Bonn 2010 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Fundamentale Symmetrien I
HK 27.7: Talk
Tuesday, March 16, 2010, 18:30–18:45, HG V
Active compensation of the magnetic field surrounding a new nEDM apparatus — •Beatrice Franke — Paul Scherrer Institut, Villigen, Schweiz — EXC Universe, Technische Universitaet Muenchen, Deutschland
A non-zero neutron electric dipole moment (nEDM) would violate time and parity reversal symmetry. Its detection would be a major discovery, but also improving the current upper limit of 2.9·10−26 e·cm constrains theories beyond the Standard Model of Particle Physics, such as super symmetry.
An apparatus is being set up at the Paul Scherrer Institut in Switzerland in order to improve the current sensitivity by two orders of magnitude. This shall be achieved by increasing statistics with a new powerful ultracold neutron source, and by improving control on systematics. The main sources for systematic errors are fluctuations of magnetic field inside the experimental volume. These might be introduced from the environment and shall be actively compensated for by implementing a surrounding field compensation (SFC) coil system. In this talk the working principle of the SFC and its commissioning will be presented. First results on the investigation of the magnetic environment of the experiment and the effect of the SFC on it are included.