Speaker
Description
ARI (NanoARPES and NanoRIXS) and SXN (Soft X-ray Nanoprobe) are a pair of soft x-ray beamlines under development at NSLS-II, in the framework of the NEXT-II project, which is funded by the United States Department of Energy Basic Energy Sciences (DOE-BES).
Each beamline will have two branches that will be provided with soft x-rays from two elliptically polarizing undulators, with periods of 70 and 50 mm for ARI and SXN, respectively. These branchlines lead to endstations, where the x-rays will be utilized for research in various scientific domains.
In this work, the Monte Carlo particle transport and interaction code FLUKA was employed to generate and model the Gas Bremsstrahlung and Synchrotron Radiation throughout the beam lines. The shielding design process to keep chronic ambient equivalent dose rates ALARA on the experimental floor during operation will be detailed. Furthermore, a comparison with the analytical code STAC8 will be also provided for the synchrotron radiation.
These simulation data is currently being used to validate the shielding design and the overall radiological framework in anticipation of the beamline's commissioning in 2027.