A cesium optical pump magnetometer probe

Abstract

The invention discloses a probe of caesium optical pumping magnetic force device. The probe comprises an atom absorption chamber, a photocell, at least three light passing windows and a caesium spectrum lamp. The atom absorption chamber has a spherical housing filled with atom gas. Outer magnetic field is measured through the optical pump effect generated by the mutual function of 894nm monochromatic light emitted by the caesium spectrum lamp and the atom gas. An exciting coil is wound on the atom adsorption chamber. The photocell is arranged in way of being tangent to the spherical housing of the atom absorption chamber, and is used for detecting light emitted out by the pump light through the atom absorption chamber. The light passing windows are uniformly wound around the spherical housing. Each light passing window is connected with a cylindrical optical channel to form a path of optical axis. The opening direction of each optical channel faces one side which is arranged opposite to the spherical housing, of the photocell. The included angles of adjacent two optical axes are equal. The light emitted out by the caesium spectrum lamp passes through a combined lens to become monochromatic dextrorotation circularly polarized light, and then is irradiated to the photocell after passing through the atom absorption chamber. The provided probe is free from dead angle in working region, small in size and low in energy consumption.

Description

technical field [0001] The invention relates to the technical field of magnetic field detection instruments, in particular to a probe of a cesium optical pump magnetometer. Background technique [0002] The cesium optical pump magnetometer is a kind of optical detection magnetic resonance magnetometer, which can work under the geomagnetic field. The commercial cesium optical pump magnetometer works in the light excitation mode. For a single probe, when the external magnetic field is at a certain angle to the pump light irradiation direction (i.e. the optical axis) of the cesium absorption chamber in the optical pump, the cesium optical pump probe has no signal output, resulting in the cesium optical pump magnetometer not working. The angular region of operation is called the dead zone. Such as figure 1 As shown, the cesium optical pump magnetometer has two dead zones. If the horizontal direction is 0°, the optical axis direction is 90°. ~90° are called the equator dead zo...

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Problems solved by technology

But this method needs 3 sets of independent probes, that is, 3 cesium absorption chambers, 3 photoelectric devices, etc., resulting in the volume, weight and power consumption of the cesium optical pump magnetometer composed of the probes are also very large

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