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Monaco, L.

Paper Title Page
THPMN025 High QE Photocathodes Performance during Operation at FLASH/PITZ Photoinjectors 2763
 
  • L. Monaco
  • J. W. Baehr, M. Krasilnikov, S. Lederer, F. Stephan
    DESY Zeuthen, Zeuthen
  • J. H. Han, S. Schreiber
    DESY, Hamburg
  • P. Michelato, C. Pagani, D. Sertore
    INFN/LASA, Segrate (MI)
  
  Funding: Work supported by the European Community, contract number RII3-CT-2004-506008

The FLASH (DESY-Hamburg) and PITZ (DESY-Zeuthen) photoinjectors routinely use high quantum efficiency (QE) photocathodes produced at LASA (INFN-Milano), since 1998. To further understand the photocathode behavior during beam operation, photocathode QE measurements have been performed at different operating conditions in both RF photoinjectors. The analysis of these measurements will be used to improve the photocathode preparation procedures and to deeper understand the photocathode properties, whose final goal would be the further increase of their lifetime and beam quality preservation during the RF gun operations.

 
THPMN024 A Study for the Characterization of High QE Photocathodes 2760
 
  • D. Sertore
  • P. Michelato, L. Monaco, C. Pagani
    INFN/LASA, Segrate (MI)
  
  Funding: Work supported by the European Community, contract number RII3-CT-2004-506008

Based on our experience on photocathode production, we present in this paper the results of the application of different optical diagnostic techniques on fresh and used photocathodes. These techniques allow to study effects like non uniformity, cathode aging, etc. In particular, photocathode optical parameters and QE characterization, both done at different wavelengths, give fundamentals information for the construction of a model of the photoemission process to be applied to Cs2Te photocathodes. These studies are useful for further improving key cathode features, such as its robustness and lifetime as well as to study and control the photocathodes thermal emittance.

 
TUPMN026 Conditioning of a New Gun Cavity Towards 60 MV/m at PITZ 971
 
  • S. Lederer
  • G. Asova, J. W. Baehr, C. H. Boulware, H.-J. Grabosch, M. Hanel, S. Khodyachykh, S. A. Korepanov, M. Krasilnikov, B. Petrosyan, S. Rimjaem, T. A. Scholz, L. Staykov, F. Stephan
    DESY Zeuthen, Zeuthen
  • K. Boyanov
    INRNE, Sofia
  • L. H. Hakobyan
    YerPhI, Yerevan
  • P. Michelato, L. Monaco, C. Pagani, D. Sertore
    INFN/LASA, Segrate (MI)
  • R. Richter
    BESSY GmbH, Berlin
  • J. Roensch
    Uni HH, Hamburg
  
  Funding: This work has partly been supported by the European Community, contracts RII3-CT-2004-506008 and 011935, and by the 'Impuls- und Vernetzungsfonds' of the Helmholtz Association, contract VH-FZ-005.

Beginning 2007, a new gun cavity will be installed at the photo injector test facility at DESY in Zeuthen (PITZ). It will be conditioned towards gradients as high as 60 MV/m. This gradient is required for the operation of the European XFEL. Results from the conditioning for high peak power and high duty cycle will be reported.