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| WECOMA01 |
Use of the Cell Accelerator Platform for Synchrotron Data Analysis
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4 |
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- J. Qin, M. Bauer, S. McIntryre
UWO, London, Ontario
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The analysis of synchrotron-based Polychromatic X ray Microscoscopy (PXM) data has been used by scientists and engineers to understand elastic and plastic strains in materials on aμor nano scale. Such experiments generate hundreds or thousands of images where the analysis of each image often entails intensive computations- a challenging task. As well, in the past, the speed of such computations has made it difficult to obtain feedback on the experimental results in near real time. This has constrained researchers from making critical decisions on direction subsequent experiments should take based on the results in hand. In order to improve the analysis performance of PXM images, we have investigated the use of parallel analysis schemes. This paper reports on the design and implementation of accelerated PXM analysis software that has been developed on IBM PowerXCell 8i processors and Intel quad-core Xeon processors. A substantial improvement in processing speed has been obtained to the extent that it should be possible to obtain analysis results at the same rate as they are produced on the VESPERS beamline at the Canadian Light Source Synchrotron(~1 Hz) .
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Slides
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| WECOMA02 |
Fast Orbit Correction at the Canadian Light Source
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9 |
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- C. G. Payne
CLS, Saskatoon, Saskatchewan
- D. Chabot
BNL, Upton, Long Island, New York
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Correction of the electron beam orbit in the storage ring at the Canadian Light Source has historically been implemented using a correction system capable of only moderate update rates. Over the past several years work has been undertaken to reduce orbit perturbations and improve end user synchrotron beam quality by reimplementing the correction system and enabling orbit corrections several orders of magnitude faster. This paper will describe the implementation and migration of the orbit control software from the slow correction system to the fast system.
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Slides
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| WECOMA03 |
High-Level Application Protocols
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12 |
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- N. Malitsky
BNL, Upton, Long Island, New York
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The report presents an overview of the different communication and serialization approaches in the context of the high-level client-server accelerator application environment. The list of examples includes CORBA, CDEV, Google's Protocol Buffers, DDS Extensible and Dynamic Topic Types, EPICS PVData, and others.
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Slides
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| WECOMA04 |
What's behind an Accelerator-Control-System?
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13 |
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There are a lot of features a control-system should have. Some of which are essential, e.g. that minimum set of application-programs and the infrastructure they need to run which at least allow operators to switch on and off the accelerator. Other features are not as obvious as GUIs, intelligent control algorithms or data-acquisition methods, but they require considerable manpower and should not be underestimated, for they have a major impact on the availability of the control system. This paper will describe the efforts made and being made by the control-systems group at DESY to provide a reliable tool for the operators, minimizing the downtime caused by control-system failures. This paper is a partial review of this aspect of computer based accelerator-control dating back to the late 1970s when the accelerator PETRA went into operation, controlled entirely by computers, i.e. mini-computers from NORSK DATA. Notwithstanding the respect we owe to the computer and to the technology which supports it, a good Control-System group behind an Accelerator-Control-System is essential to its success.
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