Low-energy radioisotope beam separator CRIB

A low-energy in-flight type RI beam separator, called CRIB, has been installed for nuclear physics and nuclear astrophysics by the Center for Nuclear Study, the University of Tokyo in the RIKEN Accelerator Research Facility. It consists of a double achromatic system and an Wien filter. It is capable of providing RI beams at 5-10 MeV/nucleon. Since CRIB has been developed in the end of 2000, many proton-rich RI beams were successfully produced via the (p,n), (d,t), and (3He,n) reactions in inverse kinematics. In this paper, the design of the separator and its performance are discussed including the method of RI-beam production at low energies.