In China, the Heavy Ion Research Facility at Lanzhou (HIRFL) is one major national research facility focusing on nuclear physics, atomic physics, heavy ion applications and interdisciplinary researches. A series of remarkable results have been obtained at HIRFL. Based on the developments and experience with heavy ion beam accelerators, a new project HIAF was proposed by IMP in 2009. The facility is being designed to provide intense primary and radioactive ion beams for nuclear physics, atomic physics, application research sciences and so on. The schematic layout of HIAF project is shown in figure.
The HIAF project consists of ion sources, linac accelerator, synchrotrons and several experimental terminals. The Superconducting Electron-Cyclotron-Resonance ion source (SECR) is used to provide highly charged ion beams, and the Lanzhou Intense Proton Source (LIPS) is used to provide H2+ beam. The superconducting ion Linac accelerator (iLinac) is designed to accelerate ions with the charge-mass ratio Z/A=1/7 (e.g. 238U34+) to the energy of 17 MeV/u. Ions provided by iLinac will be cooled, accumulated and accelerated to the required intensity and energy (up to 1×1011 and 800 MeV/u of 238U34+) in the Booster Ring (BRing), then fast extracted and transferred either to the external targets or the Spectrometer Ring (SRing). It is also planned to equip BRing with a slow extraction system for a wide range of applied researches in biology and material science. As a key part of the HIAF complex, SRing is designed as a multifunction experimental storage ring. A TOF detector system will be installed for nuclei mass measurements with isochronous mode. An electron target with ultra-low temperature electron beam will be built for Dielectronic Recombination (DR) experiments. Both stochastic cooling and electron cooling systems are considered to be equipped in order to provide high quality beams for experiments and compensate energy losses of internal target experiments. Highly purified radioactive beams can be extracted from SRing for nuclear physics experiments.