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Petersen, B.

Paper Title Page
TPPT055 Electro-Polishing Surface Preparation for High Gradient Cavities at DESY 3304
 
  • A. Matheisen, h. Morales Zimmermann, B. Petersen, ms. Schmoekel, N. Steinhau-Kuehl
    DESY, Hamburg
 
  Improvement of acceleration gradients in super conducting accelerator structures was reached by applying electro polishing of the niobium surfaces. This technology is actually foreseen to serve as major surface preparation step for projects like the XFEL at DESY and the proposed ILC linear accelerator. At DESY an electro polishing apparatus was build up in 2003. After commissioning the apparatus operates regular for cavity surface treatment. We report on experiences with the electro-polishing set up, polishing parameters and results on the preparation of S.C. resonators for a high gradient module to be tested in the TTF2 accelerator at DESY.  
TPPT057 Quality Control of the Electro Polishing Process at DESY 3369
 
  • N. Steinhau-Kuehl, A. Matheisen, B. Meyer, B. Petersen, ms. Schmoekel
    DESY, Hamburg
 
  Funding: Supported by the European Community Research activity Care under the FP 6 program(RII3-CT-2003-506395).

The technology of electro-polishing of super-conducting resonators made from Niobium is foreseen as basic surface preparation technology for the Xfel accelerator project at DESY. Here about 1000 resonators will be build and installed into the accelerator section. For an industrial application of this technique a quality control has to be developed and established.A method to control the acid quality and improve the life time of the acid is under development. We report on the test setup and measurements done on samples and the implementation of this quality control to the DESY electro polishing process.