Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 21: Neutrino Physics without Accelerators 2
T 21.8: Vortrag
Montag, 21. März 2022, 18:05–18:20, T-H34
Measurement of the drift time in a silicon drift detector for the KATRIN experiment by laser pulsing — •Korbinian Urban1, Marco Carminati2,3, David Fink1, Carlo Fiorini2,3, Matteo Gugiatti2,3, Pietro King2,3, and Peter Lechner4 for the KATRIN collaboration — 1Max Planck Institute for Physics, Munich, Germany — 2DEIB, Politecnico di Milano, Milano, Italy — 3INFN, Sezione di Milano, Milano, Italy — 4Halbleiterlabor der Max Planck Gesellschaft, Munich, Germany
The KATRIN experiment investigates the endpoint of the tritium beta-decay spectrum to search for the effective mass of the electron neutrino. Furthermore, the KATRIN experiment has the potential to also search for the signature of a sterile neutrino in the keV-mass regime by measuring the entire tritium beta-decay spectrum with an upgraded detector system. The new detector system, named TRISTAN, will be a multi-pixel silicon drift detector. This technology provides an improved energy resolution at high rates compared to PIN detector diodes. The radial drift of a charge cloud to the small anode of each pixel with 3 mm radius can be a significant contribution to the time resolution of the detector. This talk presents a measurement where a pulsed red laser is used to characterize the drift time in a 7-pixel TRISTAN detector device.
This work is supported by BMBF (05A17PM3, 05A17PX3, 05A17VK2, and 05A17WO3), KSETA, the Max Planck society, and the Helmholtz Association.