Speaker
Description
A compact 3 GeV next-generation synchrotron radiation facility, NanoTerasu, is currently constructed at Aobayama New campus of Tohoku University in Miyagi prefecture, Japan. NanoTerasu provides both soft and hard x-rays, and is to be operational from April of 2024 with 10 beamlines; it will have 28 beamlines in the future. The electrons are accelerated up to 3 GeV by LINAC, and injecting into the storage ring, then extracted x-rays by insertion devices. NanoTerasu is the first facility in Japan where an experimental area is set to a non-restricted area under the policy that "users can use this facility as much as possible without the license of radiation workers". To achieve that purpose, gas bremsstrahlung radiation (GB) that is generated by interacting electrons with residual gas in the beam pipe must be shielded. We have saved the costs for shielding of GB for all beamlines by optimizing local shields with a Monte-calro simulation. Synchrotron radiation also must be considered even though it has lower energy.
We present shielding designs for beamlines including their optical and experimental hatches, and local shields.