부산대학교 도서관

A new 3 GeV light source named “NanoTerasu” is under construction at Aobayama new campus of Tohoku university. NanoTerasu will form a photon science platform together with SPring-8, which covers a wide spectral range from UV to hard X-rays, by delivering brighter and more coherent soft to tender X-rays with superior stability and reliability. Installation of the accelerator system is in progress for the first light in 2023. NanoTerasu employs a four-bend achromat lattice using combined-function bending magnets to achieve a low emittance of about 1 nmrad with a small circumference of 349 m and a beam current of 400 mA. The storage ring consists of 16 cells to provide 28 user beamlines. This paper presents an overview of NanoTerasu and describe details of the storage ring vacuum system.