Development of Data-logging System for FFAG Accelerator Complex in KURRI

It is important to record parameters of an accelerator sequentially all through the operations not only for storing of experimental data but for maintenance in stable operations. In our control system for an FFAG accelerator complex in KURRI (Kyoto University Research Reactor Institute),a client-server type data-logging system, which consists of a database server and PCs controlling the accelerator complex as client PCs has been constructed. In order to construct a data-logging system with multiple client PCs,some data-transfer methods were attempted. The construction method and the performance of our data-logging system will be introduced in this presentation. The FFAG accelerator complex has been operated as part of KART project in KURRI [1][2]. This accelerator complex consists of an ion source, three FFAG accelerators named Injector, Booster and Main Ring, respectively, and beamlines connecting between them. The overview of the FFAG complex is shown in Figure 1. The control system for this complex is based on conventional PCs and programmable logic controllers (PLC) connected over TCP/IP network. Each PLC is responsible for autonomous control of connected devices such as motors or power supplies, and also responsible for maintaining a parameter database periodically read/written by remote PCs over TCP/IP network. Man-machine interfaces (MMI) and integrated sequences are developed using LabVIEW on these PCs. More details and the latest status of our control system were reported at EPAC2008 [3]. As for a data-logging system, we have adopted a system based on MyDAQ in SPring-8 [4]