Abstract
The Texas Instruments' ASQ-81 scalar magnetometer provides high-resolution total field magnetic measurements. It uses an optically pumped metastable helium gas detector that has a range of 23000 to 75000 gammas (1 gamma=1 nT) and a 0.016 gamma peak-to-peak noise level. The authors first discuss the theory of operation for the ASQ-81 helium, optically pumped, controlled-oscillator type scalar magnetometer. Following this discussion, the measurement error induced by high sampling rates for a controlled oscillator magnetometer is quantized. A scheme for making frequency measurements that are free of this induced error by synchronizing the measurements with the modulation frequency of the controlled oscillator is presented. The authors describe the circuitry and techniques required to reduce the measurement error to less than the instrument noise level.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Instrumentation and Measurement
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
