Abstract

This contribution describes the conceptual design for a simple and powerful beamline for small angle X-ray scattering (SAXS) at the High Energy Photon Source (HEPS) in Beijing, China. The high energy and low emittance feature of the HEPS are utilized to simplify the beamline and increase the beam flux and stability by omitting the use of a monochromator and a focusing mirror. The basic design idea is that the pink beam from an in-air planar undulator is directly deflected by a V-shaped deflector and collimated by a set of three-slits to irradiate the sample. The scattering signals are recorded by one or two detectors in a vacuum tube. The potential merits of the beamline are its simple structure, high stability, wide flux range, low background, and circular beam spot.