CERN Accelerating science

Article
Title	Recent Results and Perspectives of the Low Emittance Photo Injector at PITZ
Author(s)	Stephan, Frank ; Bähr, Jürgen ; Gensch, Ulrich ; Grabosch, Hans Jürgen ; HuiHan, Jang ; Krasilnikov, Mikhail ; Lipka, Dirk ; Miltchev, Velizar ; Oppelt, Anne ; Petrosyan, Bagrat ; Pose, Dietrich ; Riemann, S ; Staykov, Lazar
Affiliation	(DESY Zeuthen, Zeuthen BESSY GmbH, BerlinDESY Zeuthen, Zeuthen; INRNE, SofiaDESY Zeuthen, Zeuthen; YerPhI, YerevanDESY, HamburgINFN/LASA, Segrate (MI)INRNE, SofiaMBI, BerlinTU Darmstadt, DarmstadtUni HH, Hamburg)
Publication	2004
In:	26th International Free Electron Laser Conference and 11th FEL User Workshop 2004, Trieste, Italy, 29 Aug - 3 Sep 2004, pp.e-proc. THBOC02
Subject category	Accelerators and Storage Rings
Abstract	The Photo Injector Test Facility at DESY Zeuthen (PITZ) was built to study the production of minimum transverse emittance electron beams for Free Electron Lasers. In November 2003 the electron beam from the RF gun was fully characterized at PITZ. For a bunch charge of 1 nC a minimum normalized projected beam emittance of 1.5 π mm mrad in the vertical plane and a minimum geometrical average of both transverse planes of 1.7 π mm mrad have been achieved. This fulfils the requirements of the VUV-FEL at DESY Hamburg. In this contribution an overview on the measured electron beam and high duty cycle RF parameters including transverse emittance, thermal emittance, bunch length, momentum and momentum spread will be given. In addition, planned major upgrades and first results towards fulfilling the even more challenging requirements for the European XFEL will be discussed. This includes the increase of the accelerating gradient on the photo-cathode and the improvement of the transverse and longitudinal laser beam parameters.