The proposed trigger-less TBit/s readout for the Mu3e experiment

• Published in: Journal of instrumentation Vol. 9; no. 1; p. C01011
• Main Authors: Bachmann, S, Berger, N, Blondel, A, Bravar, S, Buniatyan, A, Dissertori, G, Eckert, P, Fischer, P, Grab, C, Gredig, R, Hildebrandt, M, Kettle, P -R, Kiehn, M, Papa, A, Perić, I, Pohl, M, Ritt, S, Robmann, P, Schöning, A, Schultz-Coulon, H -C, Shen, W, Shresta, S, Stoykov, A, Straumann, U, Wallny, R, Wiedner, D, Windelband, B
• Format: Journal Article
• Language: English
• Published: 01.01.2014
• Subjects: Charging; Decomposition; Electronics; Farms; Flavor (particle physics); Instrumentation; Particle physics; Time measurements; Workshops
• ISSN: 1748-0221; 1748-0221
• DOI: 10.1088/1748-0221/9/01/C01011

The Mu3e experiment searches for charged lepton flavor violation in the rare decay mu arrow right eee with a projected sensitivity of 10 super(-16). A precise measurement of the decay product momenta, decay vertex and time is necessary for background suppression at rates of 10 super(9) muons/s. This can be achieved by combining an ultra-lightweight pixel tracker based on HV-MAPS with two timing systems. The trigger-less readout of the detector with three stages of FPGA-boards over multi GBit/s optical links into a GPU filter farm is presented. In this scheme data from all sub-detectors is merged and distributed in time slices to the filter farm.