Abstract: A sensor unit for detecting a magnetic field is disclosed. The sensor unit includes (i) a light source for generating excitation light, (ii) at least one first sensor for determining a measurement signal of an object, and (iii) a second sensor for determining a background magnetic field. The first sensor is designed as a diamond-based NV magnetometer and includes a highly sensitive diamond having at least one negatively charged NV center that has a fluorescent effect and thus emits fluorescence.

Abstract: The disclosure relates to a method for calibrating a sensor component with a calibration model, said method comprising: applying an acting physical variable and at least one disturbance variable to the sensor component; and acquiring training data sets at a plurality of evaluation times, wherein a training data set at each evaluation time is acquired by: providing a value for the physical variable acting on the sensor component and a corresponding desired sensor variable, which is intended to represent the value of the physical variable acting on the component; acquiring an electrical measured variable representing the physical variable; acquiring the at least one disturbance variable; and training the calibration model with the training data sets so that said model maps the at least one disturbance variable to calibration parameters, wherein a difference between the desired sensor variable and the sensor variable is used as a loss function.

Abstract: A method is for measuring phase currents of a device under test, in particular of an inverter, in which a sensor arrangement, which has a component including a crystal lattice with a defect, is arranged in a region of the device under test. The method includes using the sensor arrangement to detect a magnetic field formed by a vector of magnetic fields, the magnetic fields each in turn being brought about by one of the phase currents of the device under test, and calculating a vector of the phase currents from the vector of the magnetic fields based on a coefficient matrix.

Abstract: A method of sequencing a prepared DNA strand includes providing the prepared DNA strand with nucleotides of the types dATP, dCTP, dGTP and/or dTTP, wherein at least one of the types of the nucleotides comprises a predetermined magnetic label. The method further includes placing the prepared DNA strand within a measuring range of a sensor unit comprising an operatively connected magneto-optical transducer unit and an optical sensor and optically exciting the magneto-optical transducer unit. The method continues with acquiring at least one value indicative of a fluorescence signal of the magneto-optical transducer unit, and assigning the acquired value to the at least one type of the nucleotides comprising the predetermined magnetic label.

Abstract: A method for ascertaining a change in a spatial orientation of a nuclear magnetic resonance (NMR) gyroscope having a diamond doped with color centers includes applying a static external magnetic field in a first direction, polarizing a nuclear spin of the color centers of the diamond in a direction of the static magnetic field, and generating a cophasal Larmor precession of the nuclear spin of the color centers of the diamond through application of an alternating magnetic field in a second direction perpendicular to the first direction, whose frequency corresponds to the Larmor frequency of the nuclear spin of the color centers. The method further includes measuring a phase of the Larmor precession, and ascertaining a change in the spatial orientation in a plane perpendicular to the first direction based on a deviation of the precession frequency from an expected value.

Abstract: A method for ascertaining a change in a spatial orientation of a nuclear magnetic resonance (NMR) gyroscope having a diamond doped with color centers includes applying a static external magnetic field in a first direction, polarizing a nuclear spin of the color centers of the diamond in a direction of the static magnetic field, and generating a cophasal Larmor precession of the nuclear spin of the color centers of the diamond through application of an alternating magnetic field in a second direction perpendicular to the first direction, whose frequency corresponds to the Larmor frequency of the nuclear spin of the color centers. The method further includes measuring a phase of the Larmor precession, and ascertaining a change in the spatial orientation in a plane perpendicular to the first direction based on a deviation of the precession frequency from an expected value.