Author: Simrock, S.
Paper Title Page
MOBAUST01 News from ITER Controls - A Status Report 1
  • A. Wallander, L. Abadie, F. Di Maio, B. Evrard, J-M. Fourneron, H.K. Gulati, C. Hansalia, J.Y. Journeaux, C.S. Kim, W.-D. Klotz, K. Mahajan, P. Makijarvi, Y. Matsumoto, S. Pande, S. Simrock, D. Stepanov, N. Utzel, A. Vergara-Fernandez, A. Winter, I. Yonekawa
    ITER Organization, St. Paul lez Durance, France
  Construction of ITER has started at the Cadarache site in southern France. The first buildings are taking shape and more than 60 % of the in-kind procurement has been committed by the seven ITER member states (China, Europe, India, Japan, Korea, Russia and Unites States). The design and manufacturing of the main components of the machine is now underway all over the world. Each of these components comes with a local control system, which must be integrated in the central control system. The control group at ITER has developed two products to facilitate this; the plant control design handbook (PCDH) and the control, data access and communication (CODAC) core system. PCDH is a document which prescribes the technologies and methods to be used in developing the local control system and sets the rules applicable to the in-kind procurements. CODAC core system is a software package, distributed to all in-kind procurement developers, which implements the PCDH and facilitates the compliance of the local control system. In parallel, the ITER control group is proceeding with the design of the central control system to allow fully integrated and automated operation of ITER. In this paper we report on the progress of design, technology choices and discuss justifications of those choices. We also report on the results of some pilot projects aiming at validating the design and technologies.  
slides icon Slides MOBAUST01 [4.238 MB]  
Control Theory and Application to Accelerators and Fusion Reactors  
  • S. Simrock
    ITER Organization, St. Paul lez Durance, France
  Feedback control plays an important role in the design and operation of modern accelerators and fusion devices. Feedback is required to stabilize inherently unstable system dynamics and processes and to improve machine performance. To better understand the theory of feedback control and be able to design feedback controllers this tutorial will consists of 3 parts: 1.Introduction to control theory (60 min) 2.Examples for control applications in accelerators and fusion devices (30 min) 3.Demonstration of control system analysis and design tools in the MATLAB / Simulink environment. (30 min) Control theory deals with the behaviour of dynamical systems. The desired output of a system is called the reference. When one or more output variables of a system need to follow a certain reference over time, a controller manipulates the inputs to a system to obtain the desired effect on the output of the system.  
slides icon Slides TUTMUKP01 [0.563 MB]  
WEPKS010 Architecture Design of the Application Software for the Low-Level RF Control System of the Free-Electron Laser at Hamburg 798
  • Z. Geng
    SLAC, Menlo Park, California, USA
  • V. Ayvazyan
    DESY, Hamburg, Germany
  • S. Simrock
    ITER Organization, St. Paul lez Durance, France
  The superconducting linear accelerator of the Free-Electron Laser at Hamburg (FLASH) provides high performance electron beams to the lasing system to generate synchrotron radiation to various users. The Low-Level RF (LLRF) system is used to maintain the beam stabilities by stabilizing the RF field in the superconducting cavities with feedback and feed forward algorithms. The LLRF applications are sets of software to perform RF system model identification, control parameters optimization, exception detection and handling, so as to improve the precision, robustness and operability of the LLRF system. In order to implement the LLRF applications in the hardware with multiple distributed processors, an optimized architecture of the software is required for good understandability, maintainability and extendibility. This paper presents the design of the LLRF application software architecture based on the software engineering approach and the implementation at FLASH.  
poster icon Poster WEPKS010 [0.307 MB]