DocumentCode
887998
Title
The E769 Multiprocessor Based Data Acquisition System
Author
Gay, C. ; Bracker, S.
Author_Institution
Department of Physics, University of Toronto, Toronto, Canada
Volume
34
Issue
4
fYear
1987
Firstpage
870
Lastpage
872
Abstract
The Data Acquistion system at Fermilab´s Tagged Photon Lab has been significantly upgraded by replacing a conventional minicomputer (PDP/11) based system reading out Camac front end modules via the Camac branch highway with a VME based multiprocessor system fed by smart crate controllers via high-speed parallel data paths. The input data rate has been increased from 350 Kb/s to 1.5 Mb/s (100 events /sec to 450 events /sec) while the dead time has decreased from 3 ms to .7 ms per event. Furthermore, a great deal of online computing power (70 ms of Vax11/780 equivalent time per event) is available for online processing. An overview of both the hardware and the software is given, along with more in depth discussions of four software issues.
Keywords
Control systems; Data acquisition; Hardware; Microcomputers; Multiprocessing systems; Optical control; Particle accelerators; Particle beams; Physics; Road transportation;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.1987.4334754
Filename
4334754
Link To Document