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HK: Fachverband Physik der Hadronen und Kerne

HK 46: Poster

HK 46.37: Poster

Donnerstag, 20. März 2014, 16:00–18:00, HZ Poster

Study of magnetic field design for the neutron lifetime project: tau-SPECT — Marcus Beck¹, •Simo Dragisic¹, Klaus Eberhardt², Werner Heil¹, Jan Karch¹, Fabian Kories¹, Yury Sobolev^1,2, Dietmar Stepanow¹, and Norbert Trautmann² — ¹Institut für Physik Universität Mainz , Mainz, Deutschland — ²Institut für Kernchemie Universität Mainz, Mainz, Deutschland

Magnetic storage of ultracold neutrons (UCN) is a new approach to measure the lifetime of the free neutron. At Mainz we plan to upgrade the existing superconducting aSPECT spectrometer [1] by implementing a magnetic multipole made out of permanent magnets . This measure will provide the radial storage of UCN whereas the aSPECT magnet itself confines the UCN ("low field seakers") along its longitudinal axis. In the meantime, extensive magnetic field calculations have been done using Comsol multiphysics which gave us the optimum arrangement of multipole magnets. The poster informs about the requirements on the design of the Halbach multipole magnet, the resulting magnetic field strength and the geometric constraints within the cold bore tube of the aSPECT magnet.