New small wheel micromegas trigger simulation analysis.

The ATLAS New Small Wheels (NSW) utilize two innovative detector technologies: the small strip Thin Gap Chambers (sTGC) and the Micromegas (MM) for trigger and precision tracking at the high particle rates expected for the High-Luminosity LHC phase. The simulation of both sTGC and MM trigger was implemented, and performance evaluated in different configurations, serving as a crucial input for the optimization and hardware implementation of the trigger logic. This contribution will present the results from the MM trigger simulation analysis, the optimization of the angular variable reconstruction, and the definition of Region-of-Interest (RoI) and segments for the coincidences with other stations of the spectrometer. Monte Carlo samples including pile-up and cavern background simulation are also used to evaluate trigger rates with the expected background conditions.