Development of high speed sampling system using Yokogawa F3HA12

In order to control the accelerator, it is important to remotely monitor various kinds of equipment. For example, a pen recorder, a paperless recorder, etc. are often used to record analog voltage, temperature, etc. Due to the balance between the analog bandwidth and the sampling speed, it is not so easy to achieve contradictory requirements: 'to capture fast signal change' and 'to save/show averaged data for a long time'. Therefore, we have developed a high-speed sampling system with a combination of EPICS and F3HA12 (high speed data collection module) manufactured by Yokogawa. As an initial target of the system development, we selected the sampling speed faster than several hundred Hz, while the statistical data of the specific time window are transferred to the CPU at the rate about 1 Hz. The CPU module, F3RP61, controls the data acquisition module F3HA12 via backplane of the system. We use Linux OS and use the control software framework based on EPICS. On Linux, PREEMPT_—RT which is the configuration of the kernel is applied in order to improve the real-time performance, and unnecessary service has been stopped and parameter tuning are performed in order to operate the system stably. A supervisory process was implemented to recover the FIFO error of F3HA12 caused by delays in data transfer. We have developed a high speed sampling system that can measure 12CH data at the rate of 170 Hz using F3HA12 / F3RP61. In this presentation, we report details of the equipment and results obtained in the performance test. (author)