| Paper | Title | Page |
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| TUDAUST01 | Inauguration of the XFEL Facility, SACLA, in SPring-8 | 585 |
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| The construction of the X-ray free electron laser facility (SACLA) in SPring-8 started in 2006. After 5 years of construction, the facility completed to accelerate electron beams in February 2011. The main component of the accelerator consists of 64 C-band RF units to accelerate beams up to 8GeV. The beam shape is compressed to a length of 30fs, and the beams are introduced into the 18 insertion devices to generate 0.1nm X-ray laser. The first SASE X-ray was observed after the beam commissioning. The beam tuning will continue to achieve X-ray laser saturation for frontier scientific experiments. The control system adopts the 3-tier standard model by using MADOCA framework developed in SPring-8. The upper control layer consists of Linux PCs for operator consoles, Sybase RDBMS for data logging and FC-based NAS for NFS. The lower consists of 100 Solaris-operated VME systems with newly developed boards for RF waveform processing, and the PLC is used for slow control. The Device-net is adopted for the frontend devices to reduce signal cables. The VME systems have a beam-synchronized data-taking link to meet 60Hz beam operation for the beam tuning diagnostics. The accelerator control has gateways to the facility utility system not only to monitor devices but also to control the tuning points of the cooling water. The data acquisition system for the experiments is challenging. The data rate coming from 2D multiport CCD is 3.4Gbps that produces 30TB image data in a day. A sampled data will be transferred to the 10PFlops supercomputer via 10Gbps Ethernet for data evaluation. | ||
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Slides TUDAUST01 [5.427 MB] | |
| WEMAU010 | Web-based Control Application using WebSocket | 673 |
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The Websocket [1] brings asynchronous full-duplex communication between a web-based (i.e. java-script based) application and a web-server. The WebSocket started as a part of HTML5 standardization but has now been separated from the HTML5 and developed independently. Using the WebSocket, it becomes easy to develop platform independent presentation layer applications of accelerator and beamline control software. In addition, no application program has to be installed on client computers except for the web-browser. The WebSocket based applications communicate with the WebSocket server using simple text based messages, so the WebSocket can be applicable message based control system like MADOCA, which was developed for the SPring-8 control system. A simple WebSocket server for the MADOCA control system and a simple motor control application was successfully made as a first trial of the WebSocket control application. Using google-chrome (version 10.x) on Debian/Linux and Windows 7, opera (version 11.0 beta) on Debian/Linux and safari (version 5.0.3) on MacOSX as clients, the motors can be controlled using the WebSocket based web-application. The more complex applications are now under development for synchrotron radiation experiments combined with other HTML5 features.
[1] http://websocket.org/ |
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Poster WEMAU010 [44.675 MB] | |
| THBHAUST05 | First Operation of the Wide-area Remote Experiment System | 1193 |
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The Wide-area Remote Experiment System (WRES) at the SPring-8 has been successfully developed [1]. The system communicates with the remote user's based on the SSL/TLS with the bi-directional authentication to avoid the interference from non-authorized access to the system. The system has message filtering system to allow remote user access only to the corresponding beamline equipment and safety interlock system to protect persons aside the experimental station from accidental motion of heavy equipment. The system also has a video streaming system to monitor samples or experimental equipment. We have tested the system from the point of view of safety, stability, reliability etc. and successfully made first experiment from remote site of RIKEN Wako site 480km away from SPring-8 in the end of October 2010.
[1] Y. Furukawa, K. Hasegawa, D. Maeda, G. Ueno, "Development of remote experiment system", Proc. ICALEPCS 2009(Kobe, Japan) P.615 |
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Slides THBHAUST05 [5.455 MB] | |