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Honkavaara, K.

Paper Title Page
THPAN026 Beam Profile Measurements and Analysis at FLASH 3283
 
  • E. Prat, W. Decking, T. Limberg, F. Loehl
    DESY, Hamburg
  • K. Honkavaara
    Uni HH, Hamburg
  
  FLASH (Free Electron LASer in Hamburg) is a SASE FEL user facility at DESY, Hamburg. It serves also as a pilot project for the European XFEL. Although the slice emittance is a more appropriate parameter to characterize the SASE process, the projected emittance is a good indicator of the electron beam quality which can be measured in an easy and fast way. In this paper we present measurements of the projected emittance along FLASH. We also analyze the effect of the dispersion on transverse electron beam profiles.  
FRPMN027 Non-Intercepting Electron Beam Transverse Diagnostics with Optical Diffraction Radiation at the DESY FLASH Facility 3982
 
  • E. Chiadroni, M. Castellano
    INFN/LNF, Frascati (Roma)
  • A. Cianchi
    INFN-Roma II, Roma
  • K. Honkavaara
    Uni HH, Hamburg
  • G. Kube
    DESY, Hamburg
  • V. Merlo, F. Stella
    Universita di Roma II Tor Vergata, Roma
  
  Funding: Work supported by the European Comunity Infra-structure Activity under the FP6 Structuring the European Research Area program (CARE, contract number RII3-CT-2003-506395)

The characterization of the transverse phase space for high charge density and high energy electron beams is a fundamental requirement in many particle accelerator facilities, since knowledge of the characteristics of the accelerated beams is of great importance for the successful development of the next generation light sources and linear colliders. The development of suitable beam diagnostics, non-invasive and non-intercepting, is therefore necessary to measure the properties of such beams. Optical Diffraction Radiation (ODR) is considered the most promise candidate, as testified by the interest of many laboratories all around the world. An experiment based on the detection of ODR has been set up at DESY FLASH Facility to measure the electron beam transverse parameters. The radiation is emitted by a 700 MeV-energy electron beam passing through a slit of 0.5 mm or 1 mm aperture depending on the beam size. The slit is opened by chemical etching on a screen made of aluminum deposited on a silicon substrate. Radiation is then detected by a air-cooled high sensitivity CCD camera. The status of the experiment and preliminary results are reported.