Download or read book An Accelerator based Neutron Imaging System and Its Application to Detection of Corrosion in Aircraft written by Shuanghe Shi and published by . This book was released on 1995 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Practical Applications of Neutron Radiography and Gaging written by Symposium on Practical Applications of Neutron Radiography and Gaging and published by ASTM International. This book was released on 1976 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by Carl-Otto Fischer and published by Dgzfp. This book was released on 1997 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron Radiographic Nondestructive Evaluation of Aerospace Structures written by WE. Dance and published by . This book was released on 1976 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron radiography with source intensities which are moderate relative to those of reactor neutron sources was found to be effective for non-destructive inspection of a variety of aerospace structures. By using either 2 mg of the isotope californium-252, or a 3-MeV Van de Graaff accelerator as neutron source, the technique was found particularly suited to evaluation of adhesive bonds in metal honeycomb and phenolic fiberglas-to-metal structures. Adhesive flaws in a variety of bonded assemblies, including a set of test panels with built-in adhesive voids and unbonds, were detected by neutron radiographic inspection. In addition, detection of corrosion hidden within metal aircraft assemblies appears to be a promising application of neuron radiography. Corrosion products introduced into one such structure in the laboratory to simulate corrosion from a field situation were radiographically imaged for sizes ranging down to 0.030 in. in diameter and 0.002 in. in thickness. It is expected that with continued improvements in imaging techniques and mobility of neutron sources for radiography the technique will gain widespread usage for routine nondestructive inspection of many types of structures.
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1976 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Conference on Remote Systems Technology written by and published by . This book was released on 1988 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of a Neutron Imaging Platform Utilizing a Compact Electronic Neutron Generator for Evaluation of Analog and Digital Neutron Imaging Methods and Techniques written by Michael James Taylor and published by . This book was released on 2019 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike X-Rays that interact strongly with the electron cloud surrounding atoms, neutrons interact very weakly with these electrons, but quite strongly with the nucleus of the atom. X-Rays follow a nearly linear trend of decreasing transmission as the atomic number of the element increases. Neutrons follow no such behavior and certain isotopes of elements such as lithium, boron, cadmium, and gadolinium interact very strongly with neutrons, unlike dense elements such as lead or tungsten. This gives neutrons a unique probing capability where X-Rays do not suffice. Neutron imaging is widely used in the commercial sector for munitions and critical aerospace component inspection as well as in the research realm for biological forensics, cultural heritage providence studies, and capturing repetitive processes such as cyclical fluid motion in rotating motors. Current neutron sources are typically nuclear reactors and spallation sources that provide incredibly high neutron yields and flux for the images, leading to reduced image times and/or high spatial resolution as well as new imaging techniques such as computed tomography, polarized neutron imaging, and phase contrast imaging. However, such sources are very expensive, require thorough regulatory oversight, and pose biological hazards from spent nuclear materials. Smaller sources such as sealed tube deuterium-deuterium or deuterium-tritium sources can allow for in-field inspection at a fraction of the cost of a reactor, but don't necessarily provide fast image acquisitions or adequate image quality. This thesis explores a system that is intended to fill the space between weak portable devices and strong, costly, immobile ones. An accelerator-based neutron generator has been designed and manufactured by Phoenix LLC in Madison, WI. This system operates on the principle of deuterium-deuterium fusion, which releases a free 2.45MeV (nominal) neutron in the fusion process. The system can be installed and commissioned in different locations throughout its lifetime and provides for in-field or commercial inspection of components. It has a neutron yield several orders of magnitude higher than sealed-tube neutron sources. The goal herein was to: enhance the performance of the neutron generator through careful beamline design from the source to the target to obtain the maximum neutron yield, optimize the geometry of the neutron moderator and collimator to maximize the imaging metrics of a thermalized and collimated neutron beam free of background gamma and fast neutron radiation contamination, and find efficient neutron detector solutions that can capture high-quality neutron images. Monte Carlo simulations were extensively employed for these optimization efforts. The system has been shown to produce high quality neutron radiographs in terms of contrast, noise, and resolution, using many different techniques for imaging. Many materials were explored for moderation and shielding, and many neutron detectors were researched and experimented with to demonstrate advantages and disadvantages for their use on the Phoenix neutron imaging system. Sample images will be shown and discussed including conventional radiography using medical, industrial, and photographic film, 2-dimension digital imaging using pixelated cameras such as Charge Coupled Devices (CCD), Complementary Metal Oxide Semiconductors (CMOS), amorphous Silicon (aSi), and Computed Radiography (CR). Neutron Computed Tomography (nCT) is demonstrated as a 3-dimensional imaging technique as well. Case studies will be discussed and options for further optimization for collimator, moderator, and detector designs will be outlined. Recommendations for future research will be discussed in the final chapter.
Download or read book Application of Accelerators in Research and Industry written by and published by . This book was released on 1996 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Practicality of Pulsed Fast Neutron Transmission Spectroscopy for Aviation Security written by National Research Council and published by National Academies Press. This book was released on 1999-04-07 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major goal of the Federal Aviation Administration (FAA), and now the Transportation Security Administration (TSA), is the development of technologies for detecting explosives and illegal drugs in freight cargo and passenger luggage. One such technology is pulsed fast neutron analysis (PFNA). This technology is based on detection of signature radiation (gamma rays) induced in material scanned by a beam of neutrons. While PFNA may have the potential to meet TSA goals, it has many limitations. Because of these issues, the government asked the National Research Council to evaluate the potential of PFNA for airport use and compare it with current and future x-ray technology. The results of this survey are presented in "Assessment of the Practicality of Pulsed Fast Neutron Analysis for Aviation Security." A broad range of detection methods and test results are covered in this report. Tests conducted as of October 2000 showed that the PFNA system was unable to meet the stringent federal aviation requirements for explosive detection in air cargo containers. PFNA systems did, however, demonstrate some superior characteristics compared to existing x-ray systems in detecting explosives in cargo containers, though neither system performed entirely satisfactorily. Substantial improvements are needed in the PFNA detection algorithms to allow it to meet aviation detection standards for explosives in cargo and passenger baggage. The PFNA system currently requires a long scan time (an average of 90 minutes per container in the prototype testing in October 2000), needs considerable radiation shielding, is significantly larger than current x-ray systems, and has high implementation costs. These factors are likely to limit installation at airports, even if the detection capability is improved. Nevertheless, because PFNA has the best potential of any known technology for detecting explosives in cargo and luggage, this book discusses how continued research to improve detection capabilities and system design can best be applied for the airport environment.
Download or read book Effectiveness of the Air Force s Neutron Radiography Inspection Systems written by and published by . This book was released on 1991 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Force maintains facilities at the Sacramento Air Logistics Center containing a Maneuverable Neutron Radiography Inspection System, procured to detect hidden corrosion without disassembly of aircraft, and a Stationary Neutron Radiography Inspection System, procured to detect hidden corrosion in components removed from aircraft. The Maneuverable system became operational in December 1989. The Stationary system became operational in April 1991. The cost to develop and construct the systems was $23.8 million. Our objective was to evaluate the effectiveness of the neutron radiography inspection systems' ability to reduce maintenance costs. Specifically, we determined if joint use by all Military Departments would reduce DoD's weapon system maintenance costs. We also evaluated compliance with laws and regulations and the effectiveness of applicable internal controls.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1995 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron Imaging and Applications written by Ian S. Anderson and published by Springer. This book was released on 2010-10-28 with total page 341 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 Neutron Radiography written by Harold Berger and published by . This book was released on 1998 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron Imaging and Applications written by Ian S. Anderson and published by Springer. This book was released on 2011-09-08 with total page 0 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.
