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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.
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Heat resistant materials --- Refractory materials --- Materials at high temperatures --- High temperature materials --- Materials --- High temperatures --- Strength of materials --- high-temperature applications --- oxidation and environmental attack --- high-temperature corrosion --- design with high-temperature materials --- processes for achieving high temperature --- solidification processes
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This book is a collection of the chapters intended to study only practical applications of HTS materials. You will find here a great number of research on actual applications of HTS as well as possible future applications of HTS. Depending on the strength of the applied magnetic field, applications of HTS may be divided in two groups: large scale applications (large magnetic fields) and small scale applications (small magnetic fields). 12 chapters in the book are fascinating studies about large scale applications as well as small scale applications of HTS. Some chapters are presenting interesting research on the synthesis of special materials that may be useful in practical applications of HTS. There are also research about properties of high-Tc superconductors and experimental research about HTS materials with potential applications. The future of practical applications of HTS materials is very exciting. I hope that this book will be useful in the research of new radical solutions for practical applications of HTS materials and that it will encourage further experimental research of HTS materials with potential technological applications.
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The slow growth of power transmission systems relative to the demand for power in the US has played a role in higher electricity prices. This text evaluates the potential of high-temperature superconducting power technologies to address problems in the electric power transmission grid.
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This work concerns the characterization of high-temperature superconducting REBCO Roebel cables for use in accelerator magnets. The effects of bending, torsion and compressive stress on the cable are investigated. The second part concerns the effect of inter-strand resistance on the cable properties. A two-parameter model is proposed to describe inter-strand connections and predict the effect on AC loss and stability. Additionally, the AC loss and stability are experimentally investigated.
Hochtemperatursupraleiter --- REBCO coated conductor --- High-temperature superconductor --- Hochfeldmagnete --- REBCO-Bandleiter --- Roebelkabel --- high-field magnets --- Roebel cable
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Techniques based on numerical simulations have been applied to the analysis of the heat exchanger and the High Temperature Superconductor (HTS) module of HTS current leads. In the first case correlations have been derived for the meander flow geometry. In the second case steady state and transient thermal-electric models have been validated. Both techniques are used to design and optimize HTS current leads. The correlations were applied to a predictive analysis of the ITER HTS current leads.
current lead --- Nuclear fusion --- High Temperature Superconductor --- Computational thermal Fluid Dynamics --- Numerical simulation
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For the analysis and optimization of the picosecond pulsed terahertz radiation generated by electron storage rings or other pulsed sources, ultra-fast detectors are required which are able to resolve picosecond dynamic processes directly in the time domain. In this book, a new direct terahertz detector technology based on the high-temperature superconductor YBa2Cu3O7-x has been developed which opens new routes in the analysis of picosecond time-domain processes with a wide dynamic range.
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Nuclear fusion is a key technology to satisfy the basic demand for electric energy sustainably. The official EUROfusion schedule foresees a first industrial DEMOnstration Fusion Power Plant for 2050. In this work several high temperature superconductor sub-size cables are investigated for their applicability in large scale DEMO toroidal field coils. Main focus lies on the electromechanical stability under the influence of high Lorentz forces at peak magnetic fields of up to 12 T.
Magnet toroidal field coil --- Nuclear fusion --- HochtemperatursupraleitungDEMO Reactor --- Kernfusion --- High temperature superconductors --- DEMO Reaktor --- Toroidalfeldspulen
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The present work investigates neutron-irradiated EUROFER97 by high-temperature indentation. Before, a test procedure is defined for the prototype device Karlsruhe high-temperature indenter. The procedure leads to a quality of the test results at high temperatures comparable to commercial devices at room temperature. The results contribute to a better understanding of structural materials of future fusion reactors.
Mechanical engineering & materials --- Fusion --- Strukturmaterialien --- Härte --- Neutronenschäden --- Hochtemperatur --- Hardness --- High-temperature --- structural materials --- Neutron-induced defects
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This work presents the development and application of high-speed fluorescent thermal imaging for quench analysis in high-temperature superconductors (HTS). Using a fluorescent coating, with a temperature-dependent light emission, temperature changes can be calculated over 2D surfaces. The technique uncovered peculiar transient effects in novel HTS tape architectures and also helped to verify and better understand hot spot development in both insulated and non-insulated, HTS–wound pancake coils.
Electrical engineering --- Supraleiter --- Hochtemperatursupraleiter --- Wärmeaufnahme --- Quench --- superconductivity --- high-temperature superconductors --- thermal imaging --- quench --- normal zone propagation
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