| Paper |
Title |
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| WEP076 |
Control of the J-PARC Slow Extraction Line Based on Embedded EPICS
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549 |
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- M. Takagi
Kanto Information Service (KIS), Accelerator Group, Ibaraki
- N. Kamikubota, A. Kiyomichi, S. Murasugi, R. Muto, H. Nakagawa, J.-I. Odagiri, K. Okamura, Y. Shirakabe, M. Tomizawa, N. Yamamoto
KEK, Ibaraki
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The J-PARC Main Ring supplies high energy proton beams to the hadron experiment facility through the slow extraction line. It comprised of a series of septa, staring from a pair of electrostatic septa (ESS) followed by magnetic septa, and some of those septa are movable by using stepping motors to adjust their positions for a better optics. In order to control the power supplies of the septa and the stepping motors, an EPICS-based control is implemented based on a new type of Input / Output Controller (IOC), which runs Linux on a CPU module of FA-M3 Programmable Logic Controller (PLC). The CPU functions with normal I/O modules of FA-M3 on the PLC-bus. The most remarkable feature of the control system is that we replaced ladder programs with EPICS sequencer programs for the efficiency of the software development and ease of maintenance. And we found that the new type of IOCs had worked without any serious troubles during the beam commissioning period, from Run#21(Jan.2009) through Run22(Feb.2009). This paper describes the details of the new IOC and its experiences in J-PARC operation including long term stability.
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| THD005 |
Application of EPICS on F3RP61 to Accelerator Control
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916 |
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- J.-I. Odagiri, S. Araki, K. Furukawa, N. Kamikubota, A. Kiyomichi, K. Mikawa, S. Murasugi, H. Nakagawa, T. T. Nakamura, S. Yamada, N. Yamamoto
KEK, Ibaraki
- K. Kameda, T. Natsui, H. Shiratsu
Yokogawa, Tokyo
- M. Komiyama
RIKEN Nishina Center, Wako
- S. Motohashi, M. Takagi
Kanto Information Service (KIS), Accelerator Group, Ibaraki
- N. Nagura
Nippon Advanced Technology Co. Ltd., Ibaraki-prefecture
- T. Nakamura
MELCO SC, Tsukuba
- A. Uchiyama
SHI Accelerator Service ltd., Tokyo
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A new type of Input / Output Controller (IOC) has been developed based on F3RP61, a CPU module of FA-M3 Programmable Logic Controller (PLC). Since the CPU module runs Linux as its operating system, it takes no special effort to run EPICS IOC core program on the CPU module. With the aid of wide variety of I/O modules of FA-M3 PLC, the F3RP61-based IOC has various applications in accelerator control, such as magnet power supply control, monitoring interlock system, stepping motor control, data acquisition from beam monitors and so forth. The adoption of the new IOC makes the architecture of accelerator control systems simpler by unifying the two layers of front-end computers, i.e., the IOC layer and the PLC layer, into one layer. We found that the simplification of the control system architecture helps us to reduce the time and cost for the development and maintenance of the application software.
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