X1 – X-Ray Radiation

The X1 collaboration develops at MAMI brilliant novel radiation sources, and explores their potential for applications. The electromagnetic spectrum extends from the far-infrared into the hard X-ray range. "Brilliant" means that a large number of photons from a small beam spot size with a diameter down to the sub-micron range, are emitted as sharp bundles into a certain spatial direction. The production mechanisms which have been explored include Smith-Purcell radiation in the infrared and optical spectral range, undulator radiation in the soft X-ray range, as well as channeling radiation, parametric X-radiation and transition radiation in the hard X-ray range.


A topical research field is the experimental investigation of channeling and photon emission of electrons or positrons in crystalline undulators. In this type of undulators powerful radiation with a narrow spectral distribution in the hard X-ray and gamma-ray region is expected, similar as in magnetic undulators. Positron-based crystal undulators were considered frequently as feasible devices; however, experiments with electrons have only been performed recently at MAMI.

Group members

  • Prof. Dr. Hartmut Backe
  • Dr. Werner Lauth


  • Dr. Gero Kube, DESY, Hamburg
  • Prof. Dr. Ulrik Uggerhøj, Universität Aarhus, Dänemark
  • Prof. Dr. Sultan Dabagov, INFN, Frascati, Italien
  • Dr. Wolfgang Wagner, FZ-Rossendorf, Dresden
  • Prof. Dr. Andrey V. Solov’yov, FIAS, Frankfurt
  • Dr. Peter Kunz, TRIUMF, Vancouver, Kanada