Spin-Exchange-Relaxation-Free Magnetometry with Cs Vapor
Abstract
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 microG corresponding to an electron spin-relaxation rate of 300 s(exp 1) when the spin-exchange rate is Gamma(sub SE)=14 000 s(exp 1). We also observe an interesting narrowing effect due to diffusion. Signal-to-noise measurements yield a sensitivity of about400 pG/Hz. Based on photon shot noise, we project a sensitivity of 40 pG/(square root of Hz). A theoretical optimization of the magnetometer indicates sensitivities on the order of 2 pG/(square root of Hz) should be achievable in a 1cubic cm 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 13, 2008
- Accession Number
- AD1003133
Entities
People
- D. Budker
- I. M. Savukov
- M. P. Ledbetter
- M. V. Romalis
- V. M. Acosta
Organizations
- University of California, Berkeley