A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

Winter, A.

Paper Title Page
MOPPH072 The IR-Beam Transport System from the ELBE-FELs to the User Labs 171
 
  • M. Justus, K.-W. Leege, D. Proehl, R. Schlenk, A. Winter, D. Wohlfarth, R. Wuensch, W. Seidel
    FZD, Dresden
  
  In the Forschungszentrum Dresden-Rossendorf, two free-electron lasers (FELs) have been put into operation. They produce laser light in the medium and the far infrared wavelength range (4-200 microns). The IR light is transported to several laboratories in the same building and to the adjacent building of the High Magnetic Field Laboratory (HLD) as well. The latter is up to 70m away from the FELs. Constructional peculiarities, the large wavelength range (a factor of 50 between the shortest and the longest wavelengths), the high average power in cw regime, and the beam property requirements of the users pose a challenge to the beam line design. The transport system includes vacuum pipes, plane and toroidal gold-covered copper mirrors, exit windows, and diagnostic elements. The designed transport system produces a beam waist at selected spots in each laboratory representing an image of the outcoupling hole. Spot size and position are independent of the wavelength. In the HLD the beam is fed into a circulare waveguide, guiding the radiation to the sample inside of a cryostat. To ensure the desired beam properties, the transport system has been analyzed by means of various ray and wave optical models.  
WEPPH039 The Optical Replica Synthesizer in FLASH 438
 
  • G. Angelova, V. G. Ziemann
    UU/ISV, Uppsala
  • J. Boedewadt, S. Khan, A. Winter
    Uni HH, Hamburg
  • A. Meseck
    BESSY GmbH, Berlin
  • E. Saldin, H. Schlarb, B. Schmidt, E. Schneidmiller, M. V. Yurkov
    DESY, Hamburg
  • P. M. Salen, P. van der Meulen
    FYSIKUM, AlbaNova, Stockholm University, Stockholm
  
  During the shutdown in spring 2007 the optical replica synthesizer, a novel device to diagnose ultra-short electron bunches, is assembled in the FLASH accelerator. We report on the status of the construction work with emphasis on the two electro-magnetic undulators needed for micro-bunching and replica-pulse generation.