Measurements of Magnetic Field Distributions With an Optically Pumped K-Rb Hybrid Atomic Magnetometer

被引：23
作者：
Ito, Yosuke [1 ]
Sato, Daichi [1 ]
Kamada, Keigo [1 ,2 ]
Kobayashi, Tetsuo [1 ]
机构：
[1] Kyoto Univ, Grad Sch Engn, Kyoto 6158510, Japan
[2] Japan Soc Promot Sci, Tokyo 1020083, Japan
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2014年 / 50卷 / 11期
关键词：
Atomic magnetometer; biomagnetics; CCD sensor; linear photodiode array; optical pumping; spin exchange; POTASSIUM; CELL;
D O I：
10.1109/TMAG.2014.2329856
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We have developed a K-Rb hybrid optically pumped atomic magnetometer (OPAM) for biomagnetic measurements. With this hybrid OPAM, we used a linear photodiode array and a charge-coupled device (CCD) sensor to instantaneously measure 1-D and 2-D magnetic field distributions generated by a test coil, respectively. The measured distributions were compared with those calculated using the Biot-Savart law and showed good agreement for the linear photodiode array; however, in the case of the CCD sensor in the area away from the test coil, the intensity of the detected magnetic field was slightly different from the calculated one, possibly because of the diffusion of the spin-polarized atoms as well as smear and blooming in the CCD sensor. The sensitivity of the OPAM was 5-6 pT/Hz(1/2) using the linear photodiode array and similar to 10 pT/Hz(1/2) using the CCD sensor. In future experiments, we plan to fabricate a sensor cell with a high density of probe atoms and reduce the noise generated in the electronic circuitry of the detectors in order to increase sensitivity.
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共 13 条
[1]   High-sensitivity atomic magnetometer unaffected by spin-exchange relaxation [J].
Allred, JC ;
Lyman, RN ;
Kornack, TW ;
Romalis, MV .
PHYSICAL REVIEW LETTERS, 2002, 89 (13) :130801-130801
[2]   Cesium coherent population trapping magnetometer for cardiosignal detection in an unshielded environment [J].
Belfi, J. ;
Bevilacqua, G. ;
Biancalana, V. ;
Cartaleva, S. ;
Dancheva, Y. ;
Moi, L. .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 2007, 24 (09) :2357-2362
[3]   A laser-pumped magnetometer for the mapping of human cardiomagnetic fields [J].
Bison, G ;
Wynands, R ;
Weis, A .
APPLIED PHYSICS B-LASERS AND OPTICS, 2003, 76 (03) :325-328
[4]   Optical magnetometry [J].
Budker, Dmitry ;
Romalis, Michael .
NATURE PHYSICS, 2007, 3 (04) :227-234
[5]   Three-Dimensional Magnetic Field Measurements in a Single SERF Atomic-Magnetometer Cell [J].
Gusarov, Alexander ;
Levron, David ;
Paperno, Eugene ;
Shuker, Reuben ;
Baranga, Andrei Ben-Amar .
IEEE TRANSACTIONS ON MAGNETICS, 2009, 45 (10) :4478-4481
[6]   Effect of Spatial Homogeneity of Spin Polarization on Magnetic Field Response of an Optically Pumped Atomic Magnetometer Using a Hybrid Cell of K and Rb Atoms [J].
Ito, Yosuke ;
Ohnishi, Hiroyuki ;
Kamada, Keigo ;
Kobayashi, Tetsuo .
IEEE TRANSACTIONS ON MAGNETICS, 2012, 48 (11) :3715-3718
[7]   Sensitivity Improvement of Spin-Exchange Relaxation Free Atomic Magnetometers by Hybrid Optical Pumping of Potassium and Rubidium [J].
Ito, Yosuke ;
Ohnishi, Hiroyuki ;
Kamada, Keigo ;
Kobayashi, Tetsuo .
IEEE TRANSACTIONS ON MAGNETICS, 2011, 47 (10) :3550-3553
[8]   Human MCG measurements with a high-sensitivity potassium atomic magnetometer [J].
Kamada, K. ;
Ito, Y. ;
Kobayashi, T. .
PHYSIOLOGICAL MEASUREMENT, 2012, 33 (06) :1063-1071
[9]   Cross-validation of microfabricated atomic magnetometers with superconducting quantum interference devices for biomagnetic applications [J].
Knappe, Svenja ;
Sander, Tilmann H. ;
Kosch, Olaf ;
Wiekhorst, Frank ;
Kitching, John ;
Trahms, Lutz .
APPLIED PHYSICS LETTERS, 2010, 97 (13)
[10]   A subfemtotesla multichannel atomic magnetometer [J].
Kominis, IK ;
Kornack, TW ;
Allred, JC ;
Romalis, MV .
NATURE, 2003, 422 (6932) :596-599
12