• Ye. Ivanisenko, G. Asova, H.-J. Grabosch, M. Krasilnikov, M. Mahgoub, M. Otevrel, S. Rimjaem, F. Stephan
  DESY Zeuthen, Zeuthen
• M.A. Khojoyan
  YerPhI, Yerevan
• G. Vashchenko
  NSC/KIPT, Kharkov

Recent successes in existing linac based FEL facilities operation and improvements in future FEL designs became possible due to detailed research in high-brightness electron beam production. The Photo Injector Test facility in Zeuthen (PITZ) is the DESY center for electron source characterization and optimization. New slice emittance diagnostics was recently commissioned at PITZ. In the measurement approach a bunch is accelerated off-crest in the accelerating cavity downstream the gun, a part of the bunch is selected after a dipole with a slit perpendicular to the dispersive direction, and the transverse emittance of the bunch part is measured using a quadrupole or a slit scan. Test measurement results are presented for 1 nC charge, flat-top and Gaussian longitudinal laser shapes.