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.
Results
Showing 1 to 13 of 13 for “"Magnet design"”.
-
Magnet design considerations for superconductive magnetic energy storage
Superconducting Magnetic Energy Storage (SMES) offers many advantages over conventional forms of energy storage. The higher unit costs of SMES make it economically feasible only for large-scale applications (5000 MWh or more). Early studies showed that low aspect ratio solenoids have the lowest …
-
New approaches to diagnostic imaging: Magnetic particle imaging for human functional neuroimaging and short mid-field MRI magnet design
Part I: Magnetic Particle Imaging for Human Functional Neuroimaging While Magnetic Resonance Imaging (MRI) has revolutionized diagnostic imaging since its clinical introduction in the 1980s — primarily focusing on hydrogen nuclei — it remains fundamentally limited by the weak nature of nuclear spin …
-
Analysis of Cryogenic Cooling of Toroidal Field Magnets for Nuclear Fusion Reactors
… temperatures on the order of 20 K allow the magnets to operate under signifi cant thermal loads during the fusion process. As a case study, we look at the proposed SPARC toroidal field (TF) magnet design. We investigate the heat transfer inside the cooling channels and uid dynamics inside the …
-
Characterization of Nb₃Sn superconducting strand under pure bending
… scaling laws which are used for superconducting magnet design. However, the strain state of the strand in an actual magnet winding is often a complicated combination which includes uniaxial tension or compression, bending, and transverse compression. A bending mechanism was designed and used to …
-
Modeling and characterization of a voice coil motor
… needle-free injection device. The chosen motor design features opposing magnets whose flux is channeled across the air gap by a center radial magnet, thus creating a higher flux density in the gap compared to a one-magnet design. An analytical model is developed which gives the force of the …
-
Handheld MRI for Point-of-Care and Educational Applications
Magnetic Resonance Imaging (MRI) is a powerful, non-invasive imaging modality for visualizing the body’s internal anatomy and providing contrast between soft tissues. However, the reach of clinical MRI scanners is limited by their expensive infrastructure (millions of USD), including radiofrequency …
-
Portable low-cost magnetic resonance imaging
… a rotating lightweight, cryogen-free, low-field magnet. When rotated about the object, an inhomogeneous magnetic field pattern is used as a rotating Spatial Encoding Magnetic field (rSEM) to create generalized projections and encode the iteratively reconstructed 2D images. Multiple receive …
-
Design of demountable toroidal field coils with REBCO superconductors for a fusion reactor
… could be a revolutionary development for magnetic fusion. REBCO has significantly better performance at high magnetic fields than traditional low temperature superconductors (LTS), and can be operated at a higher temperature than LTS for reduced thermodynamic cost of cooling. Use of REBCO …
-
Studies in positron and gamma ray production for future facilities
… associated with the production of positrons is designing a production target that will survive in an intense photon beam while rotating at high speeds to spread out the energy from the beam. In the first part of this thesis I present a solution to a torque problem affecting the positron …
-
Non-destructive characterization of materials by single-sided NMR
… in cross-linked elastomers. A special magnet design that fits a stress-strain device has been used for complementary investigation of a series of different rubber stripes during mechanical testing. Such a setup promises to be of great use for predicting the time of failure based on NMR …
-
Evaluation of Novel Laser-Skived Microbridges for Improved Characterization of REBCO Superconductor
… a new generation of large-scale superconducting magnets operating at magnetic fields in excess of 20 T. Characterizing REBCO tape current as a function of temperature (T), magnetic field (B), and magnetic field angle (ϕ) is an essential activity for providing magnet design and operational data as …
-
Study of Second Generation High Temperature Superconductors: Electromagnetic Characteristics and AC Loss Analysis
… Superconductors, which covers their electromagnetic characteristics and AC loss analysis. Lorentz Force Electrical Impedance Tomography (LFEIT) is one of the most promising hybrid diagnostic scanners with burgeoning potential for biological imaging, particularly in the detection of cancer …
-
DESIGN AND STUDY OF THE IRIS 10 T ENERGY SAVING DIPOLE MAGNET FOR ACCELERATORS: ESMA
… in 1987, tape manufacturing suitable for magnet windings has only recently been optimized. REBCO tapes belong to the class of High Temperature Superconductors (HTS), a class of materials which remain superconducting at temperatures higher than liquid nitrogen, in contrast to classical Low …