München 2019 – wissenschaftliches Programm
HK 53.7: Vortrag
Donnerstag, 21. März 2019, 15:45–16:00, HS 12
Investigations of the KATRIN interspectrometer Penning trap — •Mariia Fedkevych — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Deutschland
The KArlsruhe TRItium Neutrino experiment (KATRIN) is aiming to probe the average electron (anti)neutrino mass with a sensitivity of 0.2 eV/c2 (90 % C.L.). It uses a pair of electrostatic spectrometers of MAC-E filter type to analyze energies of electrons from tritium-β-decay. In the region between the spectrometers, a Penning trap is created by their retarding potentials combined with the magnetic field produced by a superconducting magnet. Electrons accumulating in this trap can lead to discharges which create additional background and may damage parts of the spectrometer and detector section of KATRIN. To counteract this problem, electron catchers were implemented in the beamline part between the two spectrometers to remove trapped electrons. The system was comissioned and showed its effectiveness for suppression of the Penning trap effects. Details of the measurements and experimental results will be presented. This work is supported under BMBF contract 05A17PM3.