Nakamura, T. T.

Paper	Title	Page
WEP013	Application of a Simple Text Format as a Device Configuration File	432
	T. T. Nakamura KEK, Ibaraki
	In the KEKB magnet control system, relational database management system (RDBMS) has been used for the management of the device configuration. Most of the device parameters, such as address of the interfaces, constant parameters of the magnet power supplies, excitation functions of the magnets, limit values for the operation, etc. are stored in the RDBMS. These parameters are used mainly for the macro expansion to generate the runtime EPICS database files. They are also used to configure the high level application programs. Although this scheme is flexible, it is heavy to maintain with little man power in the KEKB control group. To reduce the maintenance cost, restructuring of this scheme is planned. The plan consists of two major changes. One is the reducing data and making data structure simpler. Another is the replacing tools with simpler ones. As the part of the restructuring, the replacement of the RDBMS with a simple configuration files is planned. The configuration file has simple text format, which is designed easy to read and easy to modify only using text editor. The detailed design of the format and its application to the KEKB magnet control system are presented.
	Poster
WEP074	Upgrading the Control System of the Movable Masks for KEKB	546
	T. Nakamura MELCO SC, Tsukuba K. Furukawa, T. T. Nakamura, J.-I. Odagiri KEK, Ibaraki
	The positron ring and the electron ring of KEKB have their own dedicated movable masks to cut off spent electrons/positrons near the beam orbit to reduce background in the detector. The stepping motor drivers of the movable masks were controlled by a Programable Logic Controller (PLC), which was supervised by a VME-based IOC. The IOC and the PLC was connected with each other by using GP-IB interface for the communication. Recently, however, the GP-IB connection came to be unstable causing communication errors between the IOC and the PLC. In order to solve the problem, a new type of IOC, which runs Linux on a CPU module of FA-M3 PLC, has been adopted. The CPU functions with standard I/O modules of FA-M3 on the PLC-bus. In this control system, we replaced an existing ladder CPU with the IOC and the ladder program with an EPICS sequencer program for the efficiency of software development and ease of maintenance. The new IOC has been successfully serving since it was put in operation in September 2008. In this paper, we describe the details of the new control system and its experiences up to the date.
THP052	New Event-based Control System for Simultaneous Top-up Operation at KEKB and PF	765
	K. Furukawa, T. T. Nakamura, M. Satoh, T. Suwada KEK, Ibaraki A. Kazakov Sokendai, Ibaraki T. Kudou, S. Kusano, T. Nakamura MELCO SC, Tsukuba
	The 8-GeV linac at KEK provides electrons and positrons to three ring accelerators of KEKB-HER, KEKB-LER and Photon Factory. Simultaneous top-up injections to those rings are carried for the ultimate experimental results at the both KEKB and PF facilities. An event-based fast control system was newly constructed overlapping the existent EPICS control system. The new system controls the distant equipment globally utilizing event modules from MRF and several other techniques. The event system enables fast controls from pico-second to milli-second range, and the conventional EPICS system covers slower controls. More than 100 parameters are driven globally by the event system every 20ms pulse in order to generate beams with three-times different energies and 100-times different charges. And more than 500 parameters are observed synchronously to ensure the beam operation. The system enables the future accelerator complex such as SuperKEKB as well. This paper describes the detailed design of the hardware and software structures, beam operation experiences, and possible extensions towards the future.
	Poster
THP100	Present Status and Upgrade of VME Computer in KEKB	874
	K. Yoshii, T. Nakamura MELCO SC, Tsukuba K. Furukawa, E. Kikutani, K. Mori, T. T. Nakamura KEK, Ibaraki
	We controlled main equipment of the accelerator used Epics based control system at KEKB. We had stabilized operation and development in basics as the upper limit,and Epics3.13, the CPU(PPC 6750) which we used from startup time now. However, the speedup of the network and the speedup of the CPU advanced, and the part that cannot correspond under the present conditions has become a problem gradually. Therefore, the necessity of Epics and CPU upgrade has gradually risen to us. We started developpment including upgrade CPU with PPC-MVME5500 and Epics with 3.14 form 2006 at KEKB. We have succeeded in the VME control by CPU PPC-MVME5500 which carried VXI, Trigger Reciver, PVME501, advme1522, Camac so far. We were realized fiveplaces of operation at present KEKB. In addition, the replacement is scheduled to be advanced as upgrade of CPU and Epics in the future based on the result. Here, this reports on the present status and upgrade of VME computer at KEKB.
THD005	Application of EPICS on F3RP61 to Accelerator Control	916
	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
	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.