Dresden 2013 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 28: Fundamentale Symmetrien
HK 28.3: Talk
Tuesday, March 5, 2013, 15:00–15:15, HSZ-103
A highly sensitive 3 He-Magnetometer for the future n2EDM-Experiment at Paul Scherrer Institut, Switzerland — •Stefan Zimmer1, Werner Heil1, Hans-Christian Koch1,2, Andreas Kraft1, and nEDM collaboration3 — 1Institut für Physik, Universität Mainz — 2University of Fribourg — 3PSI
The measurement of the electric dipole moment of the free neutron (nEDM) is directly linked to the question of an accurante determination of the magnetic field conditions inside the nEDM spectrometer. The method is based on monitoring the free spin precession of nuclear polarized 3 He by means of optically pumped Cs-magnetometers. The sensitivity to trace tiny magnetic field fluctuations during a typical Ramsey-cycle of 200s reaches the fTesla level. The talk gives an status report on our 3 He magnetometer consisting of a compact 3 He polarizer- and compressor-unit, a transfer-line for the hyperpolarized gas into the µ -metal shield which houses the actual nEDM spectrometer with its two flat cylindrical magnetometer vessels sandwiching the double chambers for ultracold neutrons storage.