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HK: Physik der Hadronen und Kerne

HK 11: Poster Session: Nuclear and Particle Astrophysics

HK 11.4: Poster

Dienstag, 12. März 2002, 10:30–12:45, Foyer Chemie

Particle storage in MAC–E–Filters — •Thomas Thümmler, Beatrix Müller, Jochen Bonn, Beate Bornschein, Lutz Bornschein, Christian Weinheimer, Jean–Pierre Schall, Björn Flatt, Fernando Conda, Christine Kraus, and Ernst W. Otten — Institut für Physik, Johannes Gutenberg–Universität 55099 Mainz

Spectrometers of the Magnetic–Adiabatic–Collimator type are used to examine the endpoint region of the tritium /beta–decay spectrum. Due to the low count rate of the signal a low background count rate is crucial for the sensitivity on the neutrino mass especially for the planned KArlsruhe–TRItium–Neutrino experiment. The magnetic and electric field configuration of MAC–E–Filter leads to trapping conditions for charged particles, which are suspected to be the main reason for background events. Our simulations show that trapping conditions can be destroyed by use of an electric dipole field which is perpendicular to the magnetic field lines. First experimental studies are under way at the Mainz neutrino mass experiment.

Work sponsored by BMBF: FKZ06Mz866I/5.