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Design And Testing Of A Prototype Slow Positron Beam At The Nc State University Pulstar Reactor
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Book Synopsis Design and Testing of a Prototype Slow Positron Beam at the NC State University PULSTAR Reactor by :
Download or read book Design and Testing of a Prototype Slow Positron Beam at the NC State University PULSTAR Reactor written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Slow positrons have proven to be a powerful tool for the analysis of materials. This nondestructive probe is capable of reconstructing the electronic environment below the surface of materials utilizing the conservation of energy and momentum on the annihilation quanta. Radioactive sources are capable of producing slow positron rates on the order of 106 Hz, but the pair production mechanism is necessary to produce more intense beams. The environment in the vicinity of nuclear reactor cores is capable of producing copious amounts of photons with energy above the threshold for the pair production mechanism. MCNP simulations were performed which modeled North Carolina State University's PULSTAR reactor to calculate the photon flux above the pair production threshold energy. It was determined that the addition of cadmium to the end of the beam port would enhance the photon flux by a factor of 3. Further simulations demonstrated that core optimization could increase the flux by an additional factor of 2. A positron beam was designed to focus positrons produced in the vicinity of the core into a solenoid which would allow transport through the biological shield. SIMION simulations were performed to demonstrate the effectiveness of the proposed beam and concluded that the beam design could focus positrons with a wide range of energies. A prototype beam was completed and placed within a beam port of the PULSTAR reactor. Tests immediately demonstrated the production and control of slow positrons. Additional tests established the dependence of the count rate on the axial magnetic field of the solenoid, with a maximum count rate achieved by the prototype beam being 33x107 slow positrons per second. The knowledge gained from the prototype can be applied to future work to improve the overall beam effectiveness. Future works includes the bending of the solenoid and implementation of core optimizations. The size of the moderator can also be increased from that of the p.
Book Synopsis Design and Testing of a Prototype Slow Positron Beam at the NC State University PULSTAR Reactor by : Alfred Gaston Hathaway
Download or read book Design and Testing of a Prototype Slow Positron Beam at the NC State University PULSTAR Reactor written by Alfred Gaston Hathaway and published by . This book was released on 2005 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: Ion Optics, PULSTAR, Pair Production, Slow Positron Beam, Positron.
Book Synopsis Dielectric Films for Advanced Microelectronics by : Mikhail Baklanov
Download or read book Dielectric Films for Advanced Microelectronics written by Mikhail Baklanov and published by John Wiley & Sons. This book was released on 2007-04-04 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topic of thin films is an area of increasing importance in materials science, electrical engineering and applied solid state physics; with both research and industrial applications in microelectronics, computer manufacturing, and physical devices. Advanced, high-performance computers, high-definition TV, broadband imaging systems, flat-panel displays, robotic systems, and medical electronics and diagnostics are a few examples of the miniaturized device technologies that depend on the utilization of thin film materials. This book presents an in-depth overview of the novel developments made by the scientific leaders in the area of modern dielectric films for advanced microelectronic applications. It contains clear, concise explanations of material science of dielectric films and their problem for device operation, including high-k, low-k, medium-k dielectric films and also specific features and requirements for dielectric films used in the packaging technology. A broad range of related topics are covered, from physical principles to design, fabrication, characterization, and applications of novel dielectric films.
Book Synopsis Transactions of the American Nuclear Society by : American Nuclear Society
Download or read book Transactions of the American Nuclear Society written by American Nuclear Society and published by . This book was released on 1958 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Review of Materials Research by :
Download or read book Annual Review of Materials Research written by and published by . This book was released on 2006 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Construction of a Slow Positron Beam by : Sarah K. Makoski
Download or read book Design and Construction of a Slow Positron Beam written by Sarah K. Makoski and published by . This book was released on 1993 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Slow Positron Beam Techniques for Solids and Surfaces by : Eric Ottewitte
Download or read book Slow Positron Beam Techniques for Solids and Surfaces written by Eric Ottewitte and published by American Institute of Physics. This book was released on 1994 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text examines the application of positron beams to studies of solids and surfaces with profiles for an increasing array of materials. It presents the progress made in areas of defect profiling, including improvements in theoretical modelling.
Book Synopsis Proceedings of the Specialist Meeting on Positron Beam Techniques for Science and Engineering by : Kyoto University. Research Reactor Institute
Download or read book Proceedings of the Specialist Meeting on Positron Beam Techniques for Science and Engineering written by Kyoto University. Research Reactor Institute and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Delft Intense Slow Positron Beam 2D-ACAR Facility for Analysis of Nanocavities and Quantum Dots by : Claudiu Valentin Falub
Download or read book The Delft Intense Slow Positron Beam 2D-ACAR Facility for Analysis of Nanocavities and Quantum Dots written by Claudiu Valentin Falub and published by Delft University Press. This book was released on 2002-01-01 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Slow Positron Beam Techniques for Solids and Surfaces by : Eric Ottewitte
Download or read book Slow Positron Beam Techniques for Solids and Surfaces written by Eric Ottewitte and published by . This book was released on 1994 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Production and Characterization of a Slow Positron Beam by : Derek Fawcett
Download or read book Production and Characterization of a Slow Positron Beam written by Derek Fawcett and published by . This book was released on 1989 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Specialist Meeting on Positron Beam Techniques for Science and Engineering by : Kyoto University. Research Reactor Institute
Download or read book Proceedings of the Specialist Meeting on Positron Beam Techniques for Science and Engineering written by Kyoto University. Research Reactor Institute and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Specialist Meeting on Positron Beam Techniques for Science and Engineering by : Kyoto University. Research Reactor Institute
Download or read book Proceedings of the Specialist Meeting on Positron Beam Techniques for Science and Engineering written by Kyoto University. Research Reactor Institute and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Specialist Meeting on Positron Beam Techniques for Science and Engineering by : Kyoto University. Research Reactor Institute
Download or read book Proceedings of the Specialist Meeting on Positron Beam Techniques for Science and Engineering written by Kyoto University. Research Reactor Institute and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Workshop on Intense Slow Positron Beams and Applications in Condensed Matter Physics. 1989, Villingen Publisher : ISBN 13 : Total Pages :178 pages Book Rating :4.:/5 (311 download)
Book Synopsis Proceedings of the PSI Workshop on on Intense Slow Positron Beams and Applications in Condensed Matter Physics by : Workshop on Intense Slow Positron Beams and Applications in Condensed Matter Physics. 1989, Villingen
Download or read book Proceedings of the PSI Workshop on on Intense Slow Positron Beams and Applications in Condensed Matter Physics written by Workshop on Intense Slow Positron Beams and Applications in Condensed Matter Physics. 1989, Villingen and published by . This book was released on 1990 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis SLOPOS-7 : Proceedings of the Seventh International Workshop on Slow-Positron Beam Techniques for Solids and Surfaces : Unterägeri, Switzerland, June 2-7, 1996 by : Waldemar B. Waeber
Download or read book SLOPOS-7 : Proceedings of the Seventh International Workshop on Slow-Positron Beam Techniques for Solids and Surfaces : Unterägeri, Switzerland, June 2-7, 1996 written by Waldemar B. Waeber and published by . This book was released on 1997 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis (DURIP98/99) Slow Positron Beam for Material and Surface Characterization by :
Download or read book (DURIP98/99) Slow Positron Beam for Material and Surface Characterization written by and published by . This book was released on 2000 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variable, mono-energetic slow positron beam (0-30 keV) coupled with Doppler broadening of annihilation radiation and positron lifetime measurements has been constructed at the University of Missouri-Kansas City. The beam is ideal for surface and materials characterization of defects of polymeric and coating materials in the range of sub-nanometer on the surface to a few microns in the bulk. This instrument becomes one of five slow positron beams currently available in the US for research on sub-nanometer defects and for training students and scientists in defense-related research. The performance of the beam, the counting rate and the resolution, is one of the best in the world.
