Download or read book Superconductivity in Niobium Single Crystals written by Craig Seward Tedmon and published by . This book was released on 1962 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Superconductivity and Low Temperature Properties of Niobium Diselenide Single Crystals Grown by Direct Vapor Transport written by Norris Lewis and published by . This book was released on 1976 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Magnetic and Resistive Behaviour of Some Pure Superconducting Niobium Single Crystals written by Ian Robert Funnell and published by . This book was released on 1971 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronic Tunneling and Structure of Superconducting Niobium Single Crystals written by MASSACHUSETTS INST OF TECH CAMBRIDGE. and published by . This book was released on 1975 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evidence for a Second Energy Gap in Superconducting Niobium written by John W. Hafstrom and published by . This book was released on 1969 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tunneling measurements on superconducting Nb single crystals indicate the existence of a second energy gap for superconductivity, about 1/10 the width of the larger one, and independent of temperature between 0.48 and 4.2 degrees K. (Author).
Download or read book Trapped Flux in Superconducting Cold worked Single Crystals of Niobium written by Yukikazu Iwasa and published by . This book was released on 1962 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PLASTICITY OF SINGLE CRYSTALS OF NIOBIUM NIOBIUM MOLYBDENUM LEAD AND LEAD ALLOYS IN THE SUPERCONDUCTING AND NORMAL STATES AT 4 2 sup 0 K written by and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronic Tunneling Into Niobium Single Crystals written by Robert M. Rose and published by . This book was released on 1970 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The central theme of all the research supported by this contract is a single experiment: tunneling of electrons into (and from) the surface of a superconducting single crystal of Nb or a similar transition metal. The experimental work on the energy gap for niobium was completed. The existence of a second energy gap was shown and its properties were investigated. Both gaps were shown to be correlated with the Fermi surface and band structure of niobium.
Download or read book Investigating Single Crystal Plasticity of Niobium with a Dislocation Mechanics based Model written by Eureka Pai Kulyadi and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: One suggested method to manufacture superconducting radio frequency (SRF) cavities, which are used as driving units in particle accelerators, is the deep-drawing of Niobium (Nb) disks that were cut from large-grained ingots. This is a promising and cost-effective alternative to the current industry standard of deep-drawing rolled poly-crystalline sheets. It is essential to understand the sources of the observed variability in the performance of cavities fabricated by either process in order to define the most suitable fabrication route.Cavity performance is hampered by material defects such as dislocations or crystallite boundaries that can arise and evolve during deformation processes involved in the mechanical shaping of the cavity (mostly by deep-drawing). Such defects can trap magnetic flux causing significant radio frequency (RF) losses leading to reduced performance. Understanding dislocation mechanics in Nb based on deformation experiments allows predictive modeling to enable informed design strategies for optimal cavity fabrication and improved performance.Crystal plasticity (CP) modeling is a powerful and well-established computational materials science tool to investigate mechanical structure-property relations in crystalline materials. A dislocation mechanics-based constitutive description of plastic deformation in body-centered cubic (BCC) metals is used to formulate a CP model for Nb. Uniaxial tension experiments on several Nb single crystals cut from a large-grained ingot disk were conducted at several different strain rates. The specific selection of grains and the in-plane orientation of deformation samples cut from those grains were based on the active slip systems anticipated from SCHMID factor calculations. The results from these specifically designed deformation experiments are used to validate the model.Simulations and corresponding deformation experiments exhibit notable discrepancies in terms of the stress-strain response and lattice reorientation. These discrepancies are rationalized by considering the effect of a distribution in pre-existing dislocation densities across the possible slip systems, which entails a significant variability in the resulting slip system activity and associated crystal reorientation and strain hardening behavior. An exhaustive numerical study probing thousands of initial dislocation density distributions could be condensed into inverse pole figure (IPF) maps that chart the range of crystallographic tensile directions for which stable outcomes can be expected despite a given variability in the pre-existing dislocation density distribution. Consequently, it becomes clear that while single-crystal experiments can be a useful guide toward the development and testing of dislocation mechanics-based models, care must be exercised as to not expect a one-to-one matching between any specific experiment and its corresponding simulation, since the exact values and distribution of pre-existing dislocations in the sample is generally unknown (and likely unknowable).
Download or read book The Second Energy Gap in Superconducting Niobium written by J. W. Hafstrom and published by . This book was released on 1970 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low temperature tunneling studies of high purity single crystals of niobium indicate the existence of two energy gaps, delta sub s and delta sub d, one for each of the two bands lying at the Fermi level. The value of delta sub s i approximately delta sub d/19. The crystallographic dependence of delta sub s indicates that delta sub s does not appear in directions where there is no s-d overlap at E sub F. The behavior of delta sub s with temperature and magnetic field indicate that interband coupling is significant in niobium. The results are compared to current theories of multiband superconductivity.
Download or read book RF Superconductivity written by Hasan Padamsee and published by John Wiley & Sons. This book was released on 2009-04-20 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second book to RF Superconducting, written by one of the leading experts. The book provides fast and up-to-date access to the latest advances in the key technology for future accelerators. Experts as well as newcomers to the field will benefit from the discussion of progress in the basic science, technology as well as recent and forthcoming applications. Researchers in accelerator physics will also find much that is relevant to their discipline.
Download or read book Single Crystal Large Grain Niobium Technology written by Ganapati Rao Myneni and published by AIP Conference Proceedings / H. This book was released on 2007-08-30 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: SRF Technology based accelerators, FEL’s, and ERL’s, are becoming common worldwide. Several new frontier technologies and applications are expected to be evolving in coming years as the cost of SRF technology comes. Terra Hertz (THz) Science could benefit from these advances, and many applications are likely to be developed in the fields of medical imaging, material science, pharmaceuticals, communications etc.
Download or read book Deformation of Niobium Single Crystals at Low Temperature written by C. J. Bolton and published by . This book was released on 1971 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Niobium Alloys and Compounds written by M. Neuberger and published by Springer Science & Business Media. This book was released on 2013-12-11 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared by Hughes Aircraft Company, Culver City, California under Contract No. F33615-70-C-1348. The work was administered under the direction of the Air Force Materials Laboratory, Air Force Systems Cornrnand, Wright-Patterson Air Force Base, Ohio, with Mr. B. Emrich, Project Engineer. The Electronic Properties Information Center (EPIC) is a designated inforrnation Analysis Center of the Departrnent of Defense, authorized to provide inforrnation to the entire DoD cornrnunity. The purpose of the Center is to provide a highly competent source of inforrnation and data on the electronic, optical and magnetic properties of materials of value to the Department of Defense. Its major function is to evaluate, compile and publish the experimental data from the world's unclassified literature concerned with the properties of materials. All materials relevant to the field of electronics are within the scope of EPIC: insulators, semiconductors, metals, superconductors, ferrites, ferroelectrics, ferromagnetics, electro luminescents, therrnionic emitters and optical materials. The Center's scope includes inforrnation on over 100 basic properties of materials; information generally regarded as being in the area of devices and/or circuitry is excluded. Grateful acknowledgement is made for the review and comments of Dr. G. D. Cody of RCA Laboratories and Dr. B. W. Roberts of General Electric Co. V CONTENTS Introduction •. . ••••. . . ••••. . . . . . •• 1 Superconductivity Applications •••• 3 Niobium-Hydrogen •. . ••. •. ••. ••. . •• 15 Niobium-Antimony. • . . . • . • • • • . • • . • • .
Download or read book Superconducting Devices Materials written by and published by . This book was released on 1974 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-06 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Temperature Deformation of Niobium Single Crystals written by Earl Barner Schwenk and published by . This book was released on 1967 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
