A PROTOTYPE DAQ SYSTEM FOR THE ALICE EXPERIMENT BASED ON SCI

Authors
SKAALI B INGEBRIGTSEN L POLOVNIKOV S ROHRIG H WORMALD D
Citation
B. Skaali et al., A PROTOTYPE DAQ SYSTEM FOR THE ALICE EXPERIMENT BASED ON SCI, IEEE transactions on nuclear science, 45(4), 1998, pp. 1917-1922
Citations number
8
Categorie Soggetti
Nuclear Sciences & Tecnology","Engineering, Eletrical & Electronic
Journal title
IEEE transactions on nuclear science → ACNP
ISSN journal
00189499
Volume
45
Issue
4
Year of publication
1998
Part
1
Pages
1917 - 1922
Database
ISI
SICI code
0018-9499(1998)45:4<1917:APDSFT>2.0.ZU;2-I
Abstract
A prototype DAQ system for the ALICE/PHOS beam test and commissioning program is presented. The system has been taking data since August '97 , and represents one of the first applications of the Scalable Coheren t Interface (SCI) as interconnect technology for an operational DAQ sy stem. The front-end VMEbus address space is mapped directly from the D AQ computer memory space through SCI via PCI-SCI bridges. The DAQ comp uter is a commodity PC running the Linux operating system. The results of measurements of data transfer rate and latency for the PCI-SCI bri dges in a PC-VMEbus SCI-configuration are presented. An optical SCI li nk based on the Motorola Optobus I data link is described.