Abstract
The Muon-to-Central-Trigger-Processor Interface is part of the Level-1 trigger system of the ATLAS experiment at the Large Hadron Collider at CERN. The upgrade of the Muon-to-Central Trigger Processor Interface will be described. It will use optical input and provide full precision region-of-interest information for muon candidates to the topological trigger processor of the Level-1 trigger system. The new Muon-to-Central-Trigger-Processor Interface will be implemented as an ATCA blade receiving 208 optical serial links from the ATLAS muon trigger detectors. Two high-end processing FPGAs will eliminate double counting of identical muon candidates in overlapping regions and send candidate information to the topological trigger and multiplicities to a third FPGA which will combine the candidate information, send muon multiplicities to the Central Trigger Processor and provide readout data to the ATLAS data acquisition system. A System-on-Chip module will provide communication with the ATLAS run control system for control, configuration and monitoring of the new Muon-to-Central-Trigger-Processor Interface.
Highlights
The ATLAS trigger system consists of a first-level trigger based on custom electronics and firmware which reduces the event rate to a maximum of 100 kHz, and a higher-level trigger system based on commercial-off-the-shelf computers and network components and processing software which reduces the event rate to around 1 kHz
The new MUCTPI prototype became available at the start of May 2017 and is currently being tested
The run control path has been tested with Xilinx Zynq evaluation boards
Summary
The ATLAS experiment [1] is a general-purpose experiment at the Large Hadron Collider (LHC) at CERN. It observes proton-proton collisions at a center-of-mass energy of 13 TeV. With about 25 interactions in every bunch crossing (BC) of the LHC beams every 25 ns, there are 109 interactions per seconds potentially producing interesting physics. A trigger system is needed in order to select those events with interesting physics content and which can be recorded to permanent storage at a reasonable rate. The ATLAS trigger system consists of a first-level trigger based on custom electronics and firmware which reduces the event rate to a maximum of 100 kHz, and a higher-level trigger system based on commercial-off-the-shelf computers and network components and processing software which reduces the event rate to around 1 kHz
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