• G. Kube, J. Gonschior, U. Hahn, G. Priebe, H. Schulte-Schrepping, Ch. Wiebers
  DESY, Hamburg
• P. Ilinski
  BNL, Upton, Long Island, New York
• C.G. Schroer
  TUD, Dresden
• S. Weisse
  DESY Zeuthen, Zeuthen

PETRA III is the new 3rd generation hard X-ray synchrotron light source at DESY, operating at a beam energy of 6 GeV. Machine commissioning began in April 2009 and user operation starts in 2010. In order to achieve a high brilliance, damping wigglers with a total length of 80 m are installed to reduce the horizontal emittance down to an extremely low value of 1 nm rad. For a precise emittance online control, a dedicated diagnostics beamline was built up to image the beam profile with synchrotron radiation from a bending magnet in the X-ray region. The beamline is equipped with two interchangeable X-ray optical systems, a pinhole optic for standard operation and a high resolution compound refractive lens optic. In addition, the synchrotron radiation angular distribution can be exploited at high photon energies. In this presentation, first experience with the system will be reported.

• G. Asova, J.W. Bähr, C.H. Boulware, A. Donat, U. Gensch, H.-J. Grabosch, L. Hakobyan, H. Henschel, M. Hänel, Ye. Ivanisenko, L. Jachmann, M.A. Khojoyan, W. Köhler, G. Koss, M. Krasilnikov, A. Kretzschmann, H. Leich, H.L. Luedecke, J. Meissner, B. Petrosyan, M. Pohl, S. Riemann, S. Rimjaem, M. Sachwitz, B. Schoeneich, J. Schultze, A. Shapovalov, R. Spesyvtsev, L. Staykov, F. Stephan, F. Tonisch, G. Trowitzsch, G. Vashchenko, L.V. Vu, T. Walter, S. Weisse, R.W. Wenndorff, M. Winde
  DESY Zeuthen, Zeuthen
• K. Flöttmann, S. Lederer, S. Schreiber
  DESY, Hamburg
• D.J. Holder, B.D. Muratori
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
• R. Richter
  Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin
• J. Rönsch-Schulenburg
  Uni HH, Hamburg

The PITZ facility is established for the development and testing of electron sources for FELs like FLASH and the European XFEL. The facility has been upgraded during the shutdown starting in summer 2007 to extend the capability of the facility to produce and characterize low emittance electron beams. The upgraded setup mainly includes a photo cathode L-band RF gun with solenoid magnets for space charge compensation, a post acceleration booster cavity and several diagnostic systems. The diagnostic systems consist of charge and beam profile monitors, emittance measurement systems and spectrometers with related diagnostics in dispersive arms after the gun and the booster cavities. RF gun operation with an accelerating gradient of 60 MV/m at the cathode is realized with this setup. A new photo cathode laser system with broader spectral bandwidth was installed for optimizing the temporal distribution of the laser pulses regarding to electron beam properties. Experimental results with this setup demonstrated very high electron beam quality as required for the photoinjector source of the European XFEL. In this contribution, the PITZ facility setup in year 2008-2009 will be presented.

*for the PITZ Collaboration