• S. Rimjaem, J.W. Bähr, Ye. Ivanisenko, M. Krasilnikov, J. Rönsch, F. Stephan
  DESY Zeuthen, Zeuthen
• M. Joré, A. Variola
  LAL, Orsay

Research activities at the Photo Injector Test facility at DESY, Zeuthen site, (PITZ) aim to develop and optimize high brightness electron sources for Free Electron Lasers (FELs) like FLASH and the European XFEL. To demonstrate the XFEL operation, an electron bunch train containing 3250 pulses of 1 nC charge at 10 Hz repetition rate is required. The spectrometers and related equipments for studying the longitudinal phase space for such long pulse trains do not yet exist at PITZ. Design and construction of a new high energy dispersive arm (HEDA2) is currently in progress. Besides the requirement to handle long electron bunch trains, the HEDA2 setup is designed to allow high resolution measurements of momentum distribution up to 40 MeV/c, a longitudinal phase space measurement with slice momentum spread down to 1 keV/c and transverse slice emittance measurements at off crest booster phases. The status of the physics design and technical considerations of this dispersive section will be presented in this contribution.

• P. Valente
  INFN-Roma, Roma
• N. Arnaud, D. Breton, L. Burmistrov, A. Stocchi, A. Variola, B.F. Viaud
  LAL, Orsay
• M. Boscolo, F. Bossi, B. Buonomo, G. Mazzitelli, F. Murtas, P. Raimondi, G. Sensolini
  INFN/LNF, Frascati (Roma)
• P. Branchini
  roma3, Rome
• M. Schioppa
  INFN Gruppo di Cosenza, Arcavacata di Rende (Cosenza)

The Frascati e⁺e^- collider DAΦNE, running at sqrt(s) 1.02 GeV is testing the crabbed waist scheme, aiming to reach a large improvement of the specific and integrated luminosity of the accelerator. In order to have a reliable, fast and accurate measurement of the absolute luminosity a number of dedicated detectors have been designed, built, tested, calibrated and put into operation. In particular, three different monitors have been realized: a Bhabha calorimeter, realized with lead/scintillator tiles read by WLS fibers subdivided in 10⁺¹⁰ phi sectors, a Bhabha GEM tracker, of annular shape, with a 4x16 pads per side, covering the same angular region between 18 and 27 degrees in theta, and a Bremsstrahlung proportional counters realized by a couple of 4 PbWO4 crystals at small angle. Results from the 2008 run of DAΦNE are presented, together with the analysis tools for background subtraction and comparison with GEANT simulations.