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Rehlich, K.

Paper Title Page
TUZ04 First Experiences with jddd for PETRA Vacuum Controls 74
  • E. Sombrowski, K. Rehlich
    DESY, Hamburg
  The commissioning of the rebuilt PETRA and the to be built XFEL accelerators at DESY, requires the creation of numerous new control panels. For a quick any easy creation of these panels the Java Doocs Data Display jddd [1] has been developed. jddd is a Java editor for designing and running control panels. It provides a rich set of ready-made components/widgets,e.g. status indicators, logic components to animate graphics and powerful plot components including online data analysis functionality. The panels are saved in an XML file format and kept in a centrally hosted subversion repository to allow proper bookkeeping and history tracking. Currently the PETRA vacuum controls are used as a real live test for jddd. This way the innovative concepts are being evaluated and the data access of multiple control systems, currently DOOCS, TINE and TANGO, can be optimized.

[1] E. Sombrowski, A. Petrosyan, K. Rehlich, P. Tege, "jddd: A Java Doocs Data Display for the XFEL", ICALEPCS'07, Knoxville, Tennessee, October 2007.

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TUP010 Buffer Manager Implementation for the FLASH Data Aquisition System 102
  • V. Rybnikov, A. Aghababyan, G. Grygiel, O. Hensler, R. Kammering, L. M. Petrosyan, K. Rehlich
    DESY, Hamburg
  The Free Electron Laser in Hamburg (FLASH) at DESY is a user facility. It produces laser light of short wavelengths from the extreme ultraviolet down to soft X-rays. To study, monitor and document the machine performance and parameters and also to collect the results of the experiment measurements a fast data acquisition (DAQ) system has been developed. A shared memory based buffer manager is the heart of the system. It arranges collected data as events for every linac short. All events can be read by different consumers simultaneously. Linac feedback and monitoring processes as well as experiment middle layer servers are typical clients of the buffer manager. Any client can also generate its own data and insert it into the same event or produce its own one. The paper will focus on the detailed implementation of the buffer manager and its main features. The experience and the achieved performance will be covered as well.  
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WEZ04 Using the Advanced Telecom Computing Architecture xTCA as Crate Standard for XFEL 162
  • O. Hensler, G. Petrosyan, L. M. Petrosyan, V. Petrosyan, K. Rehlich, P. Vetrov
    DESY, Hamburg
  At XFEL it is planned to install most electronic components and computers for LLRF, diagnostics and controls inside the tunnel. Access to these devices during the XFEL operation will not be possible. Remote control and monitoring of all relevant parameters of the shelfs/crates and the computers must be ensured and should be done in a standardised way. In addition software downloads and debugging up to the FPGA level should be provided, even if an operating system crashes e.g. due to radiation, maintenance functionality must be available. An introduction to xTCA will be given, the reasons to change the crate standard from a VME to a xTCA based system and the experience with this new electronics standard will be described.  
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