The Experts below are selected from a list of 237 Experts worldwide ranked by ideXlab platform
Dimitris Mihailidis - One of the best experts on this subject based on the ideXlab platform.
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Neutron Physics for Nuclear Reactors: Unpublished Writings by Enrico Fermi - Neutron Physics for nuclear reactors, unpublished writings by Enrico Fermi
Medical physics, 2010Co-Authors: Dimitris MihailidisAbstract:This article reviews Neutron Physics for nuclear reactors, unpublished writings by Enrico Fermi by S. Esposito, O. Pisanti , Hackensack, NJ 2010. (Hardcover) 704 pp. Price: $111.00. 978–981–4392–22–4.
W. M. Snow - One of the best experts on this subject based on the ideXlab platform.
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Fundamental Neutron Physics beamline at the spallation Neutron source at ORNL
Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2015Co-Authors: Nadia Fomin, Geoffrey L. Greene, V. Cianciolo, R.r. Allen, P. R. Huffman, Christopher Crawford, T.m. Tito, Erik B. Iverson, R. Mahurin, W. M. SnowAbstract:Abstract We describe the Fundamental Neutron Physics Beamline (FnPB) facility located at the Spallation Neutron Source at Oak Ridge National Laboratory. The FnPB was designed for the conduct of experiments that investigate scientific issues in nuclear Physics, particle Physics, astroPhysics and cosmology using a pulsed slow Neutron beam. We present a detailed description of the design philosophy, beamline components, and measured fluxes of the polychromatic and monochromatic beams.
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experiments in fundamental Neutron Physics
arXiv: Nuclear Experiment, 2006Co-Authors: Jeffrey S. Nico, W. M. SnowAbstract:Experiments using slow Neutrons address a growing range of scientific issues spanning nuclear Physics, particle Physics, astroPhysics, and cosmology. The field of fundamental Physics using Neutrons has experienced a significant increase in activity over the last two decades. This review summarizes some of the recent developments in the field and outlines some of the prospects for future research.
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The Fundamental Neutron Physics Beamline at the Spallation Neutron Source.
Journal of research of the National Institute of Standards and Technology, 2005Co-Authors: Geoffrey L. Greene, V. Cianciolo, Paul Edward Koehler, R.r. Allen, W. M. Snow, P. R. Huffman, C. R. Gould, David Bowman, M. D. Cooper, John M. DoyleAbstract:The Spallation Neutron Source (SNS), currently under construction at Oak Ridge National Laboratory with an anticipated start-up in early 2006, will provide the most intense pulsed beams of cold Neutrons in the world. At a projected power of 1.4 MW, the time averaged fluxes and fluences of the SNS will approach those of high flux reactors. One of the flight paths on the cold, coupled moderator will be devoted to fundamental Neutron Physics. The fundamental Neutron Physics beamline is anticipated to include two beam-lines; a broad band cold beam, and a monochromatic beam of 0.89 nm Neutrons for ultracold Neutron (UCN) experiments. The fundamental Neutron Physics beamline will be operated as a user facility with experiment selection based on a peer reviewed proposal process. An initial program of five experiments in Neutron decay, hadronic weak interaction and time reversal symmetry violation have been proposed.
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FUNDAMENTAL Neutron Physics
Annual Review of Nuclear and Particle Science, 2005Co-Authors: Jeffrey S. Nico, W. M. SnowAbstract:▪ Abstract Experiments using slow Neutrons address a growing range of scientific issues spanning nuclear Physics, particle Physics, astroPhysics, and cosmology. The field of fundamental Physics using Neutrons has experienced a significant increase in activity over the last two decades. This review summarizes some of the recent developments in the field and outlines some of the prospects for future research.
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Facilities for Fundamental Neutron Physics Research at the NIST Cold Neutron Research Facility
Journal of research of the National Institute of Standards and Technology, 1993Co-Authors: Muhammad Arif, Geoffrey L. Greene, Maynard S. Dewey, W. M. SnowAbstract:The features of two fundamental Neutron Physics research stations at the NIST cold Neutron research facility are described in some detail. A list of proposed initial experimental programs for these two stations is also given.
Geoffrey L. Greene - One of the best experts on this subject based on the ideXlab platform.
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Fundamental Neutron Physics beamline at the spallation Neutron source at ORNL
Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2015Co-Authors: Nadia Fomin, Geoffrey L. Greene, V. Cianciolo, R.r. Allen, P. R. Huffman, Christopher Crawford, T.m. Tito, Erik B. Iverson, R. Mahurin, W. M. SnowAbstract:Abstract We describe the Fundamental Neutron Physics Beamline (FnPB) facility located at the Spallation Neutron Source at Oak Ridge National Laboratory. The FnPB was designed for the conduct of experiments that investigate scientific issues in nuclear Physics, particle Physics, astroPhysics and cosmology using a pulsed slow Neutron beam. We present a detailed description of the design philosophy, beamline components, and measured fluxes of the polychromatic and monochromatic beams.
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The implementation of a super mirror polarizer at the SNS fundamental Neutron Physics beamline
Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2012Co-Authors: S. Balascuta, Geoffrey L. Greene, Christopher Crawford, Ricardo Alarcon, S. Baeβler, Alexander Mietke, Robert Milburn, S. I. Penttilä, J. Prince, J. SchädlerAbstract:Abstract A new bender supermirror polarizer is used to polarize the cold Neutron beam at the Fundamental Neutron Physics Beamline at the Spallation Neutron Source. We present the design of a compensation magnet that was built around the polarizer to minimize the polarizer fringe fields that could compromise the magnetic field requirements of the NPDGamma experiment for the field uniformity in the spin rotator and the field direction in the liquid hydrogen target located downstream from the polarizer. The entire magnetic field environment of the experiment has been analyzed using a finite-element model. Measurements of the magnetic field gradients and field direction have been carried out and the results are less than the upper limits required in the experiment. According to the results the compensated fields meet the stringent magnetic field requirements of the experiment defined by the systematic errors that have to be well below the statistical uncertainty of 10 −8 in our main observable, the gamma asymmetry in Neutron capture on hydrogen. We describe the design of the magnetic field, the construction of the compensation magnet, and we compare results of the field measurements with the results from the model.
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The Fundamental Neutron Physics Beamline at the Spallation Neutron Source.
Journal of research of the National Institute of Standards and Technology, 2005Co-Authors: Geoffrey L. Greene, V. Cianciolo, Paul Edward Koehler, R.r. Allen, W. M. Snow, P. R. Huffman, C. R. Gould, David Bowman, M. D. Cooper, John M. DoyleAbstract:The Spallation Neutron Source (SNS), currently under construction at Oak Ridge National Laboratory with an anticipated start-up in early 2006, will provide the most intense pulsed beams of cold Neutrons in the world. At a projected power of 1.4 MW, the time averaged fluxes and fluences of the SNS will approach those of high flux reactors. One of the flight paths on the cold, coupled moderator will be devoted to fundamental Neutron Physics. The fundamental Neutron Physics beamline is anticipated to include two beam-lines; a broad band cold beam, and a monochromatic beam of 0.89 nm Neutrons for ultracold Neutron (UCN) experiments. The fundamental Neutron Physics beamline will be operated as a user facility with experiment selection based on a peer reviewed proposal process. An initial program of five experiments in Neutron decay, hadronic weak interaction and time reversal symmetry violation have been proposed.
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Simulation of the Performance of a Fundamental Neutron Physics Beamline at the High Flux Isotope Reactor
Journal of research of the National Institute of Standards and Technology, 2005Co-Authors: R. Mahurin, Geoffrey L. Greene, Paul Kohler, V. CiancioloAbstract:We study the expected performance of the proposed fundamental Neutron Physics beamline at the upgraded High Flux Isotope Reactor at Oak Ridge National Laboratory. A curved Neutron guide transmits the Neutrons from the new cold source into a guide hall. A novel feature of the proposed guide is the use of vertical focussing to increase the flux for experiments that require relatively small cross-section beams. We use the simulation code IB to model straight, multi-channel curved, and tapered guides of various m values. Guide performance for the current NPDGamma and proposed abBA experiments is evaluated.
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Beamline Performance Simulations for the Fundamental Neutron Physics Beamline at the Spallation Neutron Source
Journal of research of the National Institute of Standards and Technology, 2005Co-Authors: P. R. Huffman, Geoffrey L. Greene, V. Cianciolo, Paul Edward Koehler, R.r. Allen, R. Mahurin, R. R. Huerto, D. Desai, A. Yue, G. R. PalmquistAbstract:Monte Carlo simulations are being performed to design and characterize the Neutron optics components for the two fundamental Neutron Physics beamlines at the Spallation Neutron Source. Optimization of the cold beamline includes characterization of the guides and benders, the Neutron transmission through the 0.89 nm monochromator, and the expected performance of the four time-of-flight choppers. The locations and opening angles of the choppers have been studied using a simple spreadsheet-based analysis that was developed for other SNS chopper instruments. The spreadsheet parameters are then optimized using Monte Carlo techniques to obtain the results presented in this paper. Optimization of the 0.89 nm beamline includes characterizing the double crystal monochromator and the downstream guides. The simulations continue to be refined as components are ordered and their exact size and performance specifications are determined.
M. Zanarini - One of the best experts on this subject based on the ideXlab platform.
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Advanced imaging techniques: A new deal for Neutron Physics
La Rivista del Nuovo Cimento (1978-1999), 1995Co-Authors: F. Casali, P. Chirco, M. ZanariniAbstract:Among non-destructive evaluations and methodologies—the important set of analyses which preserve the integrity of the tested object—Neutron imaging techniques, and Neutron computerized tomography in particular, represent powerful tools. Although they have been considered more an amusement for scientists rather than an effective tool for engineers until few years ago, it can be stated that they can now provide valuable quantitative results in many circumstances of interest, being the only available choice in some specific cases. This wider interest and the attempt to give Neutron imaging a certain prominence reflect themselves in the birth of an international group of people involved in the field of Neutron research; the so-called ENRWG (European Neutron Radiography Working Group). Connected to a general interest and a diffuse curiosity in the fascinating interactive world of INTERNET there is also the possibility, since last year, to get information about Neutron radiography state of the art and current projects from a free-access WWW site. As a consequence of these fervent activities, a new deal in studies of advanced materials, sources, detectors and algorithms is now growing to promote and to develop the capabilities of Neutron imaging techniques after a long period during which the interest in Neutron Physics and in their applications was limited to selected specialists involved in the nuclear-energy production. The results of this effort will not be limited to improved technological processes, but will include an improved knowledge in relevant fields of nuclear and material science.
Jeffrey S. Nico - One of the best experts on this subject based on the ideXlab platform.
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experiments in fundamental Neutron Physics
arXiv: Nuclear Experiment, 2006Co-Authors: Jeffrey S. Nico, W. M. SnowAbstract:Experiments using slow Neutrons address a growing range of scientific issues spanning nuclear Physics, particle Physics, astroPhysics, and cosmology. The field of fundamental Physics using Neutrons has experienced a significant increase in activity over the last two decades. This review summarizes some of the recent developments in the field and outlines some of the prospects for future research.
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The fundamental Neutron Physics facilities at NIST
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, 2005Co-Authors: Maynard S. Dewey, Muhammad Arif, Jeffrey S. Nico, Thomas R. Gentile, David M. Gilliam, David L. Jacobson, Alan K. ThompsonAbstract:The National Institute of Standards and Technology (NIST) Center for Neutron Research (NCNR) is a national center that provides thermal and cold Neutrons beams for activities such as condensed matter Physics, materials science, nuclear chemistry, and biological science. Four beams are currently in use for fundamental Physics experiments. These include a high-intensity polychromatic beam, a 0.496 nm monochromatic beam, a 0.89 nm monochromatic beam, and a Neutron interferometer and optics facility. Experiments focus primarily on studies of the weak interaction using Neutrons. This paper provides a general overview of the facilities and highlights some current experiments.
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The Fundamental Neutron Physics Facilities at NIST.
Journal of research of the National Institute of Standards and Technology, 2005Co-Authors: Jeffrey S. Nico, P. R. Huffman, Muhammad Arif, Maynard S. Dewey, Thomas R. Gentile, David M. Gilliam, David L. Jacobson, Alan K. ThompsonAbstract:The program in fundamental Neutron Physics at the National Institute of Standards and Technology (NIST) began nearly two decades ago. The Neutron Interactions and Dosimetry Group currently maintains four Neutron beam lines dedicated to studies of fundamental Neutron interactions. The Neutrons are provided by the NIST Center for Neutron Research, a national user facility for studies that include condensed matter Physics, materials science, nuclear chemistry, and biological science. The beam lines for fundamental Physics experiments include a high-intensity polychromatic beam, a 0.496 nm monochromatic beam, a 0.89 nm monochromatic beam, and a Neutron interferometer and optics facility. This paper discusses some of the parameters of the beam lines along with brief presentations of some of the experiments performed at the facilities.
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FUNDAMENTAL Neutron Physics
Annual Review of Nuclear and Particle Science, 2005Co-Authors: Jeffrey S. Nico, W. M. SnowAbstract:▪ Abstract Experiments using slow Neutrons address a growing range of scientific issues spanning nuclear Physics, particle Physics, astroPhysics, and cosmology. The field of fundamental Physics using Neutrons has experienced a significant increase in activity over the last two decades. This review summarizes some of the recent developments in the field and outlines some of the prospects for future research.
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The Fundamental Neutron Physics Facilities at NIST
AIP Conference Proceedings, 2003Co-Authors: P. R. Huffman, Muhammad Arif, Maynard S. Dewey, Jeffrey S. Nico, Thomas R. Gentile, David M. Gilliam, David L. Jacobson, Alan K. ThompsonAbstract:The National Institute of Standards and Technology (NIST) Center for Neutron Research (NCNR) is a national center that provides thermal and cold Neutrons beams for activities such as materials science, biological, polymer, and fundamental Physics research. Four beams are currently in use for fundamental Physics experiments. These include a Neutron optics and interferometry facility, a 0.496 nm monochromatic beam, a 0.89 nm monochromatic beam, and a high‐intensity polychromatic beam. Experiments primarily focus on studies of the weak interaction using Neutrons. This paper provides a general overview of the facilities and highlights some current experiments.