Abstract
While the Relativistic Heavy Ion Collider presents problems neither of great size nor of state-of-the-art mechanical stability as found in other new accelerators, its control system must provide flexible, expandable connections between the operations and physics staff and the machine. The control system architecture is hierarchical in nature and consists of two physical layers with a fibre-optic network connection. The Console Level nodes including file-, database- and compute-servers are UNIX workstations. The Front End Level systems comprise VME crates with processors running the VxWorks real-time operating system. Accelerator devices are implemented as objects in C++. The network will be implemented using either FDDI or ATM technology, with bridges to Ethernet for connection to individual front ends. Specialized hardware modules are being designed for waveform control of power supplies, multiplexed signal acquisition, and timing services. Connection to slow systems will generally be made via VME interfaces to industrial PLC systems. The main features of the control system conceptual design are discussed, along with a progress report on controls development and RHIC construction.
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