Author: Marrek, K-H.
Paper Title Page
MOP050
 Strategy and Experiences on Procurement of Material for European XFEL Cavities  
 
  • X. Singer, J. Iversen, W. Singer
    DESY, Hamburg, Germany
  • F. Gaus, K-H. Marrek
    TÜV NORD Systems GmbH & Co. KG, Hamburg, Germany
  
  Analysis of the strategy for material procurement and quality management is done on base of the European XFEL experiences. In the preparation phase the requirements to material has been defined and the qualification of various companies as potential supplier for European XFEL executed. Estimation of the material for production of pressure bearing parts, creation of PMAs (particular material appraisal) acc. the European Pressure Equipment Directive and certification of the companies as producer of the material for pressure bearing parts has been done together with the notified body (TÜV NORD Systems). The procurement of material, QC, documentation, shipment and supervising the material workflow at cavity-producers has been carried out by DESY. Four companies produced ca. 25.000 semi-finished parts of high purity niobium and NbTi within of three years. Analysis of the main flaws and foreign material inclusions in niobium sheets is presented.  
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