Design and Performance of the ACCULINNA-2 Fragment-Separator

This paper presents a systematic discussion of the design of all key subsystems of the ACCULINNA-2 facility: components of the primary beam line and beam diagnostics equipment, production target, and primary beam absorbers; equipment for the transport, purification, and diagnostics of the secondary beam; a RF-filter for additional beam purification; the cryogenic physical target; the forward spectrometer; and the automated control system. The characteristics of secondary beams are presented, such as angular and spatial distribution in the final focus; the quality of identification of ions by the $$\Delta $$ E-ToF method; and the yields of the certain isotopes obtained during experiments in 2018-2020 with primary beams $$^{{11}}$$ B (33.5 AMeV), $$^{{15}}$$ N (49.3 AMeV), and 32S (52.7 AMeV) while tuning to secondary $$^{8}$$ He, $$^{9}$$ Li, $$^{{11}}$$ Li, $$^{{10}}$$ Be, $$^{{27}}$$ S, and $$^{{26}}$$ P beams with different energies. A comparison of secondary beam transport with the calculated one has been performed. The possibility is substantiated to carry out experiments with light exotic ions at high accuracy of detection and measuring parameters of the incident ion on condensed targets of hydrogen and helium isotopes.