Speaker
Description
Exotic nuclei far away from the valley of β-stability are characterized by tiny production cross-sections and short half-lives, therefore highly efficient and fast mass measurement techniques are required. The Spectrometer Ring (SRing) at the HIAF provides such conditions for accurate mass and unique half-life measurements of exotic nuclei. The SRing is designed as a multi-function experimental storage ring, which will be operated in different modes. The high priority research program of the SRing is to measure systematically nuclear masses in broad regions. Firstly, the isochronous mode of the SRing is used as a novel isochronous mass spectrometer (IMS) named the Bρ-defined IMS with two TOF detectors for very short-lived exotic nuclei. Secondly, the normal mode is designed to prepare high-quality Rare Isotope Beams (RIBs) for Schottky mass spectrometry experiments (SMS) and in-ring nuclear and atomic physics experiments. The structure of the ring lattice and its ion-optical properties in the isochronous mode are described. Nonlinear ion-optical characteristics and their influence on an achievable mass resolving power in an isochronous mode operation of the SRing are discussed.
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