An overview of the Data Flow system for the NA48 experiment at CERN

Author

Fanti, V. ; Bozzoli, W. ; Brodier-Yourstone, Ph. ; McLaren, R.A. ; McCulloch, L. ; Matheys, J.-P. ; van Praag, A. ; Vande Vyvre, P. ; Pastore, A. ; Boyle, 0. ; McKay, N. ; Peach, K.J. ; Veitch, E. ; Walker, A. ; Fantechi, R. ; Luitz, S. ; Renk, B. ; Brier

Author_Institution

CERN, Geneva, Switzerland

Volume

2

fYear

1994

fDate

30 Oct-5 Nov 1994

Firstpage

623

Abstract

The NA48 experiment at CERN is designed to measure the magnitude of direct CP-violation in the neutral kaon system. The experiment requires a Data Flow system which will run at up to 100 Mbytes/sec. Elements of the detector generate data which are presented to Optical Link Sources. Data arrive at the Data Merger which concatenates the various sub-events into a complete event. The data are then sent, via a HIPPI-link and a crossbar switch to one of several Alpha OSF/1 workstations for filtering, reconstruction and storage. Software applications control the Data Flow System include a Control Program which supervises the system, a Data Merger Controller Program which controls data merging and distribution and other tasks which supervise storage resources. This paper provides an overview of the hardware setup and the software tasks which control and monitor it. The current state of development of this system and results obtained during test beam running in June and September 1994 are presented

Keywords

data acquisition; data flow computing; high energy physics instrumentation computing; merging; Alpha OSF/1 workstation; Control Program; Data Flow system; Data Merger; Data Merger Controller Program; HIPPI-link; NA48 experiment; crossbar switch; data merging; filtering; reconstruction; software; storage; Application software; Control systems; Corporate acquisitions; Filtering; Merging; Mesons; Optical fiber communication; Optical filters; Optical switches; Workstations;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record

Conference_Location

Norfolk, VA

Print_ISBN

0-7803-2544-3

Type

conf

DOI

10.1109/NSSMIC.1994.474528

Filename

474528