Commissioning and integration testing of the DAQ system for the CMS GEM upgrade

The CMS muon system will undergo a series of upgrades in the coming years to preserve and extend its muon detection capabilities during the High Luminosity LHC.The first of these will be the installation of triple-foil GEM detectors in the CMS forward region with the goal of maintaining trigger rates and preserving good muon reconstruction, even in the expected harsh environment.In 2017 the CMS GEM project is looking to achieve a major milestone in the project with the installation of 5 super-chambers in CMS; this exercise will allow for the study of services installation and commissioning, and integration with the rest of the subsystems for the first time. An overview of the DAQ system will be given with emphasis on the usage during chamber quality control testing, commissioning in CMS, and integration with the central CMS system.The international CMS collaboration at the CERN-LHC experiment will conduct a major upgrade to its muon detection system to cope with the intense particle flux and radiation levels foreseen during the high-luminosity LHC era. The first CMS approved muon upgrade project (GE1/1) consists on the installation of new detectors in the CMS forward region based on Gas Electron Multiplier (GEM) technology to maintain an excellent muon reconstruction and particle identification in that region. Extensive simulation and test-beam exercises performed during the past few years ensure the optimal detector operation. Integration of five GEM modules into CMS done early 2017 allowed scientists to gain experience on mechanical installation, services and data acquisition (DAQ) infrastructures. This letter presents an overall description of the project with emphasis on the GEM data acquisition (GEM-DAQ) system and results on GEM local calibrations with the detector integrated into CMS for the first time