The Atomic Magnetometer utilizes the spin properties of alkali metal atoms' outer-shell electrons, employing pump lasers as a means of manipulation to induce spin polarization in these atoms. When subjected to an external weak magnetic field, the alkali metal atoms undergo Larmor precession, altering their absorption of detection lasers, thus achieving high-sensitivity magnetic field measurements.
Atomic magnetometers possess characteristics such as high sensitivity, small size, low energy consumption, and portability, which will likely lead humanity into a quantum era in magnetic sensing fields such as scientific research and biomedical applications in the future.
The atomic magnetometer is primarily applied in magneto- and neuro-magnetic research. By capturing the magnetic field signals of the human body, the atomic magnetometer obtains images of the magnetic distribution of the heart, enabling functional diagnosis and prognostic studies of conditions such as myocardial ischemia, coronary microcirculation disorders, and myocardial diseases. Brain magnetic signals are weaker than heart magnetic signals, yet the quantum spin magnetometer can measure the magnetic fields generated by neural currents, enabling direct imaging of the brain's electrophysiology. This provides valuable information for clinical applications.
The atomic magnetometer captures variations in the Earth's magnetic field with precision, obtaining information about geomagnetic anomalies. This can be utilized for directional drilling in the petroleum industry, monitoring geological hazards, and exploration of mineral resources.
Atom | Rb-87 |
Sensitivity | <15 fT/√Hz |
Bandwidth | 1~100 Hz |
Range | ±5 nT |
Measuring Direction | Z/ Y/ Z&Y Axis |
Signal output | Analog signal&digital signal |
Background magnetic field | -100 nT~100 nT |
Number of channels | Expandable up to 256 channels |
Probe size | 30 mm*16 mm*12 mm |