Commissioning and Operation of a 3 GeV Synchrotron Light Source NanoTerasu

Abstract

NanoTerasu is a highly brilliant synchrotron light source mainly focusing on soft to tender X-ray region. The NanoTerasu accelerator system consists of a 3 GeV storage ring based on four bends achromat lattice with a circumference of 349 m and a 3 GeV linear injector accelerator with length of 110 m. The installation of the accelerator system started in Dec. 2021 and successfully finished by the end of May 2023. The commissioning of linear accelerator started on Apr. 17th and a 3 GeV electron beam was successfully delivered to a beam dump in 10 days. The commissioning of storage ring started on June 8th and a 3 GeV electron beam was soon circulated in the storage ring roughly 300 times with storage ring cavity off. The first stored beam was observed on June 18th with storage ring cavity on and the first light from a 3 pole wiggler was observed as well. The present stored electron beam current reaches 200 mA after 40 Ah total dose and preliminary horizontal beam emittance of 1.1 nm.rad under an assumption of 0.097% energy spread is measured with synchrotron radiation from a 3 pole wiggler.