20A1 BM - (H-SGM) XAS


The HSGM beamline is one of the earlier versions of the Dragon beamline using spherical optical elements and a movable exit slit to maximize the photon throughput and energy resolving power. It consists of one horizontal focusing mirror (HFM), one vertical focusing mirror (VFM), one spherical grating monochromator with 4 gratings, and one toroidal refocusing mirror. This beamline covers the spectral range from 60 eV to 1250 eV, with an average energy resolving power of 5000. The end-station is primarily designed for studying condensed phase photochemistry and the electronic structures of new materials.

This beamline has been operational since 1993. Studies of desorption dynamics of molecular adsorbates, relaxation dynamics of core-excited molecules, synchrotron radiation induced surface photochemistry, electronic structure of molecular films, biomaterials, catalytic materials, sensor materials, energy-harvesting and -storing materials like solar cells, batteries etc. have been performed at this beamline.

Areas of Research

X-ray Absorption Spectroscopy

Light Source

Type1.5 GeV Bending Magnet
Source SizeHorizontal αh = 0.12 mm
Vertical αv = 0.055 mm
Energy Range60 ~ 1250 eV

Find a Beamline

20A1 Home



BL Schedule

Optical Layout





+886-3-578-0281 Ext. 1201

BL Spokesperson

Haw, Shu-Chih (何樹智)
+886-3-578-0281 Ext. 5102、3152

BL Manager/Local Contact

Chang, Lo-Yueh (張羅嶽)
+886-3-578-0281 Ext. 3267


  • Soft X-ray Absorption Spectroscopy (TEY, TFY, PFY)


  • Energy-related materials
  • Catalytic materials
  • Electron-correlated materials
  • Molecular films
  • Biomaterials

General Information

  • Source: BM
  • Energy Range: 60~1250 ev
  • Focused Spot Size: 1.5 × 1 mm
  • Status: Operational

National Synchrotron Radiation Research Center

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