Title :
Development of a data acquisition system for the BABAR CP violation experiment
Author :
Claus, R. ; Grosso, P. ; Hamilton, R.T. ; Huffer, M.E. ; Grady, C. P O´ ; Russell, J.J. ; Scott, I.
Author_Institution :
Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
Experiences developing a data acquisition system for the BABAR CP violation experiment located at the Stanford Linear Accelerator Center are presented. The BABAR detector consists of multiple independent subdetectors joined with a data acquisition system consisting of a large number of embedded PowerPC single board computers residing in VME crates. The data acquisition software is layered on the VxWorks real-time operating system. It is partitionable to allow subsystems (as well as test stands) to operate independently. Data is assimilated into events through a combination of shared memory and a high performance network. This system presents data to a UNIX farm via a high speed non-blocking ethernet switch at a rate of 2 KHz. Topics such as bootstrapping and loading 200 processors, NFS file access for these processors and software development and deployment are discussed
Keywords :
Unix; computer bootstrapping; data acquisition; high energy physics instrumentation computing; BABAR experiment; CP violation; PowerPC; UNIX; VME crates; VxWorks; bootstrapping; data acquisition; ethernet; shared memory; Data acquisition; Detectors; Embedded computing; Ethernet networks; Linear accelerators; Operating systems; Programming; Real time systems; Switches; Testing;
Conference_Titel :
Real Time Conference, 1999. Santa Fe 1999. 11th IEEE NPSS
Conference_Location :
Sante Fe, NM
Print_ISBN :
0-7803-5463-X
DOI :
10.1109/RTCON.1999.842587
