A 1.2 to 6 keV soft X-ray beamline at Beijing Synchrotron Radiation Facility ☆

A new soft X-ray beamline with double-crystal monochromator and double direction focus has been constructed at Beijing Synchrotron Radiation Facility (BSRF). The beamline covers the soft X-ray energy range from 1.2 keV up to 6 keV. There are three pairs of crystals (Si (111), InSb (111), KTP(011)) for the monochromator, separately. The performance of the crystals in respect to flux, resolving power and higher orders is discussed, and some representative results from the beamline are given. The beamline is used for a variety of experiments, for example, calibration detector, measurements of optics element characteristics and soft X-ray spectroscopy (SXS).