Download or read book Transient Behaviour of ITER Poloidal Field Coils written by Alexander Winkler and published by KIT Scientific Publishing. This book was released on 2014-08-18 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transient voltages occur on the terminals of superconducting coils and may lead to internal over-voltages. The main objective of this work was to calculate the transient electrical behaviour and internal voltage distribution within the ITER poloidal field (PF) coils at four scenarios and was made using the PF 3 and PF 6 coils as examples. The calculated maximum voltages will be used for definition of amplitudes and voltage waveforms for the tests of the high-voltage insulation of the coils.

Download or read book Transient Behaviour of ITER Poloidal Field Coils written by Alexander Winkler and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of High Temperature Superconductor Cables for Magnet Toroidal Field Coils of the DEMO Fusion Power Plant written by Bayer, Christoph M. and published by KIT Scientific Publishing. This book was released on 2017-02-16 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Development of an Air Coil Superconducting Fault Current Limiter written by Naeckel, Oliver and published by KIT Scientific Publishing. This book was released on 2016-11-14 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrical power grids are the lifeline of technical infrastructure and fundamental for industry and modern lives. Fault Currents can disrupt the continuous supply of electrical energy, cause instable grid conditions and damage electrical equipment. The Air Coil Superconducting Fault Current Limiter (AC-SFCL) is a measure to effectively limit fault currents. The concept is investigated and proven experimentally by designing, building and successfully testing a 60 kV, 400 V, z = 6% demonstrator.

Download or read book Optimization of Hot Electron Bolometers for THz Radiation written by Axel Stockhausen and published by KIT Scientific Publishing. This book was released on 2014-07-20 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hot-electron bolometers are fast and low noise radiation detectors which can be used for many different applications. The aim of this work was to optimize the fabrication process of hot-electron bolometers and gain a deeper understanding of the underlying processes. To achieve this, the fabrication of the superconducting thin films was optimized and the superconducting properties of the films were analyzed. Detectors fabricated using the results showed a record value for the noise temperature.

Download or read book Ultra fast YBa2Cu3O7 x Direct Detectors for the THz Frequency Range written by Petra Thoma and published by KIT Scientific Publishing. This book was released on 2014-07-28 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Development of lumped element kinetic inductance detectors for mm wave astronomy at the IRAM 30 m telescope written by Rösch, Markus and published by KIT Scientific Publishing. This book was released on 2014-01-21 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis studies the development of LEKID arrays for the use in a mm-wave camera for the IRAM 30m telescope. This includes the design and fabrication of the superconducting microresonators, the modeling and optimization of the mm-wave coupling to the detector and the characterization of the arrays at low temperatures. The results obtained brought IRAM to test a prototype instrument at the telescope, where first astronomical results have been achieved, which are also presented in this work.

Download or read book Real time imaging systems for superconducting nanowire single photon detector arrays written by Hofherr, Matthias and published by KIT Scientific Publishing. This book was released on 2014-09-26 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superconducting nanowire singe-photon detectors (SNSPD) are promising detectors in the field of applications, where single-photon resolution is required like in quantum optics, spectroscopy or astronomy. These cryogenic detectors gain from a broad spectrum in the optical and infrared range and deliver low dark count rates and low jitter times. This thesis improves the understanding of the detection mechanism of SNSPDs and intodruces new and promising multi-pixel readout concepts.

Download or read book Influence of Material and Geometry on the Performance of Superconducting Nanowire Single Photon Detectors written by Henrich, Dagmar and published by KIT Scientific Publishing. This book was released on 2014-07-28 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Superconducting Nanowire Single-Photon Detectors offer the capability to detect electromagnetic waves on a single photon level in a wavelength range that far exceeds that of alternative detector types. However, above a certain threshold wavelength, the efficiency of those detectors decreases stronlgy, leading to a poor performance in the far-infrared range. Influences on this threshold are studied and approaches for improvement are verified experimentally by measurement of the device performance.

Download or read book Systems Approaches to Nuclear Fusion Reactors written by Frederick B. Marcus and published by Springer Nature. This book was released on 2023-01-01 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an overall review, applying systems engineering and architecture approaches, of the design, optimization, operation and results of leading fusion experiments. These approaches provide a unified means of evaluating reactor design. Methodologies are developed for more coherent construction or evaluation of fusion devices, associated experiments and operating procedures. The main focus is on tokamaks, with almost all machines and their important results being integrated into a systems design space. Case studies focus on DIII-D, TCV, JET, WEST, the fusion reactor prototype ITER and the EU DEMO concept. Stellarator, Mirror and Laser inertial confinement experiments are similarly analysed, including reactor implications of breakeven at NIF. The book examines the engineering and physics design and optimization process for each machine, analysing their performance and major results achieved, thus establishing a basis for the improvement of future machines. The reader will gain a broad historical and up-to-date perspective of the status of nuclear fusion research from both an engineering and physics point of view. Explanations are given of the computational tools needed to design and operate successful experiments and reactor-relevant machines. This book is aimed at both graduate students and practitioners of nuclear fusion science and engineering, as well as those specializing in other fields demanding large and integrated experimental equipment. Systems engineers will obtain valuable insights into fusion applications. References are given to associated complex mathematical derivations, which are beyond the scope of this book. The general reader interested in nuclear fusion will find here an accessible summary of the current state of nuclear fusion.

Download or read book Fluorescent thermal imaging method for investigating transient effects in high temperature superconductor tapes and coils written by Gyuráki, Roland and published by KIT Scientific Publishing. This book was released on 2022-02-24 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Magnetization of High Temperature Superconducting Trapped Field Magnets written by Zou, Shengnan and published by KIT Scientific Publishing. This book was released on 2017-12-01 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical field sensitive YBa Cu O detectors for real time monitoring of picosecond THz pulses written by Raasch, Juliane and published by KIT Scientific Publishing. This book was released on 2019-04-23 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimisation of hysteretic losses in high temperature superconducting wires written by Krueger, Philipp and published by KIT Scientific Publishing. This book was released on 2014-05-15 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hysteretic loss optimisations through numerical simulation and subsequent experimental confirmation in transport current and background field measurements: ferromagnetic shielding and topological geometry optimisation is used to reduce energy dissipation in HTS coated conductor geometries. Single tapes and coil geometries are investigated. A 3D model capable of taking into account contact resistances is also presented for the Twisted Stacked Tape Conductor cable.

Download or read book Research and Technology Development on Superconducting Current Limiting Transformers written by Hellmann, Sebastian and published by KIT Scientific Publishing. This book was released on 2020-01-10 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear fusion current lead High Temperature Superconductor Numerical simulation Computational thermal Fluid Dynamics written by Rizzo, Enrico and published by KIT Scientific Publishing. This book was released on 2014-03-27 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Superconducting integrated THz receiver written by Merker, Michael and published by KIT Scientific Publishing. This book was released on 2019-12-17 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: