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Program To Study Ac Loss In High Tc Superconductors
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Book Synopsis Program to Study AC Loss in High-Tc Superconductors by :
Download or read book Program to Study AC Loss in High-Tc Superconductors written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work performed under this program consisted of (a) consultative work with Wright-Patterson Air Force Base, (b) joint work with WPAFB to develop a concept for converting YBCO films deposited on a wide substrate strip into a conductor with a pattern of narrow spiral filamentary strips for AC operation, (c) calculation of the additional losses due to substrates on YBCO conductors and sheaths on BSCCO type conductors, and (d) new loss theory for polycrystalline high-T(c) superconductors based on Maxwell's equations.
Book Synopsis AC Losses in High-Temperature Superconductor Tapes and Cables for Power Applications by : Godfrin, Aurélien
Download or read book AC Losses in High-Temperature Superconductor Tapes and Cables for Power Applications written by Godfrin, Aurélien and published by KIT Scientific Publishing. This book was released on 2022-05-10 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work focuses on two topics. The first is the investigation of producing filaments on copper-stabilized coated conductors, with striations made after or before electroplating the tape. The second topic is the applicability of the striations for reducing the AC losses of cables, in particular the CORC® and RACC cables, which are made with high-temperature superconductor (HTS) striated tapes.
Download or read book Fachplan Wirtschaft und Arbeit written by and published by . This book was released on 1975 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Second Generation High Temperature Superconductors: Electromagnetic Characteristics and AC Loss Analysis by : Boyang Shen
Download or read book Study of Second Generation High Temperature Superconductors: Electromagnetic Characteristics and AC Loss Analysis written by Boyang Shen and published by Springer Nature. This book was released on 2020-08-31 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis introduces a systematic study on Second Generation (2G) High Temperature Superconductors (HTS), covering a novel design of an advanced medical imaging device using HTS, and an in-depth investigation on the losses of HTS. The text covers the design and simulation of a superconducting Lorentz Force Electrical Impedance Tomography. This is potentially a significant medical device that is more efficient and compact than an MRI, and is capable of detecting early cancer, as well as other pathologies such stroke and internal haemorrhages. It also presents the information regarding the fundamental physics of superconductivity, concentrating on the AC losses in superconducting coils and tapes. Overall, the thesis signifies an important contribution to the investigation of High Temperature Superconductors. This thesis will be beneficial to the development of advanced superconducting applications in healthcare as well as more broadly in electrical and energy systems.
Book Synopsis A.C. Losses and Flux Pinning in High Temperature Superconductors by : Anant Narlikar
Download or read book A.C. Losses and Flux Pinning in High Temperature Superconductors written by Anant Narlikar and published by . This book was released on 2000 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on the issue of AC losses in wires and tapes, with chapters on AC losses of HTS tapes and wires, AC susceptibility and losses of Bi- 2223/Ag tapes in perpendicular AC magnetic fields, AC losses in bulk high-temperature superconductors, modeling and computation of AC losses in HTS conductors and magnets, residual losses in high Tc superconductors, transport property and AC losses of high Tc superconducting tape and conductors, and flux pinning in 123-type high Tc superconductors.
Book Synopsis A.C. Losses and Flux Pinning and Formation of Stripe Phase by : A. V. Narlikar
Download or read book A.C. Losses and Flux Pinning and Formation of Stripe Phase written by A. V. Narlikar and published by Nova Biomedical Books. This book was released on 2000 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: AC Losses & Flux Pinning & Formation of Stripe Phase
Book Synopsis Studies On AC Losses In Certain Type II Superconductors by :
Download or read book Studies On AC Losses In Certain Type II Superconductors written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies on ac losses in superconductors have been a subject of great interest for a long time not only as an important topic in fundamental science, but also as a basic requirement for the application of superconductors. A proper understanding of the mechanisms of ac losses and their quantitative knowledge is an essential requirement for any application. Such studies not only yield information on the material parameters crucial for applications but can also provide a test for any possible microscopic theory of superconductivity. The main focus of the current thesis is to understand the mechanisms of ac losses in superconductors and to gain more knowledge on the ac dissipative behavior of type II superconductors. In this thesis we report our investigations on the ac losses in certain type II superconductors at different ranges of frequency through different experimental techniques. We have investigated the ac losses that arise in high Tc superconducting single crystals at rf frequency (8 MHz) using a simple LC oscillator technique. The result shows a surprising ac dissipation behavior in which the loss in the superconducting state is more than the normal state loss. Even though the superconducting state is defined as the zero resistive state, this is true only for dc transport. The ac resistivity studies have been made also on high Tc polycrystalline samples using the standard four-probe technique using a lock-in amplifier (100 kHz). The result shows different ac resistive behavior for samples with different microstructures. Non-resonant microwave absorption (NRMA) studies in MgB2 thin films is reported for the first time. The experiment has been performed using a continuous wave X band EPR spectrometer. The recorded signals give information on the ac losses that occurs at microwave frequency (9.43 GHz). The effects of ac magnetic field on the superconductors have been investigated through a dc four-probe resistivity measurements in the presence of an ac field of dif.
Book Synopsis Advances in Superconductivity III by : Koji Kajimura
Download or read book Advances in Superconductivity III written by Koji Kajimura and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of high temperature superconductors, many new materials have been invented. In the last year, several new materials were also discovered, but their critical temperatures are still below lOOK. Precise physical and chemical work has made tremendous progress in the theoretical and experimental study of physical properties and carrier state characterizations. The de Haas van Alphen effect measurement showed the existence of a Fermi surface in YBCO. Flux dynamics is a well-known new problem in which flux creep and irreversibility line features are especially important for a fundamental understanding of the critical current and flux pinning. Flux pinning centers which are intentionally added using non-superconducting precipitates, neutrons, and protons, etc. increase critical currents to practical levels. The analysis of electric and magnetic properties are expected to reveal the pinning mechanism and also to further application development. As for wires and bulks, many melt-like sintering techniques have improved the material performance of critical current densities. A new seeding Quench-Melt Growth technique enlarged crystal size and increased the repulsion force. These melting processes, in conjunction with a mechanical strength improvement have been effectively introduced into wire fabrication in order to realize kilometer range wires and will put the oxide wires to practical use. Where thin film is con cerned, when many fabrication methods had been developed using the assistance effect of activated oxygen such as ozone and oxygen radicals, a high current 2 density of 106A/cm at 77K was reported.
Book Synopsis AC Loss Characteristic of High-Tc Superconductors in Rotating Magnetic Field by : Probir Kumar Ghoshal
Download or read book AC Loss Characteristic of High-Tc Superconductors in Rotating Magnetic Field written by Probir Kumar Ghoshal and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AC LOSS AND STABILITY OF LOW-AND HIGH-Tc-SUPERCONDUCTORS by : H. H. J. Ten Kate
Download or read book AC LOSS AND STABILITY OF LOW-AND HIGH-Tc-SUPERCONDUCTORS written by H. H. J. Ten Kate and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AC Loss and Macroscopic Theory of Superconductors by : W.J. Carr, Jr.
Download or read book AC Loss and Macroscopic Theory of Superconductors written by W.J. Carr, Jr. and published by CRC Press. This book was released on 2001-07-05 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through the 'magic' of averages it is shown that Maxwell's equations can be used in a simple way to describe filamentary composites as well as pure bulk superconductors. The second edition of AC Loss and Macroscopic Theory of Superconductors, like the first edition, is written for both physicists and engineers. It starts with a rigorous and partially new derivation of Maxwell's equations as they apply to superconductors, and the remainder of the book is devoted to loss approximations for a wide range of applications. The chapters on high-Tc materials were updated and include a change to SI units and the addition of some historical perspective.
Book Synopsis High Tc Superconductors by : J. Dumas
Download or read book High Tc Superconductors written by J. Dumas and published by Elsevier. This book was released on 1993-05-05 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wide range of progress in materials development [single crystals, ceramics, thin films, wire and tapes] is reported in the 169 papers in this volume. The main focus of the papers is in attaining a better understanding of the relationship between microstructure and electrical properties. Invited papers cover topics such as the effects of substitution and doping; multilayers; nanostructure characterisation; electric field effects in High Tc Superconductors [HTS]; surface stability; critical currents; flux pinning and magnetooptic imaging of flux patterns; effects of irradiation induced defects; properties and preparation of materials; microwave properties and electronic devices. A clearly broadened basis for understanding processes and mechanisms in [HTS] is portrayed. Appreciable progress has been achieved in the reproducible manufacturing of high quality materials supported by very efficient methods in microstructural analysis. This essential improvement is reflected in the increased number of practical devices encouraging the use of HTS in applications for electronics and power engineering, all of which are reviewed in depth in this work.
Book Synopsis Studies on AC Loss and Critical Current Density in Practical High Temperature Superconductors by : Cui Hua Cheng
Download or read book Studies on AC Loss and Critical Current Density in Practical High Temperature Superconductors written by Cui Hua Cheng and published by . This book was released on 2002 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Theoretical and Experimental Study of the AC Losses of a High Field Superconductor and the Implications for Power Applications by : Donald Joseph Hanrahan
Download or read book A Theoretical and Experimental Study of the AC Losses of a High Field Superconductor and the Implications for Power Applications written by Donald Joseph Hanrahan and published by . This book was released on 1969 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theory for the hysteresis loss of a high-field superconductor carrying ac is presented, based on the Riemersma critical state model (B x J = C). Voltage waveforms, energy loss per cycle, and limiting values of effective resistivity are derived. For sinusoidal current of frequency f in 10-mil wire the high (critical) current limit of resistivity is found to be 4.06 x 10 to the -14th power f (ohm-meter) compared to 0.93 x 10 to the -16th power f for a current peak of one-tenth the critical current; both values are independent of the high-field material used. An equivalent circuit consisting of a variable inductance is proposed for the hysteretic superconductor and three possible definitions of the inductance are discussed. In any case, the inductance is nonlinear, a transcendental function of the current, the function being different on the four segments of a hysteresis loop. The high-current limit of the absolute, internal inductance (the preferred definition) per unit length is mu sub zero/3 pi (henry/meter). Experiments were performed at 4.2K on bifilar windings of 10-mil, Nb25%Zr wire, both bare and copper plated. Currents up to the critical value were used at frequencies of 60, 400, and 800 Hz. The feasibility of applying superconductivity to two classes of ac power equipment is discussed: (1) conventional apparatus such as transformers and rotating machines, already highly efficient, and (2) low-voltage static inverters which are not so efficient. A novel circuit is presented for a superconducting inverter or oscillator. (Author).
Book Synopsis Advances in Superconductivity V by : Yoshichika Bando
Download or read book Advances in Superconductivity V written by Yoshichika Bando and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers all research fields in high Tc Superconductivity. Breakthrougs in the single crystal growth of a monolithic device leads to a new technology.
Author :U. Balu Balachandran Publisher :Springer Science & Business Media ISBN 13 :9780306463983 Total Pages :664 pages Book Rating :4.4/5 (639 download)
Book Synopsis Advances in Cryogenic Engineering Materials by : U. Balu Balachandran
Download or read book Advances in Cryogenic Engineering Materials written by U. Balu Balachandran and published by Springer Science & Business Media. This book was released on 2000-06-30 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1999 Joint Cryogenic Engineering Conference (CEC) and International Cryogenic Materials Conference (ICMC) were held in Montreal, Quebec, Canada from July 12th to July 16th. The joint conference theme was "Cryogenics into the Next Millennium". The total conference attendance was 797 with participation from 28 countries. As with previous joint CEC and ICMC Conferences, the participants were able to benefit from the joint conference's coverage of cryogenic applications and materials and their interactions. The conference format of plenary, oral and poster presentations, and an extensive commercial exhibit, the largest in CEC-ICMC history, aimed to promote this synergy. The addition of short courses, workshops, and a discussion meeting enabled participants to focus on some of their specialties. The technical tour, organized by Suzanne Gendron, was of Hydro-Quebec's research institute laboratories near Montreal. In keeping with the conference venue the entertainment theme was Jazz, culminating in .the performance of Vic Vogel and his Jazz Big Band at the conference banquet. This 1999 ICMC Conference was chaired by Julian Cave of IREQ - Institut de recherche d'Hydro-Quebec, and the Program Chair and Vice-Chair were Michael Green of the Lawrence Berkeley National Laboratory and Balu Balachandran of the Argonne National Laboratory respectively. We especially appreciate the contributions of both the CEC and ICMC Boards and the conference managers, Centennial Conferences, under the supervision of Paula Pair and Kim Bass, in making this conference a success.
Book Synopsis High Temperature Superconductivity 2 by : Anant V. Narlikar
Download or read book High Temperature Superconductivity 2 written by Anant V. Narlikar and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: In contrast to research on the fundamental mechanisms of High-Temperature Superconductivity, in recent years we have seen enormous developments in the fabrication and application of High-Tc-superconductors. The two volumes of High Temperature Superconductivity provide a survey of the state of the technology and engineering applications of these materials. They comprise extended original research papers and technical review articles written by physicists, chemists, materials scientists and engineers, all of them noted experts in their fields. The interdisciplinary and strictly application-oriented coverage should benefit graduate students and academic researchers in the mentioned areas as well as industrial experts. Volume 1 "Materials" focuses on major technical advancements in High-Tc materials processing for applications. Volume 2 "Engineering Applications" covers numerous application areas where High-Tc superconductors are making tremendous impact.
