Download or read book Additional Capabilities of a Compact Neutron Scatter Camera written by and published by . This book was released on 2015 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Progress in the Development of a Single Volume Neutron Scatter Camera written by and published by . This book was released on 2014 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Furthering Event Reconstruction in the Single Volume Neutron Scatter Camera written by and published by . This book was released on 2015 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fast Neutron Detection with a Neutron Scatter Camera written by and published by . This book was released on 2011 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Investigations Using the Neutron Scatter Camera written by and published by . This book was released on 2012 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fast Neutron Spectroscopy Using a Neutron Scatter Camera written by and published by . This book was released on 2011 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Method for Improving the Angular Resolution of a Neutron Scatter Camera written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An instrument that will directly image the fast fission neutrons from a special nuclear material source wherein the neutron detection efficiency is increased has been described. Instead of the previous technique that uses a time-of-flight (TOF) between 2 widely spaced fixed planes of neutron detectors to measure scatter neutron kinetic energy, we now use the recoil proton energy deposited in the second of the 2 scatter planes which can now be repositioned either much closer together or further apart. However, by doubling the separation distance between the 2 planes from 20 cm to a distance of 40 cm we improved the angular resolution of the detector from about 12.degree. to about 10.degree. A further doubling of the separation distance to 80 cm provided an addition improvement in angular resolution of the detector to about 6.degree. without adding additional detectors or ancillary electronics. The distance between planes also may be dynamically changed using a suitable common technique such as a gear- or motor-drive to toggle between the various positions. The angular resolution of this new configuration, therefore, is increased at the expanse of detection sensitivity. However, the diminished sensitivity may be acceptable for those applications where the detector is able to interrogate a particular site for an extended period.

Download or read book Advances in Imaging Fission Neutrons with a Neutron Scatter Camera written by and published by . This book was released on 2007 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Cost effective Portable Neutron Imager and Spectrometer Using Sinusoid based Multiplexing of Silicon Photomultipliers and Plastic Scintillators written by Marc Alan Wonders and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear nonproliferation and nuclear security require tools to detect, characterize, and locate special nuclear material (SNM). The measurement of neutrons emitted from SNM offers a non-destructive means of doing so, and neutron imaging is a particularly attractive application of neutron measurements to better understand a neutron source for various applications. A field-deployable neutron imager could, for example, be used to locate an improvised nuclear device for emergency response, verify the presence of a nuclear warhead in a disarmament scenario, confirm nuclear material declarations for nuclear safeguards, or find a nuclear weapon in certain envisioned warfighting situations. Unfortunately, the established methods of neutron imaging are difficult to translate from a laboratory setting to the field, primarily due to large sizes and limited maneuverability. The neutron imaging method with the greatest potential for compactness and portability is the neutron scatter camera (NSC) because it requires no modulation of the incoming signal, no moving parts, and does not use gases in the system. Beneficially, NSCs in principle also offer full four-pi angular sensitivity and inherently measure the energy of incident neutrons on an event-by-event basis. Advances in light sensor technology, for example in the development of silicon photomultipliers (SiPMs), have enabled the conception of truly compact NSCs: the single volume NSC and the quasi-single volume NSC. The close spacing of and position sensitivity within detector elements in these designs also enables much greater imaging efficiency. The quasi-single volume NSC is likely more feasible to construct in the near-term, and, within this design space, multiple imager configurations are possible with different performance in different characteristics such as detection efficiency, angular resolution, and cost. Performance in these characteristics typically varies inversely with that of the others, and different applications might prefer different qualities, discouraging a one-size-fits-all approach. This dissertation develops a compact, portable quasi-single volume NSC with an emphasis on inexpensively achieving a high detection efficiency. To accomplish this objective, SiPMs and plastic scintillators are chosen to comprise the imager, and a channel multiplexing method is used to increase the number of detector elements that can be used given digitization hardware restrictions. Extensive assessment of SiPM technology is carried out, and a novel sinusoid-based multiplexing method designed for SiPMs is created and shown to be effective and to maintain good detector performance. Geant4 simulations are used to design the multiplexed neutron imager (MiNI) and understand the effects of multiplexing, leading to the selection of a 32-scintillator 16-digitizer channel configuration. A number of calibrations are carried out to enable the imaging and spectroscopy capability of the MiNI, and where appropriate, these are also used as a large-scale test of the multiplexing method. The MiNI is tested with a 252Cf spontaneous fission source and its imaging capability is demonstrated with the source at multiple locations around the MiNI, as well as its spectroscopic capability. The MiNI developed in this dissertation is the first multiplexed NSC and the first reported quasi-single volume NSC composed of more than eight elements or plastic scintillators to fully demonstrate effective neutron imaging. Ultimately, the MiNI establishes the feasibility of multiplexing a compact NSC and demonstrates a route to achieve high imaging efficiency in a cost-effective manner.

Download or read book Elements of Slow Neutron Scattering written by J. M. Carpenter and published by Cambridge University Press. This book was released on 2015-09-24 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and up-to-date introduction to the fundamental theory and applications of slow-neutron scattering.

Download or read book Monte Carlo Simulations of a Single Volume Neutron Scatter Camera for In vivo Range Verification in Proton Therapy written by Kyrre Skjerdal and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Range uncertainties, limit the exploitation of the full potential of protons in clinical practice. The situation is especially more complicated when tumors are located in the close vicinity of organs at risk (OAR). The current clinical practice is to use safety margins (e.g. 3.5% of the nominal range + 1 mm or fixed 5 mm)1 or robust treatment planning to minimize the effects of range uncertainties2. In order to make proton therapy even safer, the development of on-line range monitoring techniques is, however, warranted. The state-of-the-art within range monitoring include techniques such as PET imaging, prompt gamma-ray (PG) imaging and spectroscopy as well as PG timing. We have previously explored the possibility of using secondary neutrons for the purposes of in-vivo range monitoring3. In this work, we propose a novel concept based on simultaneous detection and imaging of secondary neutrons and PGs for in-vivo range verification through utilizing a single volume neutron scatter camera (SVSC). We present the first results in terms of detection rates and statistical precision obtained through MCNP6.2 Monte Carlo (MC) simulations of the SVSC.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamentals of Nuclear Science and Engineering written by J. Kenneth Shultis and published by CRC Press. This book was released on 2007-09-07 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the bestselling first edition, there have been numerous advances in the field of nuclear science. In medicine, accelerator based teletherapy and electron-beam therapy have become standard. New demands in national security have stimulated major advances in nuclear instrumentation.An ideal introduction to the fundamentals of nuclear science and engineering, this book presents the basic nuclear science needed to understand and quantify an extensive range of nuclear phenomena. New to the Second Edition— A chapter on radiation detection by Douglas McGregor Up-to-date coverage of radiation hazards, reactor designs, and medical applications Flexible organization of material that allows for quick reference This edition also takes an in-depth look at particle accelerators, nuclear fusion reactions and devices, and nuclear technology in medical diagnostics and treatment. In addition, the author discusses applications such as the direct conversion of nuclear energy into electricity. The breadth of coverage is unparalleled, ranging from the theory and design characteristics of nuclear reactors to the identification of biological risks associated with ionizing radiation. All topics are supplemented with extensive nuclear data compilations to perform a wealth of calculations. Providing extensive coverage of physics, nuclear science, and nuclear technology of all types, this up-to-date second edition of Fundamentals of Nuclear Science and Engineering is a key reference for any physicists or engineer.

Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 1904 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Second Conference on the High Energy Radiation Background in Space written by and published by . This book was released on 1997 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Westinghouse Engineer written by and published by . This book was released on 1958 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cyclotrons And Their Applications Proceedings Of The13th International Conference Vancouver 1992 written by G Dutto and published by World Scientific. This book was released on 1993-01-08 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes the latest developments in the design, construction and operation of cyclotrons, from compact machines producing intense beams for isotope production, cancer therapy and industrial use, to the larger versions giving higher energy beams of ions of various elements for nuclear and particle physics. Important topics include ECR ion sources, superconducting magnets and radiofrequency cavities, beam dynamics and diagnostics, beam cooling rings, control systems and various medical and industrial applications.