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| WEPL015 | An orbit feedback for the Free Electron Laser in Hamburg (FLASH) | feedback, controls, linac, synchrotron | 58 | |||||
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The lack of knowledge of the exact energy profile of the Free Electron Laser in Hamburg (FLASH) and thereby of the orbit response matrix, made the implementation of a conventional orbit feedback in the past very difficult. The new run period started this spring after extensive modifications of the facility, showed that the responses matrixes seam now to be in good agreement with the theory, thereby allowing the application of standard orbit feedback techniques. The physics concepts and the chosen architecture to implement such software on the middle layer and interplay with other high-level software components will be discussed. The development and implementation of this software using the DOOCS servers in combination with the dynamic components of the Java DOOCS data display (jddd) allowed a flexible and scalable implementation, which could also serve as a prototype for future implementations at e.g. the European XFEL.
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| THCOMA03 | Using ezcaIDL to connect to EPICS Channel Access from SHADOWVUI for Dynamic X-ray Tracing | simulation, synchrotron, synchrotron-radiation, radiation | 109 | |||||
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Using the ezcaIDL library, for IDL*, to provide an interface to EPICS Channel Access through the EZCA library, a simple XOP** extension was written that initializes ezcaIDL and thus allows access to a set of simplified IDL interface commands to connect to Channel Access from within XOP and also from SHADOWVUI. The XOP widget-based driver program is a commonly used front-end interface for computer codes of interest to the synchrotron radiation community. It models x-ray sources and characterizes optics. Extensions, such as SHADOWVUI, are optionally loaded to easily expand its functionality. An essential tool for x-ray optics calculations is the ray-tracing program SHADOW***. A complete Visual User Interface for SHADOW (SHADOWVUI) is an interactive tool for designing an optical system and visualizing results as graphs, histograms. The working scheme is to define the source and the optical elements by entering parameters. The author has taken the usual SHADOWVUI simulation of an x-ray system a step further by using ezcaIDL to interface with the EPICS control system to access the positions of optical components in real life and then run a corresponding simulation based upon these.
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* Interactive Data Language. |
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| THCOAA04 | Diamond's transition from VME to fieldbus based distributed control | controls, photon, instrumentation, vacuum | 124 | |||||
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The interface lay of Diamond's accelerator and photon beamline control systems have predominately been implemented as VME based systems. Forthcoming control systems, for new photon beamlines, have requirements necessitating a divergence from Diamond's adopted design patterns, including a reduction in available rack space and the management of hardware obsolescence. To address these, a new standard based on PCs and Ethernet field buses to the instrumentation has been defined. This paper will present the new design, how the design transition is being effected and the key benefits to Diamond.
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| THPL006 | Mechanical Vibration Measurement System at the Canadian Light Source | synchrotron, synchrotron-radiation, radiation, damping | 133 | |||||
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In recent decades, synchrotron radiation has developed into an invaluable scientific tool around the world. At synchrotron radiation facilities, the mechanical vibrations in the optics hutch and experimental hutch, especially in the vertical direction, enlarges the beam size and changes intensity of the monochromatic X-ray beam. To investigate mechanical vibrations at the CLS, a vibration measurement system was developed. The system includes a Vector Signal Analyzer (VSA) and accelerometers. The sensitivity of the accelerometer is 1.02 v/(m/s2). The frequency range of the accelerometer is 0.1 Hz to 300 Hz. The frequency resolution of the accelerometer is better than 0.1 Hz. The vibrations at four beamlines and endstations at the CLS, i.e. the Canadian Macromolecular Crystallography Facility (CMCF) 08ID-1 beamline, the Hard X-ray MicroAnalysis (HXMA) 06ID-1 beamline, the Resonant Elastic and Inelastic Soft X-ray Scattering (REIXS) 10ID-2 beamline, and the Scanning Transmission X-ray Microscope (STXM) endstation at the Spectromicroscopy (SM) 10ID-1 beamline, are investigated.
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Terzano, R., Denecke, M. A. & Medici, L. (2010). Synchrotron radiation in soil and geosciences. Journal of Synchrotron Radiation, 17, 147-148. |
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Poster
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| FRCOAA05 | Data Acquisition from heterogeneous sensor networks: the case of NEPTUNE Canada, the world largest cabled ocean observatory. | instrumentation, controls, monitoring, fibre-optics | 214 | |||||
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Ocean Sciences is at the crossroads: it is entering the brave new world of "Big Science". The first of a new generation of large facilities, the NEPTUNE Canada cabled ocean observatory (www.neptunecanada.ca) will be presented from the point of view of a sensor network composed of hundreds of diverse instruments. The challenges we faced will be reviewed, together with the selected network design, data management and data distribution approaches. Special emphasis will be placed on the architecture of the system and on the more recent developments and concepts used to help scientists in their exploitation of the data. Finally a number of the early discoveries made with the new facility will be briefly described.
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