Abstract
The Global Trigger is the final decision stage of the Level-1 Trigger of the CMS Experiment at the LHC. Previously implemented in VME, it has been redesigned and completely rebuilt in MicroTCA technology, using the Virtex-7 FPGA chip family. This allows implementing trigger algorithms close to the final analysis selection, combining different physical objects. The flexible and compact new system is presented, together with performance tests at a proton-proton centre-of-mass energy of 13 TeV. Firmware and software developments for the operation and validation of the Global Trigger will also be discussed.
Highlights
The CMS Global TriggerThere are data from other sources (the LHC beam detector “BPTX", the special “CASTOR” calorimeter and others) that can be used in the Global Trigger
Design and Performance of the Phase I Upgrade of the CMS Global Trigger
There are data from other sources that can be used in the Global Trigger. These so-called “External Conditions" are received via electrical connections and 14 merged with the muon and calorimeter data to use them in the trigger algorithms
Summary
There are data from other sources (the LHC beam detector “BPTX", the special “CASTOR” calorimeter and others) that can be used in the Global Trigger These so-called “External Conditions" are received via electrical connections and merged with the muon and calorimeter data to use them in the trigger algorithms. To collect the trigger decisions of several MP7s and to calculate a final trigger signal (FinOR) for the CMS experiment, an auxiliary AMC502 board designed by HEPHY Vienna and built by Vadatech company is used. This type of board is used to convert and forward the External Condition data received from other detector sources. The structure of the patch panels allows engineers to quickly add or 6 change optical fibre connections
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