Current activities

• A short statement about the Bachelor and Master study programs in the framework of the Bologna process by J. Enders was recently published by the German online edition of the news magazine "Der Spiegel".
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• Improving the source performance: The current bake-out cycle at the source of polarized electrons aims at improving vacuum conditions and thus the cathode lifetime. Pressures around 10^-11 mbar have been achieved.
• The emittance of the polarized electron has been measured for several scenarios. We thus know the (transverse) beam parameters now very well.
• First experiments at the source of polarized electrons to measure the degree of polarization of bremsstrahlung produced by polarized electrons have been carried out in collaboration with KTH Stockholm. Analysis at KTH is in progress.
• Our Titanium:Sapphire laser system is in operation now; it is foreseen to produce pulsed polarized electron beams at the S-DALINAC. The laser has been funded by Deutsche Forschungsgemeinschaft (DFG) as part of a major new instrumentation initiative. Part of this project is also the design and construction of a polarimeter for 15-130 MeV electron beams. Both instruments require substantial research and development efforts. Several Bachelor projects and other student research is currently being carried out (i) for determining the wavelength of the Ti:Sa laser beam, (ii) its pulse length, and (iii) the optimized beam transfer into the accelerator hall using active stabilization.
• We are looking for motivated students to join our research programs.
• Data analysis of relativistic knockout reactions for nuclear-structure studies that were carried out at GSI last summer are nearing completion. Data on the first one-neutron removal reaction as well as the two-nucleon removal channel from radioactive carbon isotopes have been analyzed.
• The joint proposal of the universities Darmstadt, Frankfurt, Gießen, and the Frankfurt Institute for Advanced Studies for a "Helmholtz International Center for FAIR" got accepted within the Hessian initiative on research excellence LOEWE. A new institute will be formed to which research groups from the member institutions contribute. The research profile - to which we are contributing - will be simulations, detector development, and development of data analysis structures. The state will fund the project with more than 10 million Euro for the next three years. Research projects for students are available!

• Naturwissenschaften II (Natural Sciences II) for Mechanical Engineering Students
• Seminar for students in experimental physics: Nuclear structure and nuclear astrophysics (with Professor N. Pietralla and Professor T. Kröll)
• Group seminar: Polarized Electron Beams (with Professor M. Roth)
• Information on the reaccreditation process of the Bachelor's and Master's programs are available here (in German).

• The new Titanium:sapphire laser system is being put into operation. Research and development work for transferring the beam to the future source position at the S-DALINAC has started.
• Chopper and prebuncher radiofrequency cavities have been built. Temperature stabilization for the chopper system has been investigated.
• An experiment at GSI was carried out very successfully, studying the neutron removal from a neutron-deficient nucleus. This allows one to study the influence of short-range correlations of the nucleons deep inside the nucleus and is "physics beyond the standard (nuclear shell) model".
• A publication on a similar knockout experiment at GSI has been accepted for publication in Physics Letters B, in collaboration with groups from TU Munich, GSI, and international partners. P. Maierbeck et al., Structure of ⁵⁵Ti from
• We are looking for motivated, independent students to join us for research projects, "Miniforschung", and thesis work.

Group calendar (outdated)

Press reports