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T: Fachverband Teilchenphysik

T 39: Pixel Detectors II

T 39.10: Vortrag

Dienstag, 16. März 2021, 18:20–18:35, Tn

Mu3e inner tracker prototyping — •Thomas Rudzki for the Mu3e collaboration — Physikalisches Institut, Universität Heidelberg

The Mu3e experiment searches for the lepton flavour violating decay µ→ eee with an ultimate aimed sensitivity of 1 event in 10¹⁶ decays. This goal can only be achieved by reducing the material budget per tracking layer to X/X₀≈ 0.1 %. High-Voltage Monolithic Active Pixel Sensors (HV-MAPS) which are thinned to 50 µ m serve as sensors. Gaseous helium is chosen as coolant.

This talks presents the results of recent prototyping which verified that such an ultra-thin tracker can be constructed for the inner tracker. The construction and commission of this prototype were used to establish the quality assurance procedure for the final production. In addition, the helium cooling system was tested by heating the prototype with the nominal heat load.