Magnetometer comprising a sensor crystal

A magnetometer for detecting a magnetic field, comprising:

• an excitation light source configured to emit an excitation beam;
• a sensor crystal that includes at least one magneto-optical defect;
• a device configured to generate a microwave field,
• wherein the sensor crystal, the device configured to generate the microwave field and the excitation light source are configured and disposed relative to one another such that the excitation light beam emitted by the excitation light source causes an emission of fluorescence radiation in the at least one magneto-optical defect of the sensor crystal, and the microwave field in the sensor crystal can be detected;
• a detector which is configured and disposed such that the detector detects the emitted fluorescence radiation;
• at least two permanent magnets which are disposed and configured such that the at least two permanent magnets generate an at least approximately homogenous static magnetic field in the sensor crystal,
• wherein the sensor crystal and the at least two permanent magnets are disposed on a common positioning element.

A method for operating a magnetometer, the method comprising:

• providing the magnetometer, the magnetometer including:
• an excitation light source configured to emit an excitation beam,
• a sensor crystal that includes at least one magneto-optical defect,
• a device configured to generate a microwave field,
• wherein the sensor crystal, the device configured to generate the microwave field and the excitation light source are configured and disposed relative to one another such that the excitation light beam emitted by the excitation light source causes an emission of fluorescence radiation in the at least one magneto-optical defect of the sensor crystal, and the microwave field in the sensor crystal can be detected,
• a detector which is configured and disposed such that the detector detects the emitted fluorescence radiation,
• at least two permanent magnets which are disposed and configured such that the at least two permanent magnets generate an at least approximately homogenous static magnetic field in the sensor crystal,
• wherein the sensor crystal and the at least two permanent magnets are disposed on a common positioning element;
• and
• operating the magnetometer.