Project Details
Projekt
Searching for charged lepton flavour violation with the Mu3e experiment -- Data Acquisition
Applicant
Professor Dr. Niklaus Berger
Subject Area
Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
Term
since 2021
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 443478861
The Mu3e experiment searches for the charged lepton flavour violating decay μ→eee, in its first phase aiming for a single event sensitivity (SES) of BR(μ→eee) ≈ 2-3 ∙10-15, corresponding to a factor 200 improvement compared to the existing bound. The experiment is currently under construction at the Paul Scherrer Institute (PSI) in Switzerland. The present project is concerned with the data acquisition and filter farm for Mu3e, a triggerless system which streams 100 Gbit/s out of the detector using a network of FPGAs and fast optical links. Fast GPUs are used for track and vertex reconstruction, which allows to select events of interest. Hardware and algorithms that have been built and tested in the previous funding period now need to be commissioned with the full detector, which will then allow for data taking and analysis. In parallel, we prepare for the second phase of the experiment at the new high-intensity muon beam at PSI, which will provide around 2∙109 muons/s to Mu3e and thus allows reaching the ultimate sensitivity of O(10-16). A focused R&D program tackles the challenges posed by the 20 time higher rates and correspondingly increased combinatorics by developing fast data transfer out of the detector and advanced reconstruction algorithms.
DFG Programme
Research Units
Co-Investigator
Frederik Wauters, Ph.D.
