SRF Test Facility Signal Archiving System for the RAON

Abstract

The Rare Isotope Science Project (RISP) of the Institute for Basic Science (IBS) has been developing a heavy-ion accelerator, called the Rare isotope Accelerator complex for ON-line experiments (RAON). For accelerator operation, The RISP control system adopts the Experimental Physics and Industrial Control System (EPICS) to control and monitor all accelerator software and hardware [1]. The signal archiving system is a core system for accelerator operation, and research for improving reliability and integrity is important. Signal archiver method using the EPICS framework has three significant modes of operation. First is the classic channel archiver using the file base method, and the second is the Relational DataBase (RDB) archiver using a relational database. But classic channel archiver has the problem that the index file contains information on a data block corresponding to PV data mismatch with real data. Also, the RDB archiver has a problem in the performance of file I/O. The RAON control group has built a signal archiving system using an archive appliance that solves the current problems from several archiving methods. This paper describes the result of the Superconducting Radio Frequency (SRF) archiving system based on the archiver appliance.