Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

Cesium spin-exchange-relaxation-free magnetometer

Igor Savukov, Michael T. Ledbetter, Víctor M. Acosta, Dmitry Budker, Michael V. Romalis

Published May 4, 2008• 0 citations
Publisher

Abstract

We have built and tested a Cs atomic magnetometer operating in the spin-exchange-relaxation-free (SERF) regime at much lower temperature than a more conventional potassium SERF magnetometer developed at Princeton University.
DOI
10.1109/qels.2008.4553132

Related papers

Spin-exchange-relaxation-free magnetometry with Cs vapor

M. P. Ledbetter, Igor Savukov, Víctor M. Acosta +2 more

We describe a Cs atomic magnetometer operating in the spin-exchange-relaxation-free (SERF) regime. With a vapor cell temperature of $103\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ we achieve intrinsic magnetic resonance widths $\ensuremath{\Delta}B=17\text{ }\ensuremath{\mu}\text{G}$ corresponding to an electron spin-relaxation rate of $300\text{ }{\text{s}}^{\ensuremath{-}1}$ when the spin-exchange rate is ${\ensuremath{\Gamma}}_{\text{SE}}=14\text{ }000\text{ }{\text{s}}^{\ensuremath{-}1}$. We also observe an interesting narrowing effect due to diffusion. Signal-to-noise measurements yield a sensitivity of about $400\text{ }\text{pG}/\sqrt{\text{Hz}}$. Based on photon shot noise, we project a sensitivity of $40\text{ }\text{pG}/\sqrt{\text{Hz}}$. A theoretical optimization of the magnetometer indicates sensitivities on the order of $2\text{ }\text{pG}/\sqrt{\text{Hz}}$ should be achievable in a $1\text{ }{\text{cm}}^{3}$ 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.

arXiv:0708.1012•Physical Review A•Mar 13, 2008•400 citations

Study of optimum pumping intensity at Cs vapor magnetometer

Junhai Zhang, Feng Wang, Jiuxing Li +1 more

The paper describes a new magnetometer with Cs vapor in the spin exchange relaxation free (SERF) regime. Because cesium atom has a higher saturated vapor pressure than other alkali metallic atoms, so the magnetometer has required lower operated temperature. We have discussed the effect of different pumping intensities on the polarization and the pumping rate at 105°C in theory; and the result shows out the magnetometer will have maximum sensitivity when the pumping intensity is 52mW/cm2. Taking into account all relaxations including collision relaxations, diffusion relaxation and pumping relaxation from pump light, we find the relaxation rate will be about 6Hz for the cesium magnetometer with SERF.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•May 13, 2010•1 citation

Spin Exchange Relaxation Free (SERF) Magnetometers

Igor Savukov

Smart sensors, measurement and instrumentation•Sep 20, 2016•22 citations

Study of resonance curve width in Cs vapor magnetometer

Sun Weimin

A new magnetometer with Cs vapor in the spin exchange relaxation free(SERF) regime is described.Cs has a higher saturated vapor pressure than other alkali metals;so cesium SERF magnetometer is particularly attractive in applications that require lower power dissipation.Four factors affect atomic transverse relaxations in the SERF magnetometer,including collisions and diffusions among Cs,N2 and He,laser pumping and detecting processes;the buffer gas pressure of He that affects the relaxation is calculated and discussed emphatically in theory at 105 ℃,the result shows that the optimum buffer gas pressure is 350×133.3 Pa.Under the optimum pressure,the polarized spectrum linewidth as the function of the cell temperature is discussed briefly.It is found the least linewidth is only 3.7 Hz corresponding to the electric spin relaxation rate of 278 s-1 at 105 ℃.The result provides a help to increase the sensitivity of the magnetometer with Cs vapor.

Journal of Optoelectronics·laser•Jan 1, 2010•0 citations

Microfabricated spin exchange relaxation free atomic magnetometer

W. C. Griffith, Ricardo Jiménez-Martínez, Jan Preusser +2 more

Bulletin of the American Physical Society•May 22, 2009•0 citations

In Situ Calibration of Coils Constant in a Spin-Exchange Relaxation-Free (SERF) Co-magnetometer

Qian Cao, Ying Liu, Junjian Tang +3 more

Measurement•Mar 30, 2023•10 citations
We describe a Cs atomic magnetometer operating in the spin-exchange-relaxation-free (SERF) regime. With a vapor cell temperature of $103\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ we achieve intrinsic magnetic resonance widths $\ensuremath{\Delta}B=17\text{ }\ensuremath{\mu}\text{G}$ corresponding to an electron spin-relaxation rate of $300\text{ }{\text{s}}^{\ensuremath{-}1}$ when the spin-exchange rate is ${\ensuremath{\Gamma}}_{\text{SE}}=14\text{ }000\text{ }{\text{s}}^{\ensuremath{-}1}$. We also observe an interesting narrowing effect due to diffusion. Signal-to-noise measurements yield a sensitivity of about 400 pG/Hz400\text{ }\text{pG}/\sqrt{\text{Hz}}400 pG/Hz​. Based on photon shot noise, we project a sensitivity of 40 pG/Hz40\text{ }\text{pG}/\sqrt{\text{Hz}}40 pG/Hz​. A theoretical optimization of the magnetometer indicates sensitivities on the order of 2 pG/Hz2\text{ }\text{pG}/\sqrt{\text{Hz}}2 pG/Hz​ should be achievable in a 1 cm31\text{ }{\text{cm}}^{3}1 cm3 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.
The paper describes a new magnetometer with Cs vapor in the spin exchange relaxation free (SERF) regime. Because cesium atom has a higher saturated vapor pressure than other alkali metallic atoms, so the magnetometer has required lower operated temperature. We have discussed the effect of different pumping intensities on the polarization and the pumping rate at 105°C in theory; and the result shows out the magnetometer will have maximum sensitivity when the pumping intensity is 52mW/cm2. Taking into account all relaxations including collision relaxations, diffusion relaxation and pumping relaxation from pump light, we find the relaxation rate will be about 6Hz for the cesium magnetometer with SERF.
A new magnetometer with Cs vapor in the spin exchange relaxation free(SERF) regime is described.Cs has a higher saturated vapor pressure than other alkali metals;so cesium SERF magnetometer is particularly attractive in applications that require lower power dissipation.Four factors affect atomic transverse relaxations in the SERF magnetometer,including collisions and diffusions among Cs,N2 and He,laser pumping and detecting processes;the buffer gas pressure of He that affects the relaxation is calculated and discussed emphatically in theory at 105 ℃,the result shows that the optimum buffer gas pressure is 350×133.3 Pa.Under the optimum pressure,the polarized spectrum linewidth as the function of the cell temperature is discussed briefly.It is found the least linewidth is only 3.7 Hz corresponding to the electric spin relaxation rate of 278 s-1 at 105 ℃.The result provides a help to increase the sensitivity of the magnetometer with Cs vapor.