The Track-Finding Processor for the Level-1 Trigger of the CMS Endcap Muon System

Abstract

We present the design of a fast three-dimensional track-finding processor for the Level-1 trigger of the CMS Endcap Muon System. Each track is assembled from track segments identified in the Endcap Muon chambers. The processor measures the transverse momentum of the best muon candidates from the sagitta induced by the magnetic bending. The trigger algorithms are programmable since the processor is based on FPGA and RAM logic, allowing the experiment to adapt to different background conditions and colliding rates.