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 10 of 10 for “"Helmholtz coil"”.
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Design and construction of a Helmholtz coil apparatus for nanoparticle heating
… a radio frequency magnetic field generated by a coil. Currently, researchers monitor the effectiveness of this heating with UV/Visible spectroscopy. However, fluorescence spectroscopy would provide a more sensitive and versatile way to monitor the effects of magnetic heating. By using a Helmholtz …
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Zero Quantum Nuclear Magnetic Resonance experiments utilizing a toroid cell and coil
… experiment. However, only two kinds of detector coils have been typically used in NMR studies. These are the solenoid coil and the Helmholtz coil. The solenoid coil was very popular with the permanent and electromagnet NMR instruments. With the advent of the superconducting magnets the popularity …
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Magnetic Field Shielding For the Forward Time of Flight Upgrade At Jefferson National Lab
… types of magnetic shielding methods using a Helmholtz Coil to provide varying field strengths. Photomultiplier tubes with magnetic shielding built in supply the necessary shielding for the strengths expected at Jefferson Lab, though there are still other options available if need be.</p>
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Photonic Crystal Lorentz Force Magnetometer for Out-of-Plane Magnetic Field Sensing
… at the micron scale. A modified version of a Helmholtz coil was also designed and constructed to facilitate precise out-of-plane magnetic field measurements to characterize the sensor performance. The resulting magnetometer designed here is highly sensitive with a detection limit of …
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A novel magnetic field approach to simulate spacecraft attitude determination and control
… 3-axis attitude control via magnetic torque coils and attitude determination via Kalman-filtered magnetometer data with an optional Sun vector measurement. This innovative new attitude determination and control (ADC) method is more sophisticated than those traditionally employed on CubeSats …
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Energy deposition into heavy gas plasma via pulsed inductive theta-pinch
… into plasma via formation in a theta pinch coil. To aid in this research, the Missouri Plasmoid Experiment Mk. I (and later Mk. II) was created.</p> <p>In the first paper, the construction of differential magnetic field probes are discussed. The effects of calibration setup on B-dot probes …
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Single-sided magnetic nanoparticles imaging scanner for early detection of breast cancer
Electromagnetic coils form the basis of magnetic particle imaging (MPI) scanners. Previous scanner designs employ Helmholtz coil arrangement which has low sensitivity and high cost of fabrication. Furthermore, the scanners have long signal acquisition time and high memory requirement. This research …
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Engineering Considerations for Treatment of Prosthetic Joint Infections Using Alternating Magnetic Fields (AMF)
… this thesis, first an AMF system with a solenoid coil was constructed for targeting a metal plate surgically implanted in a sheep model. The system produced magnetic field strengths up to 12 mT and achieved plate temperatures of 65-80°C within 10-14 seconds. A tissue-mimicking phantom of the sheep …
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Microstructural formations and phase transformation pathways in tantalum carbides
… load on a test bar specimen. The electromagnetic Helmholtz coil can be used to independently control the magnetic flux, or load, while adjusting the specimen current for resistive heating of the specimen. The coils and specimen were encased in a stainless steel chamber that controlled the testing …
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Fully Distributed Multi-Material Magnetic Sensing Structures for Multiparameter DAS Applications
… controlled through a solenoid and rectangular Helmholtz coil, both built in-house. A three-dimensional magnetic field vector sensor was proposed due to the success of the magnetic field sensor, and a design was proposed and initially tested to validate direction as a function of field strength …