Comparison of discharge lamp and laser pumped cesium magnetometers
Abstract
We have performed a comparison of laser (LsOPM) and lamp (LpOPM) pumped cesium vapor magnetometers. Although the LsOPM operated 50% above its shot-noise limit we found an intrinsic sensitivity of 15 fT/\sqrt{Hz} and 25 fT/\sqrt{Hz} for the LsOPM and LpOPM respectively. Two modes of operation, viz.,the phase-stabilized and the self-oscillating mode were investigated and found to yield a similar performance. We have compared the performance of the LsOPM and the LpOPM directly by simultaneous measurements of field fluctuations of a 2 microtesla magnetic field inside a multilayer magnetic shield and have used one of the magnetometers for an active field stabilization. In the stabilized mode we found a gradient instability of 25 fT within an integration time of 100 s, which represents an upper limit of the long-term stability of the magnetometers.
Keywords
Cite
@article{arxiv.physics/0412011,
title = {Comparison of discharge lamp and laser pumped cesium magnetometers},
author = {S. Groeger and A. S. Pazgalev and A. Weis},
journal= {arXiv preprint arXiv:physics/0412011},
year = {2009}
}
Comments
11 pages, 13 figures, 1 table