Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 90: DAQ / Trigger II
T 90.2: Vortrag
Donnerstag, 22. März 2018, 16:45–17:00, Z6 - SR 2.010
A vertical slice of the Mu3e readout system — •Sebastian Dittmeier for the Mu3e collaboration — Physikalisches Institut, Universität Heidelberg
The Mu3e experiment searches for the charged lepton flavor violating decay µ+→ e+e−e+ with an ultimate target sensitivity of one in 1016 decays (Phase II). Therefore, a continuous beam of up to 109 muons per second is stopped on a target and the decay products are observed.
The Mu3e detector consists of an ultra-thin silicon pixel tracking detector using High Voltage Monolithic Active Pixel Sensors to measure the vertex position and momentum of the decay products, and scintillating fibres and tiles for precise timing. The pixel detector consists of more than 180 million pixels. The resulting data rate that has to be processed is of the order of 1 Terabit per second. All detector components send their data continuously to a software filter farm, where data reduction takes place.
This talk covers the readout components of the pixel detector. The pixel sensors send their hit information continuously via fast serial data links to FPGAs located on the front-end boards where the data is time ordered. Via fast optical links, this data is sent to the switching boards where the data from several detector segments is merged into time slices of the full detector and provided to the computing nodes that perform online event reconstruction and filtering based on graphics processing units. The status of the vertical slice of the readout system is described.