CODA: A scalable, distributed data acquisition system

Conference · Tue Feb 01 00:00:00 EST 1994 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6864977

Watson, III, W A; Chen, J; Heyes, G; Jastrzembski, E; Quarrie, D ^[1]

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1. CEBAF, Newport News, VA (United States)

A new data acquisition system has been designed for physics experiments scheduled to run at CEBAF starting in the summer of 1994. This system runs on Unix workstations connected via ethernet, FDDI, or other network hardware to multiple intelligent front end crates -- VME, CAMAC or FASTBUS. CAMAC crates may either contain intelligent processors, or may be interfaced to VME. The system is modular and scalable, from a single front end crate and one workstation linked by ethernet, to as may as 32 clusters of front end crates ultimately connected via a high speed network to a set of analysis workstations. The system includes an extensible, device independent slow controls package with drivers for CAMAC, VME, and high voltage crates, as well as a link to CEBAF accelerator controls. All distributed processes are managed by standard remote procedure calls propagating change-of-state requests, or reading and writing program variables. Custom components may be easily integrated. The system is portable to any front end processor running the VxWorks real-time kernel, and to most workstations supplying a few standard facilities such as rsh and X-windows, and Motif and socket libraries. Sample implementations exist for 2 Unix workstation families connected via ethernet or FDDI to VME (with interfaces to FASTBUS or CAMAC), and via ethernet to FASTBUS or CAMAC.

• DOE Contract Number: AC05-84ER40150
• OSTI ID: 6864977
• Report Number(s): CONF-930640-; CODEN: IETNAE; TRN: 95-004962
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Vol. 41:1Pt1; Conference: RT '93: 8th IEEE conference on real-time computer applications in nuclear, particle and plasma physics, Vancouver (Canada), 8-11 Jun 1993; ISSN 0018-9499
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
43 PARTICLE ACCELERATORS
CEBAF ACCELERATOR
DATA ACQUISITION SYSTEMS
DESIGN
ACCELERATOR FACILITIES
COMPUTER NETWORKS
DATA TRANSMISSION SYSTEMS
DISTRIBUTED DATA PROCESSING
RADIATION DETECTORS
ACCELERATORS
DATA PROCESSING
LINEAR ACCELERATORS
MEASURING INSTRUMENTS
PROCESSING
440100* - Radiation Instrumentation
430303 - Particle Accelerators- Experimental Facilities & Equipment