Control of KEKB vacuum system

lo a vacuum system of the KEKB accelerator that is a two ring electron-posi tion collider, there are nearly 10,000 control points. A large number of va cuum related components should be controlled and/or monitored at the rings and the beam transport line from the linac. Those component hardwares are c onnected to their sub-interfaces such as ADC interfaced by devices of CAMAC , RS-232C, GP-IB, and programmable logic controller (PLC) via GP-IB. The al l device interfaces are controlled with newly developed softwares based on EPICS (experimental physics industrial control system) and single board equ ipment control computers through a high speed network using a UNIX-based wo rkstation with X-terminals or emulators as operator consoles. The control p oints of the hardware for the vacuum system have been successfully implemen ted for monitor, control and data acquisition after the commissioning for 8 months utilizing EPICS software. (C) 2001 Elsevier Science B.V. All rights reserved.