Speaker
Description
NanoTerasu is a highly brilliant synchrotron light source mainly focusing on soft to tender X-ray region. The NanoTerasu compact accelerator system with high performance consists of a storage ring with a circumference of 349 m and a 3-GeV linear accelerator with length of 110 m. The linear accelerator is designed not only for full energy injection to the storage ring, but also for future extension to soft-X ray free electron laser. The prominent feature of the injector system is a low-emittance compact rf electron gun employing transparent-grid scheme in a gridded thermionic cathode. The low-emittance beam from the electron gun is bunch compressed to 5 ps with a sub-harmonic buncher and accelerated up to 3-GeV with an S-band accelerating structure and 40 of 2 m long C-band accelerator structures. Since the commissioning of the linear accelerator started on April 2023, a 3 GeV electron beam with bunch charge of 0.3 nC and a normalized emittance of 10 micro-mrad has been supplied to the storage ring. This system, which is compact and simple configuration, yet produces a highly brilliant and stable electron beam, will be a good example for future electron accelerators.
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