Recent Progress on the Development of Li-8 Radioactive Ion Beam Based on 100-Mev Proton Linear Accelerator at KOMAC

The beta-detected nuclear magnetic resonance (β -NMR) technique is a novel method that obtains depth-resolved information on samples by observing the asymmetric beta decay of nuclear probes. Although the beta-detected NMR has several advantages over the conventional NMR techniques, the number of user facilities in the world is severely limited. At the site of Korea Multi-purpose Accelerator Complex (KOMAC), we initiated a research project to develop a radioactive ion (RI) beam facility dedicated for the future beta-detected NMR facility at KOMAC based on a 100-MeV proton linear accelerator. In this endeavour, we developed a prototype of a target-ion-source (TIS) composed of low-Z production targets, target container, target heater, high-current feed through, and hot surface ion source. In recent on-line experiments, we have demonstrated that a Li-8 beam of the order of 106 pps could be extracted with the prototype design of the TIS. Here, we present the recent progress of the RI beam development study.