Bonn 2010 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 36: Postersitzung

HK 36.42: Poster

Wednesday, March 17, 2010, 14:00–16:00, HG Aula

Mercury magnetometry in the nEDM experiment — •Marlon Horras — Paul Scherrer Institut, Villigen, Schweiz — Excellence Cluster Universe, TU München, Deutschland

An improved experiment searching for the neutron electric dipole moment is currently being set up at the new high-intensity ultracold neutron (UCN) source at the Paul Scherrer Institut, Switzerland. In order to control ambient magnetic field fluctuations, an external field compensation coil system together with a 4-layer high permeability magnetic shield is used. Residual magnetic field fluctuations inside the ultracold neutron storage chamber are measured by a mercury co-magnetometer. With the expected increase in sensitivity due to the increased UCN densities, it has become essential to also improve the mercury co-magnetometer. The working principle, planned improvements and first results for the mercury co-magnetometer will be presented.