• M. Sachwitz, A. Donat, U. Gensch, R. Heller, R. Sternberger, D. Thürmann, L.V. Vu
  DESY Zeuthen, Zeuthen
• U. Hahn, S. Karstensen, H. Schulte-Schrepping, K.I. Tiedtke
  DESY, Hamburg

A first prototype of a switching mirror has been designed, built and tested. With a repetition rate of up to 2.5 Hz the mirror is used to provide different beam lines with the Laser light produced by FLASH. The repetition accuracy is in the order of 1 um whereas the yawing is about 1 arcsec.