Abstract: A parametric resonance magnetometer is provided comprising a cell filled with an atomic gas; an optical pumping source arranged to emit a light beam in a direction of the cell; a polarization device configured so that by the effect of the light beam, the atomic gas simultaneously acquires a state aligned according to an alignment direction and a state oriented according to an orientation direction; a parametric resonance excitation source configured to generate a radiofrequency magnetic field in the cell; and a device to detect parametric resonances and to measure an absorption of the light beam by the atomic gas. The parametric resonance excitation source is configured so that the radiofrequency magnetic field consists of two components orthogonal to one another, each oscillating at its natural oscillation frequency. The two components include a component longitudinal to the orientation direction and a component longitudinal to the alignment direction.

Abstract: A device having two mutually spaced sensor loops is provided. The device includes a magnetostrictive sensor structure coupled to a plurality of transmitters and a plurality of receivers, and along which a magnet that is secured to the rotating component moves. Each sensor loop has a shape corresponding to a rotating direction of the rotating component. Two saturation zones are in both sensor loops. Each transmitting element is provided for simultaneously coupling two current pulses in opposite direction into one respective sensor loop. Each receiving element is positioned to receive a reflected pulse by the magnet at the respective saturation zone.

Abstract: A method of using the transverse relaxation rate (R2) of solvent NMR signal to detect filling errors of an alum-containing product in real-time in-line during manufacturing, for example during a fill-finish unit operation. This technique can be used for quality control in vaccine manufacturing to ensure the delivery of the correct concentration of alum-containing product to the product container such as a vial or pre-filled syringe.

Abstract: A magnetostrictive position measuring method determines a time of flight of a magnetostrictive response transmitted through a waveguide. The magnetostrictive response is generated using a target magnet in response to a magnetostrictive excitation. In the method, an electrical response signal containing an indicator of the magnetostrictive response is digitally sampled at a sampling rate to obtain a plurality of samples. An amplitude of each of the plurality of samples within a target frequency range is determined through an analysis of the plurality of samples in a frequency domain. A peak sample from the plurality of samples in the frequency domain corresponding to the magnetostrictive response is identified. The time of flight and a position of the target magnet along the waveguide is determined based on the peak sample.

Abstract: A transducer assembly includes a ring wall, a first arm, a second arm, a magnet, and a Hall effect sensor. The ring wall defines a bore. The first and second arms are disposed within the bore and include first and second proximal and distal ends, respectively. The first and second proximal ends are coupled to and extend from first and second interior locations of the ring wall, respectively. The second interior location is spaced from the first interior location. The magnet is disposed within the bore and is fixedly coupled to the first arm. The Hall effect sensor is disposed within the bore and is fixedly coupled to the second arm. The Hall effect sensor is spaced from the magnet and is configured to detect movement of the magnet resulting from compression of the ring wall. Methods are also provided.

Abstract: The cooling component may include a coolant pipeline component and a load-bearing component. The coolant pipeline component may include multiple flexible coolant pipelines with high thermal conductivity arranged side by side, the multiple coolant pipelines arranged side by side being securely arranged on the load-bearing component in such a way that a coolant liquid intake pipe and liquid output pipe are arranged uniformly in parallel in a serpentine layout without crossing over each other; so that the multiple coolant pipelines can be installed in a close fit with a Z coil of a gradient coil in such a way as to be orthogonal to the Z coil. Aspects of the present disclosure advantageously increase the support roundness of a cooling layer, and further ensure the magnetic field homogeneity of a coil supported thereby.

Abstract: A magnetometer includes an electron spin defect body including a plurality of lattice point defects. A microwave field transmitter is operable to apply a microwave field to the electron spin defect body. An optical source is configured to emit input light of a first wavelength that excites the plurality of lattice point defects of the electron spin defect body from a ground state to an excited state. A first optical fiber has an input end optically coupled to the optical source and an output end. The output end is attached to a first face of the electron spin defect body and is arranged to direct the input light into the first face of the electron spin defect body. A second optical fiber has an output end and an input end. A photodetector is optically coupled to the output end of the second optical fiber.

Abstract: A method and system for estimating parameters of pipes. The method may comprise disposing an electromagnetic (EM) logging tool into a pipe string, creating a log from a first set of one or more measurements, and creating a synthetic model of one or more nested pipes based at least in part on a well plan. The method may further comprise adding a modeled pipe to the synthetic model, estimating one or more parameters of the modeled pipe through model calibration to form a calibrated model, and performing an inversion with the calibrated model to estimate one or more pipe parameters of the pipe string. The system may comprise an electromagnetic logging tool that may comprise a transmitter, wherein the transmitter is a first coil and is operable to transmit an electromagnetic field, and a receiver, wherein the receiver is a second coil and is operable to measure the electromagnetic field.

Abstract: The present disclosure relates to a concept for checking at least one solder joint between a printed circuit board and a current sensor, including: measuring, by means of the current sensor, an electric current through the solder joint; measuring at least one temperature of the current sensor as a function of the electric current; and ascertaining a quality of the solder joint based on the temperature and the electric current.

Abstract: A valve position sensor is described. The valve position sensor includes a sensor housing for placement on a moving component of a valve. A print circuit board assembly is disposed within the housing. The print circuit board assembly includes one or more micro sensors that includes a magnetometer and a gyroscope. A processing unit performs a calibration routine that associates magnetometer data received from the magnetometer with valve position data received from the gyroscope. The processing unit receives data from the magnetometer and compares the received magnetometer data with the calibration data to determine valve position data relating to an estimate of the valve position. A transmitter wirelessly transmits event data including valve position data to an external receiver.

Abstract: A method and system for estimating a pipe property for a plurality of nested pipes. The method may comprise disposing an electromagnetic logging tool in a wellbore. The electromagnetic logging tool may comprise a transmitter disposed on the electromagnetic logging tool and a receiver disposed on the electromagnetic logging tool. The method may further comprise transmitting an electromagnetic field from the transmitter into a pipe string to energize the pipe string with the electromagnetic field thereby producing an eddy current that emanates from the pipe string, measuring the eddy current in the pipe string with the receiver on at least one channel to obtain a plurality of measurements, forming a log from the plurality of measurements, zoning the log into a plurality of zones based at least in part on a well plan, and extracting a representative signal for each zone of the plurality of zones.

Abstract: A magnetic sensor module includes an axially polarized back bias magnet having a body that radially extends from an inner sidewall to an outer sidewall and a bore that defines the inner sidewall. The magnet generates a radially symmetric bias magnetic in-plane field about a center axis in a sensor plane. The magnetic field has a magnetic flux density of substantially zero along the extension of the center axis and at a circumference of a zero-field circle located in the sensor plane, where the circumference of the zero-field circle vertically overlaps with the magnet body in a plan view. The magnetic sensor module includes a magnetic sensor including at least three sensor elements arranged in the sensor plane at locations where the radially symmetric bias magnetic in-plane field has a magnetic flux density of substantially zero, including at least two sensor elements being arranged on the circumference of the zero-field circle.

Abstract: A three-axis vector optically pumped magnetometer includes a cell filled with an atomic gas subjected to an ambient magnetic field the projection of which on three rectangular coordinate axes defines three components thereof, and a photodetector arranged to receive a probe beam that passed through the cell. The photodetector includes a plurality of measurement units arranged in a plane transverse to a direction of propagation of the probe beam, the measurement units each providing a photodetection signal. The magnetometer further comprises a processing unit configured to determine, for each measurement unit and from the photodetection signal, a measurement associated with the measurement unit of each of the three components of the ambient magnetic field; calculate at least one difference between the measurements, associated with different measurement units, of a component of the magnetic field; and deliver a gradiometric measurement signal including the at least one difference calculated.

Abstract: A device for measuring a scalar magnetic field based on pulsed optical pumping, including: a first laser, a first isolator, a first ?/2 waveplate, a first polarizing beam splitter, a first coupler, a first spectrum analyzer, a reflector, an atomic sensor probe, a second ?/2 waveplate, a second polarizing beam splitter, a first photoelectric converter, a second photoelectric converter, a data acquisition system, a second laser, a second isolator, an acousto-optic modulator, a third ?/2 waveplate, a third polarizing beam splitter, a second fiber coupler, a second spectrum analyzer, a ?/4 waveplate and a beam expander. Two planar reflectors are respectively arranged at two sides of the atomic sensor probe and face towards the atomic sensor probe, and are arranged parallel to the pump beam input to the atomic sensor probe.

Abstract: A method of measuring contact resistance at an interface for superconducting circuits is provided. The method includes using a chain structure of superconductors to measure a contact resistance at a contact between contacting superconductor. The method further includes eliminating ohmic resistance from wire lengths in the chain structure by operating below the lowest superconducting transition temperature of all the superconductors in the chain structure. The measurement is dominated by contact resistances of the contacts between contacting superconductors in the chain.

Abstract: A magnetic field measurement system includes at least one magnetometer having a vapor cell, a light source to direct light through the vapor cell, and a detector to receive light directed through the vapor cell; at least one magnetic field generator disposed adjacent the vapor cell; and a feedback circuit coupled to the at least one magnetic field generator and the detector of the at least one magnetometer. The feedback circuit includes a first feedback loop that includes a first low pass filter with a first cutoff frequency and a second feedback loop that includes a second low pass filter with a second cutoff frequency. The first and second feedback loops are configured to compensate for magnetic field variations having a frequency lower than the first or second cutoff frequency, respectively.

Abstract: A method for detecting an error in a bridge sensor which is adapted for measuring a physical parameter. The method comprises biasing a first contact pair of the bridge sensor at least two times in a first direction and at least one time in a second direction opposite to the first direction; while biasing the first contact pair, measuring an output signal on a different contact pair of the bridge sensor, thus obtaining at least three output measurements which are representative for the physical parameter and which are separated by time intervals; combining the output measurements to obtain an output value which is indicative for an error in the bridge sensor, wherein the output measurements which are combined are only those output measurements which are measured when biasing the first contact pair.

Abstract: A transfer device is provided for shuttling an NMR sample container between at least two coaxially arranged NMR magnet systems of an NMR spectrometer comprising a guide tube positioned in a central bore of the magnet systems, a shuttle assembly arranged inside the guide tube for securely holding and shuttling the sample container and a drive system comprising a pulling drive and a winch cord attached to the drive system on one side and to the shuttle assembly on the other side, such that the shuttle assembly can travel inside the guide tube. The transfer device has a pneumatic pressurizing arrangement with an entry for pressurized gas arranged on a gas-tight body above the shuttle assembly that is adapted to maintain the winch cord under tension. The shuttle assembly comprises a piston design being moveable along the common axis of the coaxial magnet systems under the influence of the pressure.

Abstract: A multi-contact Hall plate having four contacts or a multiple of four contacts, wherein each of the contacts is arranged substantially equally distributed along an edge region of the Hall plate, and each of the contacts is connected to one of the four terminals.

Abstract: In an embodiment is provided a method of determining at least one property of a fluid that includes inducing a paramagnetic response from at least one diamagnetic species flowing through a system, the fluid including the at least one diamagnetic species; performing electron paramagnetic resonance (EPR) spectroscopy on at least a portion of the fluid to generate an EPR spectrum; and determining at least one property of the fluid based on the EPR spectrum. In another embodiment is provided a method of determining at least one property of a first fluid that includes introducing an inhibitor composition to a first fluid flowing through a system to form a second fluid; performing EPR spectroscopy on at least a portion of the second fluid to generate an EPR spectrum; and determining at least one property of the second fluid based on the EPR spectrum. Apparatus for determining fluid properties are also provided.