Speaker
Bernd Stefan Windelband
(Ruprecht-Karls-Universitaet Heidelberg (DE))
Description
The Mu3e collaboration is setting up an experiment to study the decay of a muon into three electrons μ+→e+e-e+ . Any observation of this decay with the Mu3e experiment would point to physical processes so far not described in the standard model, mediated by the exchange of very heavy particles. The Mu3e Experiment is a combination of three detector technologies. The main part is a High Voltage – Monolithic Active Pixel Sensor (HV-MAPS) Tracker combined with a Fiber Tracker and a Tile Detector. The Experiment is sub segmented into five stations.
A main requirement is to reach a very low material budget (of 0.1% X/X0 per layer). Therefore the mechanics use an ultra-light weight support structure to fulfill this requirement. A folded 25 µm thick KaptonTM foil is used as a base support structure for the silicon chips. At the ends segmented support rings made out PEI give further stability to the system and serve in addition as a distribution for the gaseous Helium cooling. In this talk an overview of the extensive R&D concerning choice of materials and their mechanical properties as well as the development of the He-cooling will be presented.
Summary
