The 2 Tbps "data to surface" system of the CMS data acquisition

Author

Arcidiacono, R. ; Brigljevic, V. ; Bruno, G. ; Cano, E. ; Cittolin, S. ; Erhan, S. ; Gigi, D. ; Glege, F. ; Garrido, R. Gomez-Reino ; Gulmini, M. ; Gutleber, J. ; Jacobs, C. ; Kreuzer, P. ; Presti, G. Lo ; De Abril, I. Magrans ; Marinelli, N. ; Maron, G.

Author_Institution

Massachusetts Inst. of Technol., Cambridge, MA

fYear

2005

fDate

10-10 June 2005

Abstract

The data acquisition system of the CMS experiment, at the CERN LHC collider, is designed to build 1 MB events at a sustained rate of 100 kHz and to provide sufficient computing power to filter the events by a factor of 1000. The data to surface (D2S) system is the first layer of the data acquisition interfacing the underground subdetector readout electronics to the surface event builder. It collects the 100 GB/s input data from a large number of front-end cards (650), implements a first stage event building by combining multiple sources into larger-size data fragments, and transports them to the surface for the full event building. The data to surface system can operate at the maximum rate of 2 Tbps. This paper describes the layout, reconfigurability and production validation of the D2S system which is to be installed by December 2005

Keywords

data acquisition; high energy physics instrumentation computing; particle accelerators; particle detectors; readout electronics; CERN LHC collider; CMS data acquisition; computing power; data to surface system; front-end cards; production validation; surface event builder; underground subdetector readout electronics; Acceleration; Buffer storage; Collision mitigation; Data acquisition; Detectors; Jacobian matrices; Laboratories; Large Hadron Collider; Power filters; Readout electronics;

fLanguage

English

Publisher

ieee

Conference_Titel

Real Time Conference, 2005. 14th IEEE-NPSS

Conference_Location

Stockholm

Print_ISBN

0-7803-9183-7

Type

conf

DOI

10.1109/RTC.2005.1547433

Filename

1547433