Performance of high-resolution position-sensitive detectors developed for storage-ring decay experiments

•Position-sensitive detectors were developed for storage-ring decay spectroscopy.•Fiber scintillation and silicon strip detectors were tested with heavy ion beams.•A new fiber scintillation detector showed an excellent position resolution.•Position and energy detection by silicon strip detectors enable full identification. As next generation spectroscopic tools, heavy-ion cooler storage rings will be a unique application of highly charged RI beam experiments. Decay spectroscopy of highly charged rare isotopes provides us important information relevant to the stellar conditions, such as for the s- and r-process nucleosynthesis. In-ring decay products of highly charged RI will be momentum-analyzed and reach a position-sensitive detector set-up located outside of the storage orbit. To realize such in-ring decay experiments, we have developed and tested two types of high-resolution position-sensitive detectors: silicon strips and scintillating fibers. The beam test experiments resulted in excellent position resolutions for both detectors, which will be available for future storage-ring experiments.