Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"superconducting magnets"”.
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The computer simulation of quenching in superconducting magnets
… describes the reversion of an operating superconducting magnet to its normally resistive state. This involves change the conversion of stored magnetic energy to heat. It is usually accompanied by the generation of high temperatures, voltages and stresses, because of the large amount of …
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Impact of vibration-induced disturbances on superconducting magnets
… (maglev) systems, the interaction between the superconducting magnets (SCMs) and the discrete ground coils causes electromagnetic and mechanical vibrations. These disturbances limit the performance of the maglev, as occurred in the Japanese MLU002 maglev. Here I examine how the electromagnetic …
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Spontaneous brillouin scattering quench diagnostics for large superconducting magnets
Large superconducting magnets used in fusion reactors, as well as other applications, need a diagnostic that can non-invasively measure the temperature and strain throughout the magnet in real-time. A new fiber optic sensor has been developed for these long-length superconducting magnets that …
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Acoustic emission instrumentation system for monitoring large superconducting magnets
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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Theory and modelling of quench in cable-in-conduit superconducting magnets
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1994.
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Superconducting Magnets for Small Scale Energy Storage Systems and Electrodynamic Magnetic Levitation Systems
Made available in DSpace on 2017-07-06T18:42:34Z (GMT). No. of bitstreams: 3 Burkhardt_Earle_E_MS.pdf: 52600237 bytes, checksum: 4dc3ce1cf155bae415e5062ed42a37a5 (MD5) Burkhardt_Earle_E_MS_ABS.pdf: 1290951 bytes, checksum: fea9819e444f904e0a6f8038bbc97c33 (MD5) license.txt: 4813 bytes, checksum: …
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Dynamic Resistance of High-Tc Superconductor and Its Application in Flux Pumped Superconducting Magnets
… DC current with little power loss. Hence, superconducting magnets are already widely used in areas such as magnetic resonance imaging (MRI), particle accelerators, and magnetic levitation systems. Flux pumping is a promising technology for energizing and operating High-Tc superconducting …
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Optimization of transverse resistivity for increased stability in ramped cable-in-conduit superconducting magnets
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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A design flux injector for NMR superconducting magnets : results of operation with superconducting insert cells
… (HTS) are critical for the construction of NMR magnets generating 1 GHz and above. Such systems generally require an HTS insert to be placed in the inner high-field region of a low temperature superconducting (LTS) magnet. Among the problems in the presently available HTS technology are splice …
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Development of an integrated platform for the multi-physics simulation of superconducting magnets for fusion applications
L'abstract è presente nell'allegato / the abstract is in the attachment
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An investigation into a flux-pumped high-temperature superconducting MRI system
… have been studied including high-field magnets, Magnetic Resonance Imaging (MRI) magnets, fusion magnets, superconducting fault current limiters, energy storage devices, and many others. Among all of the applications, MRI magnets make up the major part of the commercial application of …
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A New Method for Cryogenic Fluid Thermal Conductivity Measurements and Thermophysical and Transport Properties of Hydrogen-Helium Mixtures
New high field, high temperature superconducting magnets for fusion applications can operate at temperatures up to 65 K, well above those of low temperature superconducting magnets. These higher temperatures allow for the consideration of hydrogen as a magnet coolant, either pure or as a mixture …
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Nmr Studies of Compressed Supercritical Water and Proton Exchange in Compressed Liquid Water
… design for loading high pressure NMR probes into superconducting magnets. The second is the design of a variable temperature (-50 to 1000(DEGREES)C) NMR probe. The relaxation times of Na('+) in NaCl(l) are also reported in this appendix.
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Mechanical and electromagnetic transverse load effects on superconducting niobium-tin performance
… typical geometry for the conductor employed in superconducting magnets for fusion applications. Once energized, the magnets produce an enormous electromagnetic force and very large transverse loads are applied against the strands. This large force results in a degradation of the performance of …
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Development of an experiment to study the effects of transverse stress on the critical current of a niobium-tin superconducting cable
Superconducting magnets will play a central role for the success of the International Thermonuclear Experimental Reactor (ITER). ITER is a current driven plasma experiment that could set a milestone towards the demonstration of fusion as a source of energy in the future. Cable-in-Conduit is the …
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Development of HTS Transformer-Rectifier Flux Pumps
High Temperature Superconductor (HTS) magnets are enabling components for many valuable applications including medical imaging and fundamental physics research. One major inconvenience of using superconducting components is the need to cool them to a very low temperature, and once at this low …
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Zero Quantum Nuclear Magnetic Resonance experiments utilizing a toroid cell and coil
… NMR instruments. With the advent of the superconducting magnets the popularity shifted to the Helmholtz coil, which remains the most common coil today for superconducting magnets. The Helmholtz coil, however, has been shown to have lower sensitivity than the solenoid coil. Hoult (1) has …
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New considerations for compact cyclotrons
A compact cyclotron built with superconducting magnets could be a transformative solution to many scientific problems facing the defense, medical, and energy industries today. This thesis discusses three potential applications of compact cyclotrons: generation of ¹³ for medical imaging, active …
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Handheld MRI for Point-of-Care and Educational Applications
… (RF) shielded rooms and liquid helium-cooled superconducting magnets. Permanent magnet arrays present as a lowcost and portable alternative for point-of-care and educational MR applications, while sacrificing in image quality. This work focuses on the following contributions: (1) the …
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Active lubricant-impregnated surfaces
… to be magnetic, and requires enormous fields of superconducting magnets when transitioning to diamagnetic materials such as water. This thesis presents a new class of active surfaces by impregnating active fluids such as ferrofluids into a textured surface. Droplets on such ferrofluid-impregnated …
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