Upgrade of the First Level Muon Trigger in the End-Cap New Small Wheel Region of the ATLAS Detector

The luminosity levels foreseen at the LHC after the 2018 LHC upgrade will tighten the demands on the ATLAS first level muon trigger system. Some of the present Muon Spectrometer components will fail to cope with these high rates and will have to be replaced. The introduction of new detectors in the small wheel region of the end-cap muon spectrometer will allow to refine the current trigger selection, allowing to increase the rejection power for tracks not coming from the interaction point, thus to and candidate muon tracks within 1 mrad angular resolution and within the 500 ns available latency.