Laser 3He magnetometer for UGS applications

Charlie Hoke; Andrew Ochadlick; John Wynn

doi:10.1117/12.357143

30 July 1999 Laser ³He magnetometer for UGS applications

Charlie Hoke, Andrew Ochadlick, John Wynn

Proceedings Volume 3713, Unattended Ground Sensor Technologies and Applications; (1999) https://doi.org/10.1117/12.357143
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

A miniature absolute magnetometer is being developed by Raytheon Systems Company (RSC) for military applications under the Miniature Unattended Sensor Technology program. RSC's advanced magnetometer utilizes a laser to optically pump and spin polarize ³He in a small glass cell subjected to an applied field of two gauss. The spin polarized ³He nuclei process about the ambient field at a frequency proportional to the magnitude of the field. Through a process of relaxation, the spin polarized ³He becomes depolarized in a time called T₂. The precession generates a current in a pickup coil which is processed for a signal to detect, track and classify the passage of a mobile target. The magnetometer's unique characteristic of low noise at low frequencies makes the sensor well suited for detecting targets at long range.

Citation Download Citation

Charlie Hoke, Andrew Ochadlick, and John Wynn "Laser ³He magnetometer for UGS applications", Proc. SPIE 3713, Unattended Ground Sensor Technologies and Applications, (30 July 1999); https://doi.org/10.1117/12.357143

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