Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 42: Trigger und DAQ II
T 42.6: Vortrag
Montag, 29. Februar 2016, 18:00–18:15, VMP11 HS
GPU-based online track reconstruction for the MuPix-telescope — •Carsten Grzesik for the Mu3e collaboration — JGU, Mainz
The MuPix telescope is a beam telescope consisting of High Voltage Monolithic Active Pixel Sensors (HV-MAPS). This type of sensor is going to be used for the Mu3e experiment, which is aiming to measure the lepton flavor violating decay µ→ eee with an ultimate sensitivity of 10−16. This sensitivity requires a high muon decay rate in the order of 1 GHz leading to a data rate of about 1 TBit/s for the whole detector. This needs to be reduced by a factor 1000 using online event selection algorithms on Graphical Processing Units (GPUs) before passing the data to the storage.
A test setup for the MuPix sensors and parts of the Mu3e tracking detector readout is realized in a four plane telescope. The telescope can also be used to show the usability of an online track reconstruction using GPUs. As a result the telescope can provide online information about efficiencies of a device under test or the alignment of the telescope itself. This talk discusses the implementation of the GPU based track reconstruction and shows some results from recent testbeam campaigns.