Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 80: Neutrinophysik IV

T 80.2: Talk

Thursday, March 28, 2019, 16:20–16:35, S06

Status of the TRISTAN project — •Thibaut Houdy for the KATRIN collaboration — Max Planck Institute for Physics, Föhringer Ring 6, 80805 München, Germany — Technische Universität München, Arcisstraße 21, 80333 München, Germany

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 precision of 200 meV (90% C.L.) after an effective data taking time of three years. It had successfully see Tritium light for the first time in June 2018. The TRISTAN (tritium beta-decay to search for sterile neutrinos) group aims at detecting a 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 while keeping a good energy resolution. Therefore, a novel multi-pixel silicon drift detector is being designed which is able to handle rates up to 100 Mcps with an energy resolution of 200 eV (FWHM) at 10 keV. First seven-pixel prototype detectors were successfully characterized and the first 166 pixels is under production. This talk presents the results of these measurement campaigns as well as next steps toward the final detector.