Search results for "Gradiometer"

showing 3 items of 3 documents

Magnetic Field Gradiometer with Sub-Micron Spatial Resolution Based on Caesium Vapour in an Extremely Thin Cell

2015

Abstract In this paper we present a device for measuring the magnetic field and its gradient with a spatial resolution of several hundred nanometres. This device is based on caesium metal vapour confined to an extremely thin cell (ETC). To measure magnetic signals, we use absorption and very low laser powers, which might be appealing for modern fabrication techniques. A portable, fully automated device was constructed.

Materials sciencebusiness.industryMagnetometerGeneral EngineeringGeneral Physics and Astronomychemistry.chemical_elementGradiometerlcsh:QC1-999Magnetic fieldlaw.inventionmeasurements of magnetic field gradientOpticschemistrylawCaesiummagnetometermagneto-optical resonancesextremely thin cellbusinessImage resolutionlcsh:PhysicsLatvian Journal of Physics and Technical Sciences
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Magnetic Gradiometer for Detection of Zero- and Ultralow-Field Nuclear Magnetic Resonance

2019

Magnetic sensors are important for detecting nuclear magnetization signals in nuclear magnetic resonance (NMR). As a complementary analysis tool to conventional high-field NMR, zero- and ultralow-field (ZULF) NMR detects nuclear magnetization signals in the sub-microtesla regime. Current ZULF NMR systems are always equipped with high-quality magnetic shieldings to ensure that ambient magnetic field noise does not dwarf the magnetization signal. An alternative approach is to separate the magnetization signal from the noise based on their differing spatial profiles, as can be achieved using a magnetic gradiometer. Here, we present a gradiometric ZULF NMR spectrometer with a magnetic gradient …

PhysicsField (physics)Atomic Physics (physics.atom-ph)Zero (complex analysis)General Physics and AstronomyFOS: Physical sciences02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesNoise (electronics)Chirality (electromagnetism)Gradiometer3. Good healthMagnetic fieldPhysics - Atomic PhysicsNuclear magnetic resonance0103 physical sciencesFundamental physicsCondensed Matter::Strongly Correlated Electrons010306 general physics0210 nano-technologyAtomic magnetometer
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Magnetic imaging of a late Bronze Age tumulus in France before and during excavation

2002

Geophysical surveying is taking place in the Chatillon-sur-Seine area in France to examine and map prehistoric settlements and the structure of tumuli (grave-mounds which originally reached a height of up to 5 m but which are now almost level). The magnetic survey discussed here was conducted to detect archaeological structures within a late La Tene (100-50 bce) necropolis, in particular the preexcavation recording of a late Bronze Age round barrow. During the excavation, additional surveys were carried out to analyze the influence of immediate subsurface soil layers on the magnetic anomalies originating from the deeper archaeological features. Additional radar surveys made use of a 500 MHz…

PrehistoryGeophysicsEarth's magnetic fieldBronze AgeGeologyExcavationMagnetic anomalyMagnetic surveyArchaeologyTumulusGeologyGradiometerThe Leading Edge
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