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Wallen, E. J.

Paper Title Page
MOZAAB02 MAX-IV Design: Pushing the Envelope 74
  • M. Eriksson, M. Berglund, M. Brandin, D. Kumbaro, P. Lilja, L.-J. Lindgren, L. Malmgren, M. Sjostrom, S. Thorin, E. J. Wallen, S. Werin
    MAX-lab, Lund
  • H. Tarawneh
    SESAME, Amman
  The proposed MAX IV facility is meant as a successor to the existing MAX-lab. The acceleraor part will consist of three storage rings, two new ones operated at 3 and 1.5 GeV respectively and the existing MAX III ring. The two new rings have identical lattices and are placed on top of each other. Both these rings have a very small emittances, 0.86 and 0.4 nm rad respectively, and offer sychrotron radiation of very high mean brilliance. As an injector, a 3 GeV linear accelerator is planned. The design philosophy and the special technical solutions called for are presented in this paper.  
slides icon Slides  
TUPMS027 Development of Software to Control 8-Motor Elliptically Polarizing Undulators 1239
  • C. Spackman, E. A. Johnson
    Advanced Design Consulting, Inc, Lansing, New York
  • A. Deyhim
    Physics Teachers Association, Knoxville, Tennessee
  • J. T. Thånell, E. J. Wallen
    MAX-lab, Lund
  Funding: Swedish Natural Research Council (Vetenskapsrdet)

Advanced Design Consulting developed control software entitled IDcontrol for its state-of-the-art Apple II insertion devices (ID). These IDs feature 8 controllable axes: four servo motors control the gap and taper of two main girders, and four servo motors control the photon polarization-state by manipulating four sub-girders. IDcontrol simultaneously positions all 8 axes with high precision in real-time using 0.1 micron linear encoders attached directly to the girders and sub-girders. Helical and Inclined Plane phase modes are supported with automated mode switching. Magnetic-field-correction-coil current and girder taper are adjustable as functions of gap, phase, and phase mode. IDcontrol continuously monitors redundant encoder velocity and position data for maximal reliability, encoder failure detection, and damage prevention. Combined with ADCs Graphical User Interface (GUI) entitled IDgui, IDcontrol manipulates the ID, provides user notification and automated recovery from errors, management of correction data, and isometric visualization of the ID's girders. The functionality of both IDcontrol and IDgui has been demonstrated at MAX lab and the results will be discussed.