Implementation of the DCS System of the new MDT BIS78 Chambers for the upgrade of muon system of the ATLAS Experiment

The ATLAS Muon Spectrometer is going through upgrades on the Phase 1 in order to achieve higher rates for the upcoming LHC runs. The two main projects of this Phase 1 upgrade are the New Small Wheels (NSW), which are expected to complement the ATLAS muon spectrometer in the end-cap regions and a smaller size project, known as BIS78 (Barrel Inner Small sectors). In order to cope with higher LHC luminosities, the installation of NSW will help the reduction of the trigger rate in the forward region (|η|>1.3) of the Spectrometer. With half of the rate in the barrel-endcap transition region(1<|η|<1.3) reduced by the existing TGCs, the other half of the fake trigger rate in transition region will be reduced by the new BIS78 stations. The BIS78 subproject foresees the replacement of the existing Monitored Drift Tubes (MDTs), used for the precise position measurement in this area, with muon stations formed by integrated smaller diameter tubes (sMDT) and a new generation of RPCs, capable of withstanding the higher rates and provide a robust standalone muon confirmation. The existing BIS7 and BIS8 MDT Chambers will be replaced by 16 new muon stations of one small (sMDT) chamber and two RPC triplets, and it will be the pilot project for the Phase 2 BI Upgrade. In Τhis work the development of the DCS for the monitoring and operation of the new sMDT chambers of the MDT Sub-System will be presented.