Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

In the first part of the contribution, a rather simple design of a conventional, magnetically guided, continuous positron beam will be presented. The moderator is a tungsten mesh and the energy selection is realized using a bent tube. The sample is on ground potential. Further details will be presented during the talk.
In the second part of the talk, the recent progress of the EPOS project at the Research Center Dresden-Rossendorf will be demonstrated. EPOS consists of a pulsed monoenergetic positron beam (MePS), a conventional lifetime/Doppler spectrometer (CoPS), and a setup for gamma-induced positron annihilation spectroscopy (GiPS). While CoPS and GiPS systems are available for user operation, the MePS system is still under construction. First positrons were moderated and fed into the positron lab. At the moment, the chopper/buncher/accelerator system is under construction.