Development of an optically pumped atomic magnetometer using a K-Rb hybrid cell and its application to magnetocardiography
Source abstract
Abstract
We have developed an optically pumped atomic magnetometer using a hybrid cell of K and Rb. The hybrid optical pumping technique can apply dense alkali-metal vapor to the sensor head and leads to high signal intensity. We use dense Rb vapor as probed atoms, and achieve a sensitivity of approximately 100 fTrms/Hz1/2 around 10 Hz. In this case, the sensitivity is limited by the system noise, and the magnetic linewidth is narrower than that for direct Rb optical pumping. We demonstrated magnetocardiography using the magnetometer and obtained clear human magnetocardiograms.
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Research context
OpenAlex topics: Atomic and Subatomic Physics Research · Quantum optics and atomic interactions · Advanced Frequency and Time Standards
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Affiliations
Kyoto University 1 Advanced Biomedical Engineering Research Unit, Center for the Promotion of Interdisciplinary Education and Research, , Kyoto-daigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
Kyoto University 2 Department of Electrical Engineering, , Kyoto-daigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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