Lattice considerations for the spectrometry ring (SRing) of the HIAF project

Abstact: The spectrometry ring (SRing) is one of the rings of the next generation accelerator complex High Intensity Heavy Ion Accelerator Facility (HIAF) of Institute of Modern Physics of the Chinese Academy of Sciences. The SRing will be in operation mode as a time-of-flight mass spectrometer for short-lived nuclei. The SRings circumference is 188.7 m, the maximum magnetic rigidity is 13 T.m. The SRing is consisted by magnet systems, injection/extraction storages, stochastic cooling systems and detectors. It aims at stochastic precooling of both rare isotope and measuring nuclear masses in an isochronous mode. In order to fulfill its purpose, the ion optics can be set to different ion optical modes. This paper discusses the considerations of the injection/extraction storages of these two different modes.