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Rossbach, J.     [Roßbach, J.]

Paper Title Page
TUPB16 A Compact Electron Photon Diagnostic Unit for a Seeded FEL 203
 
  • J. Bödewadt, J. Roßbach
    Uni HH, Hamburg
  • R. Ischebeck
    PSI, Villigen
  • B. Polzin, H. Schlarb, A. Wagner
    DESY, Hamburg
  
 

A seeded free-electron laser operating in the soft X-ray (XUV) spectral range will be added to the SASE FEL facility FLASH. The seed beam will be generated by higher harmonics of a near infrared laser system. A dedicated transport system will guide the radiation into the electron accelerator environment. Within the seed undulator section compact diagnostic units have to be designed to control the transverse overlap of the photon and the electron beam. These units contain a BPM a wire scanner and an OTR screen for the electron diagnostic. A Ce:YAG screen and a MCP readout for the wire scanner are foreseen to measure the photon beam position.

  
TUPD29 First Measurements of the Longitudinal Phase Space Distribution using the New High Energy Dispersive Section at PITZ 360
 
  • J. Rönsch, G. Asova, J.W. Bähr, C.H. Boulware, H.-J. Grabosch, L. Hakobyan, M. Hänel, Ye. Ivanisenko, M.K. Khojoyan, M. Krasilnikov, B. Petrosyan, S. Rimjaem, A. Shapovalov, R. Spesyvtsev, L. Staykov, F. Stephan
    DESY Zeuthen, Zeuthen
  • S. Lederer
    DESY, Hamburg
  • R. Richter
    Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin
  • J. Roßbach
    Uni HH, Hamburg
  
 

The Photo Injector Test facility at DESY, Zeuthen site, (PITZ) develops and optimizes high brightness electron sources for Free Electron Lasers (FELs) like FLASH and the European XFEL. A new multi-purpose dispersive section was designed* and installed to characterize the momentum distribution, the longitudinal phase space distribution and the transverse slice emittance of the electron bunch for an electron energy up to 40 MeV. The spectrometer consists of a 180 degree dipole magnet followed by a slit, a quadrupole magnet and two screen stations. One of the screen stations is equipped with an optical read-out for a streak camera to measure the longitudinal phase space distribution. The first measurement results and corresponding beam dynamics simulations of the longitudinal phase space and the momentum distributions will be reported in this contribution. The resolution of the system will be analysed and compared to the design expectations.


*Sergiy Khodyachykh et al.
"Design and Construction of the Multipurpose Dispersive Section at PITZ"
Proceedings of DIPAC 2007, Venice, Mestre, Italy 2007