New soft X-ray beamline BL07LSU for long undulator of SPring-8:Design and status

摘要

We report the design and current status of a soft X-ray beamline BL07LSU with a 27-m-long undulator at SPring-8. The long undulator consists of eight figure-8 undulator segments, and generates circularly and linearly polarized soft X-rays. This beamline covers a wide energy range (250-2000 eV) with both high energy resolution and high photon flux. Commissioning of this beamline was started with only four undulator segments since October 2009. The resolving power was evaluated to be 10,000 at 401 eV by total-ion yield X-ray absorption spectra of N_2.