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Showing 1 to 20 of 163 for “"magnetometer"”.
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Vibrating Sample Magnetometer Instrument Operation Manual
No abstract prepared.
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Development of a Compact Diamond NV- Magnetometer
… development, and analysis of a novel compact NV− magnetometer with a focus on enhancing portability without compromising performance. Motivated by applications in geophysics, biomedical imaging, and materials characterization, this work seeks to bridge the gap be tween academic, laboratory systems …
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A torque magnetometer for crystalline anistropy measurements
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1960
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Terfenol based optical phase modulator and magnetometer
… optic magnetostrictive phase modulators and magnetometers using the highly magnetostrictive rare-earth iron compound Tb<sub>x</sub>Dy<sub>l-x</sub>Fe₂ are investigated. They demonstrated to have a high sensitivity, dynamic range, minimum field detectability, and a better structural …
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Chip-scale atomic magnetometer based on free-induction-decay
… implementation of an optically pumped caesium magnetometer containing a 1:5mm thick microfabricated vapour cell with nitrogen buffer gas, operating in a free-induction-decay configuration. This allows us to monitor the free Larmor precession of the spin coherent Cs atoms by separating the pump …
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The characterization of the Analog Devices Inc. (ADI) magnetometer
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Electronic Signal Processing in an Optical Fiber-Based Magnetometer
… field densities. A complete optical fiber based magnetometer system consisting of sensor head, laser source, opto-electronics, signal demodulation circuitry and display is designed, fabricated and tested. Various electronic signal demodulation schemes are discussed. The Quadrature Phase Shifted …
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Development of Magnetometer-Based Orbit and Attitude Determination for Nanosatellites
… examines the feasibility of using low-cost magnetometer measurements as a method of autonomous, simultaneous orbit and attitude determination for the novel application of redundancy on nanosatellites. Extended Kalman Filters (EKFs) are developed for attitude determination and orbit …
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A Biaxial Magneto-optical Kerr Magnetometer for Studying Magnetic Thin Films
… and built a biaxial magneto-optical Kerr magnetometer to study thin magnetic films. The design enables researchers to measure perpendicular and in-plane hysteresis curves of ultra thin films down to a thickness of 9 A. The optical components are fastened to a vibration isolation table and …
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Photonic Crystal Lorentz Force Magnetometer for Out-of-Plane Magnetic Field Sensing
… and wearables. In this work, a Lorentz force magnetometer was designed based on the concept of a photonic crystal directional coupler (PCDC) for magnetic field sensing perpendicular (out-of-plane) to the chip surface. Built on the Silicon-On-Insulator platform, a custom post-processing recipe …
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A magnetometer based payload for a PTOL UAV with application in geophysical surveys
… sensor used to perform these surveys is the magnetometer. The concept of an unmanned aerial vehicle (UAV) has been around since 1915, with the first manufactured UAV appearing in 1916. Subsequent to the realisation of the UAV in the 1950s by Ryan Aeronautical for military reconnaissance, the …
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Low frequency, in-situ vibrating sample magnetometer : electrical systems and control software design
A low frequency vibrating sample magnetometer has been built to measure the in-situ properties of ferromagnetic catalysts. The instrument allows measurements to be taken during an experimental catalyst test run (in-situ). The vibration is performed by a motor crank arrangement frequency of 2 Hz. …
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The feasibility of the use of Overhauser effect in a nuclear free precession magnetometer.
Nuclear Free Precession Magnetometers have been in use since the first successful one was built in 1954. These magnetometers, used to measure the magnitude of the Earth's magnetic field, operate on the relationship that exists between the magnitude of the environmental magnetic field and the …
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Low Cost Magnetometer Calibration and Distributed Simultaneous Multipoint Ionospheric Measurements from a Sounding Rocket Platform
<p>Low-cost and low-size-weight-and-power (SWaP) magnetometers can provide greater accessibility for distributed simultaneous measurements in the ionosphere, either onboard sounding rockets or on CubeSats. The Space and Atmospheric Instrumentation Laboratory (SAIL) at Embry-Riddle Aeronautical …
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Nanoscale magnetometry with a microcontroller-based magnetometer using a single nitrogen-vacancy defect in nanodiamond
… with its nanometric scale, allows building nanomagnetometers that work simply by probing the electronic ground state by Optically Detected Magnetic Resonance (ODMR). In the present work, an ODMR−based system for performing nanomagnetometry was developed using an Arduino Due board microcontroller …
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Integration and characterization of a control and signal processing system for a SERF magnetometer array
Interest in the development of ultrasensitive magnetometers is driven by applications in a variety of areas, including magnetoencephalography (MEG), magnetic anomaly detection (MAD), dynamic measurements of geomagnetic fields, and MRI signal detection. While numerous architectures are being pursued …
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A Measure of the Hurst Exponent Variability on Ground Based Magnetometer Data for Quiet and Active Magnetospheric Periods
<p>Ground-based magnetometer data were analyzed for the period of 1991-2001. The data were classified into periods of quiet and active magnetospheric activity. Those periods classified as quiet required that Kp < 1 for not less than 48 consecutive hours and active periods required a Kp > 4 for not …
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Development of ground-based search -coil magnetometer systems in the polar regions and studies of ULF Pc 1--2 wave propagation in the ionospheric waveguide
<p>Search-coil magnetometers, which measure time-varying magnetic flux density (dB/dt) and its direction, have been developed for the observations of geomagnetic pulsations in the ultra low frequency (ULF) range (a few mHz to a few Hz). The design, fabrication, and test/calibration have been …
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Magnetic properties of lithographically patterned thin film magnetic elements for magnetic random access memory applications
… using magnetic force microscopy (MFM), SQUID magnetometer, alternating gradient magnetometer (AGM) and vibrating sample magnetometer (VSM). The measured results have been compared with the theoretical shape anisotropy theory to try finding a guideline for controlling magnetic properties of …
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