published by IAEA Radiation Technology Repo. This book was released on 2012 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication addresses recent developments in neutron generator (NG) technology. It presents information on compact instruments with high neutron yield to be used for neutron activation analysis (NAA) and prompt gamma neutron activation analysis in combination with high count rate spectrometers. Traditional NGs have been shown to be effective for applications including borehole logging, homeland security, nuclear medicine and the on-line analysis of aluminium, coal and cement. Pulsed fast thermal neutron analysis, as well as tagged and timed neutron analysis, are additional techniques which can be applied using NG. Furthermore, NG can effectively be used for elemental analysis and is also effective for analysis of hidden materials by neutron radiography. Useful guidelines for developing NG based research laboratories are also provided in this publication.
Download or read book Neutron Radiography 3 written by Shigenori Fujine and published by Springer. This book was released on 1990-07-31 with total page 1046 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Third World Conference held in Osaka, Japan, May 14-18, 1989
Download or read book Remote Compositional Analysis written by Janice L. Bishop and published by Cambridge University Press. This book was released on 2019-11-28 with total page 655 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive overview of the spectroscopic, mineralogical, and geochemical techniques used in planetary remote sensing.
Download or read book Fast Neutron Data written by Herman Feshbach and published by . This book was released on 1950 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X Ray Imaging written by Harry E. Martz and published by CRC Press. This book was released on 2016-10-26 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: While books on the medical applications of x-ray imaging exist, there is not one currently available that focuses on industrial applications. Full of color images that show clear spectrometry and rich with applications, X-Ray Imaging fills the need for a comprehensive work on modern industrial x-ray imaging. It reviews the fundamental science of x-ray imaging and addresses equipment and system configuration. Useful to a broad range of radiation imaging practitioners, the book looks at the rapid development and deployment of digital x-ray imaging system.
Download or read book Modulation Transfer Function in Optical and Electro optical Systems written by Glenn D. Boreman and published by SPIE Press. This book was released on 2001 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This tutorial introduces the theory and applications of MTF, used to specify the image quality achieved by an imaging system. It covers basic linear systems theory and the relationship between impulse response, resolution, MTF, OTF, PTF, and CTF. Practical measurement and testing issues are discussed.
Download or read book Challenges for Coolants in Fast Neutron Spectrum Systems written by International Atomic Energy Agency and published by . This book was released on 2020-07-30 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication evaluates the different coolant options considered for nuclear applications with a fast neutron spectrum (i.e. fusion, fission and accelerators), compiles the latest information in the field and identifies research needs.
Download or read book A Large Format Imaging Optics System for Fast Neutron Radiography written by and published by . This book was released on 2007 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamental power couplers for superconducting accelerator applications like the ILC are complicated transmission line assemblies that must simultaneously accommodate demanding RF power, cryogenic, and cleanliness constraints. When these couplers are RF conditioned, the observed response is an aggregate of all the parts of the coupler and the specific features that dominate the conditioning response are hard to determine. To better understand and characterize RF conditioning phenomena toward improving performance and reducing conditioning time, a high-power coupler component test stand has been built at SLAC. Operating at 1.3 GHz, this test stand was designed to measure the conditioning behavior of select components of the TTFIII coupler independently, including outer-conductor bellows, tube transitions, copper plating, surface preparations, and cold window geometries and coatings. A description of the test stand, the measurement approach, and a summary of the results obtained so far are presented.
Download or read book Semiconductor Nanomaterials written by Challa S. S. R. Kumar and published by John Wiley & Sons. This book was released on 2010-04-05 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book series Nanomaterials for the Life Sciences, provides an in-depth overview of all nanomaterial types and their uses in the life sciences. Each volume is dedicated to a specific material class and covers fundamentals, synthesis and characterization strategies, structure-property relationships and biomedical applications. The series brings nanomaterials to the Life Scientists and life science to the Materials Scientists so that synergies are seen and developed to the fullest. Written by international experts of various facets of this exciting field of research, the series is aimed at scientists of the following disciplines: biology, chemistry, materials science, physics, bioengineering, and medicine, together with cell biology, biomedical engineering, pharmaceutical chemistry, and toxicology, both in academia and fundamental research as well as in pharmaceutical companies. VOLUME 6 - Semiconductor Nanomaterials
Download or read book A System for Fast Neutron Radiography written by and published by . This book was released on 1997 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A system has been designed and a neutron generator installed to perform fast neutron radiography. With this system, objects as small as a coin and as large as a 19 liter container have been radiographed. The neutron source is an MF Physics A-711 neutron generator which produces 3 x 10[sup 10] neutrons/second with an average energy of 14. 5 MeV. The radiography system uses x-ray scintillation screens and film in commercially available light-tight cassettes. The cassettes have been modified to include a thin sheet of plastic to produce protons from the neutron beam through elastic scattering from hydrogen and other low Z materials in the plastic. For film densities from 1.8 to 3.0, exposures range from 1.9 x 10[sup 7] n/cm[sup 2] to 3.8 x 10[sup 8] n/cm[sup 2] depending on the type of screen and film. The optimum source-to-film distance was found to be 150 cm. At this distance, the geometric unsharpness was determined to be approximately 2.2-2.3 mm and the smallest hole that could be resolved in a 1.25 cm thick sample had a diameter of 0.079 cm.
Download or read book Neutron Radiography Handbook written by Peter von der Hardt and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiography with neutrons can yield important information not obtainable by more traditional methods. In contrast to X-rays as the major tool of visual non-destructive testing, neutrons can be attenuated by light materials like water, hydrocarbons, boron, penetrate through heavy materials like steel, lead, uranium, distinguish between different isotopes of certain elements, supply high quality radiographs of highly radioactive components. These advantages have led to multiple applications of neutron radiography since 1955, both for non-nuclear and nuclear problems of quality assurance. The required neutron beams originate from radioisotopic sources, accelerator targets, or research reactors. Energy "tailoring" which strongly influences the interaction with certain materials adds to the versatility of the method. Since about 1970 norms and standards have been introduced and reviewed both in Europe (Birmingham, September 1973) and the United States (Gaithersburg, February 1975). The first world conference on neutron radiography will take place in December 1981, in San Diego, U.S.A. . In Europe the interested laboratories inside the European Community have entered into systematic collaboration through the Neutron Radiography Working Group (NRWGl. since May 1979. This Handbook has been compiled as one of the common tasks undertaken by the Group. Its principal authors are J.C. Domanus (Ris0 National Laboratory). and R.S. Matfield (Joint Research Centre, Ispra) Major contributions have been received from R. Liesenborgs (SCK/CEN Mol) R. Barbalat (CEN Saclayl.
