Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 8: Neutrinophysik V

T 8.7: Talk

Monday, March 19, 2018, 17:40–17:55, Z6 - HS 0.001

TRISTAN measurements at Troitsk nu-mass experiment — •Tim Brunst for the KATRIN collaboration — Max-Planck-Institut für Physik, München

The KATRIN (Karlsruhe Tritium Neutrino) experiment investigates the energetic endpoint of the tritium beta-decay spectrum to determine the effective mass of the electron anti-neutrino with a sensitivity of 200 meV (90% C.L.) after an effective data taking time of three years.

The TRISTAN (tritium beta-decay to search for sterile neutrinos) project aims at detecting a keV-scale sterile neutrino signature by measuring the entire tritium beta-decay spectrum with an upgraded KATRIN system. One of the greatest challenges is to handle the high signal rates generated by the strong activity of the KATRIN tritium source. Therefore, a novel multi-pixel silicon drift detector is being designed which is able to handle rates up to 100 Mcps with an excellent energy resolution of 200 eV (FWHM) at 10 keV.

First seven-pixel prototype detectors were successfully installed and operated at the Troitsk nu-mass experiment, one of KATRIN's technological predecessors. This talk presents the results of these measurement campaigns.