Tübingen 2003 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 21: Kern- und Teilchen-Astrophysik II
HK 21.9: Talk
Tuesday, March 18, 2003, 17:45–18:00, F
A new precision measurement of the neutron electric dipole moment: magnetic problems — •Reinhold Henneck — Paul-Scherrer-Institut, CH-5032 Villigen, Schweiz
At PSI we are presently setting up a new source for ultracold neutrons (UCN) which will deliver UCN densities in excess of 1000 UCN/cm3. This improvement of about 2 orders of magnitude over existing facilities will open new prospects for studies of fundamental properties of the neutron and its decay. As a first experiment we intend to improve the sensitivity in the measurement of the neutron electric dipole moment (EDM) to about 2 x 10−28 e cm. At this level Supersymmetry models predict a finite EDM value. The EDM spectrometer employs the conventional Ramsey method, but makes use of a system of 8 HV chambers and 5 chambers without HV, which will reduce the influence of systematic effects due to magnetic problems and leakage currents considerably. We shall discuss the principle of the experiment, the expected statistical uncertainty and systematic effects. In particular we shall focus on problems connected with the magnetic field and present results from magnetic test experiments.