[en] Beamline control system is designed to achieve the controls by beamline experimental users. The system is designed adopting the so-called Standard Model concept which has advantage for extension of the system and for easy maintenance. The VMEbus is used as the front-end control system and UNIX workstations are used as the operator consoles. These computer system are connected to the FDDI backbone network as a distributed system. The control software is designed based on the event-driven client/server scheme. The remote procedure call (RPC) is used for communication between application software over the network. As a result, beamline users can control many beamline components such as insertion devices simply. (author)

[en] The start of use is expected in October, 1997, and the construction of beam lines is in the final stage. At present, the adjustment and test operation of beam line equipment are carried out in preceding beam lines. In this adjustment operation, also the test operation of beam line control system is included, and so far it has functioned without trouble. The beam line control system is composed of the control of precision handling of optical system and the control of equipment including the data collection system, and the protection of persons and the interlock for protecting equipment accompanying the operation of beam lines. The objects of control of the beam line control system in SPring-8 are inserted light source, mainstay channel, transport channel and optical hatch. These are related closely to the control of accelerators and the objects of control in user's experiment, and it is important to maintain the safety, reliability and security of the system. The concept of the construction of the beam line control system and the measures taken for the purpose are reported. The network computer system for controlling beam lines is explained. The software sequence for controlling beam lines is shown. The control system was completed, but its redundant design should be improved hereafter. (K.I.)

[en] This paper presents our development of the COM Express VME carrier board with remote management capability and actual installation into the accelerator control system in March 2012. The accelerator control system of SPring-8 employs VME computers as frontend controllers. About thirty years have passed since the VMEbus standard was established. VME market has been shrinking gradually in recent years. We have sometimes faced with difficulties of a narrow choice of VME CPU board in the market. We have, therefore, developed a VME carrier board that works as a VME CPU board by attaching a COM Express module. We can build up our VME CPU board by combining the carrier board with a suitable COM Express module in the growing COM Express market. We have designed the carrier board to realize another solution for the difficulty. That is, the VMEbus can be controlled from its PMC/XMC slot without attaching a COM Express module. High performance server computer would be a VME controller via a PCI/PCI Express extension like PCI Express External cabling, for example. In addition, we have developed the daughter card onto the carrier board to support remote management functions. It provides a VME/COM Express monitoring function, VMEbus reset function and KVM (keyboard, video, mouse) over IP function via an independent network interface on the carrier. (author)

[en] Published in summary form only

[en] We developed a PC/104-Plus based CPU module with Power over Ethernet (PoE, IEEE 802.3af) capability. It is based on RENESAS Technology SH-4 CPU that is used for embedded applications requiring both high performance and low power consumption. We ported Linux 2.6 kernel to the CPU module and set up to run on diskless environment of NFS root. By stacking a dedicated PoE low power module onto the CPU module, it runs without a direct DC power supply. The PoE capability has advantages of power cable saving and power management by remote operation via a power sourcing equipment such as a switching hub. We can choose stackable PC/104 or PC/104-Plus peripheral I/O modules from a variety of commercial products such as analog inputs and outputs or digital inputs/outputs. Therefore, we can assemble a compact, flexible and low-cost embedded-measurement instrument. As a first application, we have a plan to apply the CPU module to an analog-signal measurement such as a digital multi mater. We will report the influence of the PoE power sourcing on the measurement. (author)

[en] A measurement of the magnetic form factor of a ferromagnetic actinide compound of UTe with circularly polarized X-rays is reported. The present geometrical configuration of the measurement gives a form factor of L(k)+0.3S(k), where L(k) and S(k) are the form factors of the orbital and the spin magnetic moment, respectively. We have combined the X-ray magnetic form factor with the neutron one which gives L(k)+2S(k) (G. Busch et al.: J. Phys. C 12 (1979) 1391), and have deduced L(k) and S(k) separately. The obtained profiles of L(k) and S(k) show that the orbital and the spin magnetic moments are spatially spread out more than those calculated for a free uranium ion. (author)

[en] We developed accelerator management systems using Web-based GIS (Geographical Information Systems). GIS unifies location related data like position of equipment, drawings, images etc. and displays them on interactive map on web browsers. GIS can be used various phenomena, machine management, map-drawing management, asset management and scheduler etc. We build two systems, one is equipment management system of SPring-8 and another is real-time alarm display system for SCSS prototype 250 MeV linac. We describe those systems in this paper. (author)

[en] We have installed momentary line-drop protectors (MLP) to the SPring-8 beamline control system after removing UPS power supplies. The MLP is a capacitor charging power supply, and is designed to work for 15 years without maintenance. This paper reports on the result of a study of power outage characteristics of control system devices, and investigation of power failure events at SPring-8. (author)

[en] 'Handling of the light' means to adjust the position, dispersion, energy, phase and timing of the synchrotron light by controlling the beamline apparatus for experiments at the end station. The fundamental technologies of the interface between the apparatuses and the control system, of the network system and of the security management are presented. Examples of the control system architecture to optimize the beamline apparatuses including the spectrometer for each experiment are shown and the principle of the beamline control is explained. The standardizing of the control system has been started at the KEK-PF, where a system of message delivery type is employed. At the SPring-8, on the other hand, all the beamline control systems as well as the accelerator control system are all in a common computer environment. (K. Yoshida)

[en] SPring-8 Compact SASE-FEL Source (SCSS) project is in progress. To verify its feasibility, 250 MeV SCSS prototype accelerator (SPA) was constructed and beam commissioning started last October. We observed first lazing in June. In this paper, we describe the timing system of SPA. The time jitter of 0.71ps was achieved for a 5712 MHz synchronous delay unit. We measured the time jitter between an electron beam and a 5712 MHz RF that is a main acceleration RF frequency, and got 0.34ps. This demonstrates a good stability of SPA. (author)