Title: The Muon Trigger at DZero
Link to paper if available: 
Session of First Preference: Detector Developments
Session of Second Preference: 

LP Session: Not to be submitted.

Abstract:

To cope with the high luminosity environment of the upgraded TeVatron
pbarp collider at Fermilab, the DZero collaboration has significantly
improved the triggering capabilities of its detector. The new 3-level
trigger is based on physics objects, gradually decreasing the 7 MHz
input rate to an output rate of 20 Hz.

Level 1 of the muon trigger identifies muon candidates by combining
central fiber tracks, scintillator hits and wire centroids, using
Altera FPGA's to implement the algorithms. Level 2 uses a massively
parallel scheme of Texas Instruments DSP's to identify track
stubs. These stubs are then combined into muon track candidates by a
Digital Alpha processor. Level 3 consists of fast CPU's and a highly
parallelized data pathway. High level programming is used for the
filtering and storage of events for off-line reconstruction.

In this talk I will discuss the design and give the first
commissioning results of the muon trigger.


Submitted:  3 May 2001