Frankfurt 2014 – wissenschaftliches Programm
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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 Sobolev1,2, 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.