25A Coherent X-ray Scattering

Optical Layout

The beamline optical configurations are shown as the figures below. The Double Crystal Monochromator (DCM) of CXS beamline is with two sets of switchable crystals for high flux mode and high energy resolution mode operating respectively. The focusing optics are integrated within two focusing systems. The 1st focusing system hosts the Vertical Compound Refractive lenses (V-CRL) and the 1st Horizontal Focusing Mirror (HFM1); the Vertical Focusing Mirror/Vertical Deflective Mirror (VFM/VDM) and the 2nd Horizontal Focusing Mirror (HFM2) are installed in the 2nd focusing system. The photon beam is focused at Horizontal Secondary Source (HSS) slit by HFM1. The beam size in horizontal can be varied by the opening of the HSS slit. The vertical beam size is changed by using different setup of the optics. Using VFM, the beam size is 1 μm by 1 μm (Fig.1) and 10 μm by 10 μm beam size is performed with V-CRL and VDM (Fig. 2).


Optical layout 1

Fig. 1. Beamline optical configuration for 1 μm by 1 μm beam size.

Optical layout 2

Fig. 2. Beamline optical configuration for 10 μm by 10 μm beam size (under commisioning).

Find a Beamline

25A Home




BL Schedule

Optical Layout



Other BL Info



BL Spokesperson

—Yu-Shan Huang (黃玉山)
Ext. 7332
Mobile: +886-912536463

BL Local Contact/Manger

Jhih-Min Lin (林智敏)
Ext. 7342
Mobile: +886-938114881


  • Coherent Diffraction Imaging (CDI)
  • X-ray Photon Correlation Spectroscopy (XPCS)
  • Small Angle X-ray Scattering (SAXS)


  • Materials science
  • Polymer and soft matter
  • Nanotechnology

General Information

  • Source: 25A
  • Energy Range: 5.5-20 keV
  • Focused Spot Size: 1 x 1 μm² or 10 x 10 μm²
  • Status: operational

National Synchrotron Radiation Research Center

101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, Taiwan 30076