Abstract

A variant of the scheme of a magnetometric sensor based on cesium atomic vapor is proposed and experimentally investigated. The sensor uses magnetic resonance excitation by modulated light of an hyperfine optical pumping that is transverse to the magnetic field. It is shown that, for a cell with a volume of 0.125 cm³, the variational sensitivity of such a scheme, estimated from the ratio of the steepness of the signal in the center of the magnetic resonance to the shot noise of the detecting radiation, reaches a level of <10 fT/Hz^1/2 in the frequency band width of the order of 850 Hz. The sensor, which does not emit radio frequency fields, is designed for use in magnetoencephalographic complexes. Possible ways to improve the performance of the scheme for detecting relatively fast (~4.2 kHz in a field of 0.1 mT) signals of the precession of proton magnetic moments in promising ultra-weak field tomography schemes are considered.

中文翻译：

---

用于脑磁图和超低场断层扫描的全光学磁力计传感器

摘要

提出了一种基于铯原子蒸气的磁力传感器方案的变体，并进行了实验研究。该传感器通过横向于磁场的超精细光学泵浦的调制光使用磁共振激发。结果表明，对于一个容积为0.125 cm ^3的单元，这种方案的变化敏感性是根据磁共振中心信号的陡度与检测辐射的散粒噪声之比估算的，达到<10 fT / Hz ^1/2的水平在大约850 Hz的频带宽度中。该传感器不发射射频场，设计用于磁脑图复合体。考虑了在有前途的超弱场层析成像方案中改善检测质子磁矩进动的相对较快的信号（在0.1 mT的磁场中约为4.2 kHz）的方案的性能的可能方法。