Miniature quad-channel spin-exchange relaxation-free magnetometer for magnetoencephalography

doi:10.1088/1674-1056/28/4/040703

中国物理B ›› 2019, Vol. 28 ›› Issue (4): 40703-040703.doi: 10.1088/1674-1056/28/4/040703

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Miniature quad-channel spin-exchange relaxation-free magnetometer for magnetoencephalography

Jian-Jun Li(李建军), Peng-Cheng Du(杜鹏程), Ji-Qing Fu(伏吉庆), Xu-Tong Wang(王旭桐), Qing Zhou(周庆), Ru-Quan Wang(王如泉)

1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 National Institute of Metrology, Beijing 100029, China;
4 School of Physics and Astronomy, Yunnan University, Kunming 650091, China

收稿日期:2019-01-07 修回日期:2019-02-23 出版日期:2019-04-05 发布日期:2019-04-05
通讯作者: Ru-Quan Wang E-mail:ruquanwang@aphy.iphy.ac.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0300600 and 2016YFA0301500), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB07030000), and the National Natural Science Foundation of China (Grant No. 11474347).

Miniature quad-channel spin-exchange relaxation-free magnetometer for magnetoencephalography

Jian-Jun Li(李建军)^1,2, Peng-Cheng Du(杜鹏程)^1,2, Ji-Qing Fu(伏吉庆)³, Xu-Tong Wang(王旭桐)^1,4, Qing Zhou(周庆)⁴, Ru-Quan Wang(王如泉)^1,2

1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 National Institute of Metrology, Beijing 100029, China;
4 School of Physics and Astronomy, Yunnan University, Kunming 650091, China

Received:2019-01-07 Revised:2019-02-23 Online:2019-04-05 Published:2019-04-05
Contact: Ru-Quan Wang E-mail:ruquanwang@aphy.iphy.ac.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFA0300600 and 2016YFA0301500), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB07030000), and the National Natural Science Foundation of China (Grant No. 11474347).

摘要/Abstract

摘要：

A miniature quad-channel optically pumped atomic magnetometer (OPM) has been developed based on the spin-exchange relaxation-free (SERF) mechanism. With a vapor cell of size 8 mm×8 mm×8 mm, we have incorporated four SERF magnetometer channels, which provides sufficient spatial resolution for magnetoencephalography (MEG). The four channels share the same laser beam for the best cancellation of common mode noise due to laser fluctuations. With gradient measurement, the sensitivities of the four sensors are better than 6 fT/Hz^1/2, which is also good enough for MEG measurement. The vapor cell is heated to 160℃ by a novel nonmagnetic current-heating structure. Our sensor with high spatial resolution and compact size is particularly suitable for MEG systems.

关键词: multi-channel, spin-exchange relaxation-free, optically pumped atomic magnetometer, magnetoencephalography

Abstract:

Key words: multi-channel, spin-exchange relaxation-free, optically pumped atomic magnetometer, magnetoencephalography

中图分类号: (Magnetometers for magnetic field measurements)

07.55.Ge

07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing) 44.10.+i (Heat conduction)

李建军, 杜鹏程, 伏吉庆, 王旭桐, 周庆, 王如泉. Miniature quad-channel spin-exchange relaxation-free magnetometer for magnetoencephalography[J]. 中国物理B, 2019, 28(4): 40703-040703.

Jian-Jun Li(李建军), Peng-Cheng Du(杜鹏程), Ji-Qing Fu(伏吉庆), Xu-Tong Wang(王旭桐), Qing Zhou(周庆), Ru-Quan Wang(王如泉). Miniature quad-channel spin-exchange relaxation-free magnetometer for magnetoencephalography[J]. Chin. Phys. B, 2019, 28(4): 40703-040703.

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Miniature quad-channel spin-exchange relaxation-free magnetometer for magnetoencephalography

Miniature quad-channel spin-exchange relaxation-free magnetometer for magnetoencephalography

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