Key points are not available for this paper at this time.
We describe a Cs atomic magnetometer operating in the spin-exchange-relaxation-free (SERF) regime. With a vapor cell temperature of 103 ^ we achieve intrinsic magnetic resonance widths =17 corresponding to an electron spin-relaxation rate of 300 s^-1 when the spin-exchange rate is ₒ₄=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/Hz. Based on photon shot noise, we project a sensitivity of 40 pG/Hz. A theoretical optimization of the magnetometer indicates sensitivities on the order of 2 pG/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.
Ledbetter et al. (Thu,) studied this question.