Resistive Plate Chamber (RPC) based Muon Trigger System for the CMS experiment – PAttern Comparator ASIC

The CMS detector will have a dedicated subdetector (RPC chambers) to identify muons, measure their transverse momenta pt, and determine the bunch crossings from which they originate. The trigger algorithm is based on muon track search and classification in raw data from the RPC chambers grouped in the four muon stations in the CMS magnet yoke. The PAttern Comparator (PCA) ASIC will search for tracks of muons and measure their momenta. The idea of PAC and its first prototype implementation are shown here.