THE DATA ACQUISITION SYSTEM FOR THE CMS EXPERIMENT AT THE LHC
The Trigger and Data Acquisition systems will play a key role in experiments at the Large Hadron Collider (LHC) currently under construction at CERN. At the LHC, with a beam-crossing frequency of 40 MHz, and a design luminosity of 1034 cm-2 s-1, an average of 20 inelastic pp events will be produced per crossing. The CMS detector, with more than 108 electronics channels, will produce ~1MB of zero-suppressed data per crossing, so that both the collision and the overall data rates are many orders of magnitude larger than the current goals of storing events at a rate of 
