Overview
The Drift Tube Track Finder (DTTF) is a joint project between the HEPHY Institute for High Energy Physics in Vienna, the theoretical Physics department at the Autonomous University of Madrid, and the Trigger Group from the University of Bologna. János Erö (HEPHY/Vienna) is responsible for the Hardware, while Jorge Trocóniz(UAM/Madrid) is responsible for the Software. The Bologna Trigger Group is in charge of the Wedge and Barrel Sorters.
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This picture contains the L1 trigger which quickly narrows down the data flow exclusively though hardware to keep up with the fast 40 megahertz acquisition and then the High Level Trigger (HLT) to process the analog data into a digital stream. The DTTF is an important part of the L1 trigger system. |
Specifically, the Drift Tube Track Finder (DTTF) has a very important role within the trigger. It receives impulses from the Local Drift Tube Triggers at all the muon sensors and proceeds to process the data to extrapolate the complete path of each muon.
Using the data the DTTF makes sure to check that the muon originated from the point of collision then processes the charge, transverse momentum and angles along two axes during its travel.
According to these four data qualifications and incorporating the quality of the data, the DTTF forwards the four best muons from each collision to the Global Muon Trigger for further screening.