Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 94: Neutrino physics without accelerators VII

T 94.9: Talk

Thursday, March 18, 2021, 18:05–18:20, Ts

Current Status of the TRISTAN Project — •Daniel Siegmann for the KATRIN collaboration — Max-Planck Institute for Physics, Munich, Germany

The TRISTAN (TRitium Invetigations of STerile to Active Neutrino mixing) project aims to search for the signature of a keV sterile neutrino in the tritium beta decay spectra by upgrading the detector system of the KATRIN experiment. This extension of the experiment will be performed after its neutrino mass survey.

To reach a high sensitivity to the sterile neutrino mixing angle the strong activity of the KATRIN tritium source is required. The resulting high electron rate is one of the greatest challenges for the TRISTAN project. It will be approached by distributing the rate among 3500 pixels, resulting in count rates of 100 kcps per pixel. To resolve the kink-like signature of the keV sterile neutrino signal the detector needs to maintain an excellent energy resolution of 300 eV (FWHM) at 20 keV and a low energy threshold.

This year the first TRISTAN detector module was integrated into the Monitor Spectrometer of the KATRIN Experiment to investigate the overall detector performance and validate its design. The outcomes of this milestone as well as the upcoming steps for TRISTAN Project will be presented in this talk.

This work is supported by the Max Planck society and the TU Munich (“Chair for Dark Matter, Susanne Mertens”).