laser photons to the X-ray regime, coherent radiation by channeling of relativistic ions (at the APPA cave ), electron-ion recombination, and electron and photon spectroscopy will be used and will give hitherto [...] the heavy ion storage ring experiments at the HESR and to the transfer of CRYRING to the current ESR . Whereas the high energy APPA cave offers direct SIS100 beams of highly charged heavy ions up to 10 [...] state QED and nuclear parameters, exotic nuclear decay modes in highly-charged ions, and parity non-conservation in high-Z ions and extreme electromagnetic fields. As part of the Swedish in-kind contribution