A description of the superconducting TESLA Test Facility Linear Accelerator, which is under installation at DESY by the TESLA collaboration and of the planed VUV FEL user facility will be given. We report on the infrastructure and technologies for preparation of accelerator components. Detailed information on the preparation sequences for cavities and the connected UHV beam-line equipment under cleanroom conditions of class 10 ASTM quality will be given. Experiences in handling, preparation and the efforts in quality control of components with the need of minimum contamination by particulates to reach acceleration gradients of above 25 MV/m will presented.
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*TESLA Collaboration: Armenia: Yerevan Pysics Institue, P.R.China: IHEP Beijing, Tsinghua Univ. Beijing, Finland: Inst. of Physics Helsinki, France: CEA/DSM Saclay, IN2P3 Orsay, Germany: May Born Inst. Berlin, DESY Hamburg/ Zeuthen, Univ. Wuppertal, Univers. Hamburg, Univ. Frankfurt, GKSS Geesthacht, FZ Karlsruhe, TU Darmstadt, TU Berlin, TU Dresden, RWTH Aachen, Univ. Rostock. Italy: INFN Frascati, INFN Legnaro, INFN Milano, INFN Roma II, Poland: Polish Acad. of science, Univ. Warsaw, INP Cracow, Univ. of Mining &Metallurgy, polish Atomic Energy Agency Energy Agency, Soltan Inst. for Nuclear Studies, Russia: JINR Dubna, IHEP Portvino, INP Novosibirsk, INR Troitsk, USA Argonne National Lab. Cornell Univ., FNAL, UCLA