Electron-ion collision spectroscopy and laser spectroscopy of highly-charged heavy ions at the FAIR storage rings
Justus-Liebig-Universität Gießen
Within the FAIR phase-0 research program, electron-ion collision spectroscopy and laser spectrocopy of highly charged heavy ions (including artificially generated radio isotopes) is carried out at the ion storage rings CRYRING and ESR. These experiments aim at deepening our understanding of the properties of matter under extreme conditions, i.e., the extreme nuclear charge of highly charged heavy ions. For a recently published result see Physical Review Letters 135, 113001 (2025). Another activity of the project is the completion of the CRYRING transverse electron target (see figure) and its associated ion detectors.
Left: Technical drawing of the electron target. The upper scattering chamber is mounted permanently as a part of CRYRING. The lower gun chamber can be removed, e.g., for maintenance work.Center: The electron target in the experimental section YR09 of CRYRING. Right: Enlarged view. The Faraday cage in the foreground contains the power supplies for the various voltages of the electron target's electrodes. Theses power supplies are operated on different electric potentials.
