• 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

• S. Rimjaem, J.W. Bähr, H.-J. Grabosch, M. Hänel, Ye. Ivanisenko, G. Klemz, M. Krasilnikov, M. Mahgoub, M. Otevrel, B. Petrosyan, S. Riemann, J. Rönsch-Schulenburg, R. Spesyvtsev, F. Stephan
  DESY Zeuthen, Zeuthen
• G. Asova, L. Staykov
  INRNE, Sofia
• K. Flöttmann, S. Lederer, S. Schreiber
  DESY, Hamburg
• L. Hakobyan, M.A. Khojoyan
  YerPhI, Yerevan
• M.A. Nozdrin
  JINR, Dubna, Moscow Region
• B.D. O'Shea
  UCLA, Los Angeles, California
• R. Richter
  Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin
• A. Shapovalov
  MEPhI, Moscow
• G. Vashchenko
  NSC/KIPT, Kharkov
• I. Will
  MBI, Berlin

At the Photo Injector Test facility at DESY, Zeuthen site (PITZ), high brightness electron sources for linac based Free Electron Lasers (FELs), like FLASH and the European XFEL are developed and characterized. The electrons are generated via the photoeffect at a cesium telluride (Cs2Te) cathode and are accelerated by a 1.6-cell L-band RF-gun cavity with an accelerating gradient at the cathode of about 60 MV/m. The profile of the cathode laser pulse has been optimized yielding small emittances using laser pulse shaping methods. The transverse projected emittance is measured by a single slit scan technique. The measurement program in the last run period at PITZ concentrated on emittance measurements for the nominal 1 nC beam and emittance optimization for lower bunch charges. The recent results show that normalized projected emittances of about 1 mm-mrad for 1 nC charge and below 0.5 mm-mrad for 250 pC bunch charges can be realized at PITZ. The facility setup and measurement results including the uncertainty of the measured values will be reported and discussed in this contribution.