THE LNS COMPUTER CONTROL-SYSTEM FOR THE COMMISSIONING OF THE SUPERCONDUCTING CYCLOTRON

The K = 800 CSC (Catania Superconducting Cyclotron) is now under commi ssioning at LNS [1]. The accelerator was computer controlled since its first test. The control system has been realized according to a three level architecture. At field level, field-bus networks have been used as interface between the control stations and each device to be contr olled. The process level has been implemented using 386/486 PCs as con trol stations, each one dedicated to an accelerator sub-system accordi ng to functional criteria for the intelligence distribution. The contr ol stations communicate with the upper level by means of a local area network. The supervisor level consists of a Vax-Stations Cluster and a modular code, based on Dec Window Motif, has been developed as man-ma chine interface. Experience and improvements for an efficient commissi oning of a fully computer controlled accelerator will be reported toge ther with the performance obtained.