The STAR experiment's data acquisition system

Citation
A. Ljubicic et al., The STAR experiment's data acquisition system, IEEE NUCL S, 47(2), 2000, pp. 99-102
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Nuclear Emgineering
Journal title
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
ISSN journal
0018-9499 → ACNP
Volume
47
Issue
2
Year of publication
2000
Part
1
Pages
99 - 102
Database
ISI
SICI code
0018-9499(200004)47:2<99:TSEDAS>2.0.ZU;2-S
Abstract
STAR is one of the major experiments at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory, Upton, USA. RHIC together with S TAR began commissioning in June 1999 while the first physics data will be g athered after October 1999. STAR will study ultrarelativistic heavy-ion col lisions using its large TPC (Time Projection Chamber) in the first months o f running. STAR's Data Acquisition system is a custom-built massively parallel system hierarchically organized into VME crates interconnected via a fast SCI netw ork. The twelve Sector VME Crates each contain a Sector Broker CPU and twel ve custom Receiver Boards, which are connected to the detector via a fiber optic link. Each Receiver Board hosts three custom Mezzanine Boards with a single Intel 1960HD CPU used to preprocess the data. The system is designed to process 100 events/s of incoming data keeping the output data rate on the order of 20 MB/s (1 event/s). Events will be selec ted using a third-level trigger utilizing real-time tracking. Built events are transported via SCSI to a workstation acting as an event buffer and for warded to the RHIC Computing Facility via Gigabit Ethernet for final archiv ing.