Spin-exchange-relaxation-free magnetometry with Cs vapor

被引：332

作者：

Ledbetter, M. P. ^{[1
]}

Savukov, I. M. ^{[1
]}

Acosta, V. M. ^{[1
]}

Budker, D. ^{[1
]}

Romalis, M. V. ^{[2
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW A | 2008年 / 77卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.77.033408

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We describe a Cs atomic magnetometer operating in the spin-exchange-relaxation-free (SERF) regime. With a vapor cell temperature of 103 degrees C we achieve intrinsic magnetic resonance widths Delta B= 17 mu G corresponding to an electron spin-relaxation rate of 300 s(-1) when the spin-exchange rate is Gamma(SE)= 14 000 s(-1). We also observe an interesting narrowing effect due to diffusion. Signal-to-noise measurements yield a sensitivity of about 400 pG/root Hz. Based on photon shot noise, we project a sensitivity of 40 pG/root Hz. A theoretical optimization of the magnetometer indicates sensitivities on the order of 2 pG/root Hz should be achievable in a 1 cm(3) volume. Because Cs has a higher saturated vapor pressure than other alkali metals, SERF magnetometers using Cs atoms are particularly attractive in applications requiring lower temperatures.

引用

页数：7

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