Berlin 2014 – scientific programme
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A: Fachverband Atomphysik
A 39: Precision spectroscopy of atoms and ions IV (with Q)
A 39.8: Talk
Thursday, March 20, 2014, 12:15–12:30, BEBEL SR140/142
An absolute, high-precision 3He / Cs combined magnetometer — •Hans-Christian Koch1,2, Antoine Weis1, and Werner Heil2 — 1Université de Fribourg, Département de Physique, Chemin du musée 3, 1700 Fribourg (Switzerland) — 2Johannes Gutenberg Universität Mainz, Institut für Physik, Staudingerweg 7, 55128 Mainz (Germany)
Many experiments in fundamental science, such as the search for the neutron electric dipole moment (nEDM) at PSI, Switzerland, demand precise measurement and control of an applied magnetic field. Here, we report on a combined 3He-Cs magnetometer for absolute measurement of a µ T magnetic field with a precision of better than 10−6. The measurement principle relies on detection of the precession frequency of polarized 3He atoms by optically pumped double-resonance Mx-Cesium magnetometers. Measurements at the magnetically shielded room of PTB, Berlin, have been conducted to investigate the performance and intrinsic sensitivity of the combined device.