The experimental setup for studies of reactions with relativistic radioactive beams R3B is part of the FAIR project. The aim of the R3B international collaboration is to develop and construct a versatile reaction setup with high efficiency, acceptance, and resolution for cinematically complete measurements of reactions with high-energy radioactive beams. The setup will be located at the focal plane of the high-energy branch of the Super-FRS. The experimental configuration is based on a concept like the existing R3B/LAND reaction setup at GSI introducing substantial improvement with respect to resolution and an extended detection scheme, which comprises the additional detection of light (target-like) recoil particles and a high-resolution fragment spectrometer. The setup is adapted to the highest beam energies (corresponding to 20 Tm magnetic rigidity) provided by the Super-FRS capitalizing on the highest possible transmission of secondary beams.
The R3B setup will cover experimental reaction studies with exotic nuclei far off stability, thus enabling a broad physics programme with rare-isotope beams with emphasis on nuclear structure and dynamics. Astrophysical aspects and technical applications are also concerned. To cover such a large physics programme several different detection subsystems as well as sophisticated DAQ system and data-analysis software are planned (see below). The work is performed inside the R3B collaboration which includes more than 50 different institutes from all over the world.