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Zelazny, S.

Paper Title Page
TPPA13 High-level Application Framework for LCLS 114
  • S. Chevtsov, D. Fairley, C. Larrieu, J. Rock, D. Rogind, G. R. White, S. Zelazny, P. Chu
    SLAC, Menlo Park, California
  A framework for high-level accelerator application software has been planned for the Linac Coherent Light Source (LCLS). The framework is based on plug-in technology developed by the Eclipse open-source project. Many existing functionalities provided by Eclipse are available to high-level applications written within this framework. The framework contains static data storage, configuration, and dynamic data connectivity, as well as modeling through XAL and MAD. Additionally, because the framework is Eclipse-based, it is highly compatible with any other Eclipse plug-ins, such as Control System Studio. The entire infrastructure of the software framework will be presented. Applications and plug-ins based on the framework are also presented.  
TPPA25 Scripting vs Programming: An Application Developer's Perspective 144
  • G. R. White, S. Zelazny, S. Chevtsov
    SLAC, Menlo Park, California
  We discuss our approach to writing high-quality beam analysis applications with rich Graphical User Interfaces (GUIs) for the Linear Coherent Light Source (LCLS) project at SLAC. The choice of Matlab as our environment is contrasted with the more traditional development of complex software in a programming language, such as Java. Some benefits and disadvantages of scripting and programming languages are illustrated on the basis of our practical experiences with similar physics applications. Specific findings are discussed from the developer's point of view, and general suggestions are made for when an application should be written in a programming rather than in a scripting language.

Work supported by Department of Energy contract DE-ACO3-76SFOO5 15.

WOAB01 Operational Tools at the Stanford Linear Accelerator Center 288
  • S. Chevtsov, P. Chu, D. Fairley, C. Larrieu, D. Rogind, H. Shoaee, M. Woodley, S. Zelazny, G. R. White
    SLAC, Menlo Park, California
  The operational tools at SLAC have been in continuous development for 20 years. These include a highly developed orbit correction package, an automatic bump maker, orbit fitting, lattice diagnostics, beta-matching and phase advance calculator, a macro recording facility, "Correlation Plots," which is a facility for conducting small ad-hoc experiments, plus a number of others. All of these use a global online modeling database system, and they are all integrated into a single interactive application program, so they interoperate seamlessly. In this talk I'll review these tools, and contrast them with systems we have recently developed which focus on support for accelerator physics conducted directly from numerical analysis packages such as Matlab, or from physicists' own small specialized programs. Lastly, our plans to rewrite all of these operational tools using modern software tools and infrastructure, and how we bridge old systems to new, will be presented.  
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RPPB19 Electron Bunch Length Measurement for LCLS at SLAC 644
  • S. Allison, S. Chevtsov, P. Emma, K. D. Kotturi, H. Loos, S. Peng, D. Rogind, T. Straumann, S. Zelazny
    SLAC, Menlo Park, California
  At Stanford Linear Accelerator Center (SLAC) a Bunch Length Measurement system has been developed to measure the length of the electron bunch for its new Linac Coherent Light Source (LCLS). This destructive measurement uses a transverse-mounted RF deflector (TCAV) to vertically streak the electron beam and an image taken with an insertable screen and a camera. The device control software was implemented with the Experimental Physics and Industrial Control System (EPICS) toolkit. The analysis software was implemented in Matlab using the EPICS/Channel Access Interface for Scilab and Matlab (labCA). This architecture allowed engineers and physicists to develop and integrate their control and analysis without duplication of effort.