Test device and test method for absorption ratio of absorption chamber of optical pump magnetometer

Abstract

The invention relates to a testing device and a testing method for an absorption ratio of an absorption chamber of an optical pumping magnetometer. The testing device consists of an optical pumping probe, a photosensitive voltage collecting circuit and vacuumizing-inflation equipment, wherein the absorption chamber is fixed on a station of the vacuumizing-inflation equipment; output voltage of a photosensitive element and the absorption ratio of the absorption chamber are measured in real time; pressure of the absorption chamber is regulated on line directly; and the best optical pumping effect is achieved. The testing device changes the fact that the finished absorption chamber is loaded into an optical pumping magnetometer probe, the absorption ratio of the absorption chamber is judged according to a whole effect of the testing probe; and when the whole effect of the probe is not good, a problem of the absorption chamber cannot be determined. Materials and time are wasted, and a manufacturing period of the magnetometer is prolonged. The testing device saves the materials, increases a qualification rate of the absorption chamber, shortens the manufacturing period of the magnetometer, improves the quality of the absorption chamber of the optical pumping magnetometer, and is simple to operate and low in cost.

Description

Technical field: [0001] The invention relates to a high-precision geophysical measuring instrument, in particular to a device for testing the absorption ratio of an absorption chamber of an optical pump magnetometer by using the principle of the optical pump action and a method for testing the absorption ratio. Background technique: [0002] At present, optically pumped magnetometers are mainly used in aviation detection, ocean detection and space detection. It is based on the Zeeman effect of atoms with a certain magnetic moment in an external magnetic field, and is developed using optical pumping technology and magnetic resonance technology. The absorption chamber in the probe is an important part of this type of magnetometer. The main factors that determine the effect of the optical pump are the volume of the absorption chamber, the inflation pressure and the purity of the gas, etc. The quality of its production will directly affect the measurement accuracy and sensitivi...

AI Technical Summary

Problems solved by technology

There are many problems in this method. For example, when the overall effect of the probe is not good, it cannot be determined that it must be the problem of the absorption chamber. material, which prolongs the production cycle of the magnetometer

[0007] Dr. Zhang Zhenyu of Jilin University's thesis "Research on Helium Optical Pump Magnetic Measurement Technology" described the physical principle of testing the absorption ratio, but did not design a specific practical device and online testing method

Images