09A1 U50 - SPEM


The BL09A beamline is a high-performance U5-SGM undulator beamline, which covers photon energies from 60 to 1400 eV. The photon source is generated by an undulator of a 5-cm magnet period. A spherical grating monochromator with four interchangeable gratings of ruling densities of 285, 400, 800, and 1600 ℓ/mm, is used to provide the photons desired. The energy resolving power at 400 eV is better than 10000 with slit openings set at 10 mm. The average photon flux is about 1012 ph/sec/200mA, as measured with slit openings set at 60 mm. The focused beam spot size is about 100 mm ´ 150 mm. The beamline bifurcates into two branches after the horizontal refocusing mirrors. Branch 1 has a dedicated Scanning Photoelectron Microscopy (SPEM) end-station, while branch 2 accommodates user-brought end-stations capable of XPS, AES, photoabsorption, and other spectroscopies. Light can be directed to only one of the branches at any given time.

Areas of Research

Spectroscopy / Microscopy: PES, XPS, XAS, AES

Light Source

TypeU5 Undulator
Source SizeHorizontal αh = 0.051 mm
Vertical αv = 0.047 mm
Energy Range60~1400 eV
Period Length5 cm
Number of Periods76
Brilliance4 × 1015 photons/sec.mrad2/0.1%BW/200mA
Power1920 W

Find a Beamline

09A1 Home



BL Schedule

Optical Layout




+886-3-578-0281 Ext. 1101

BL Spokesperson

Chen, Chia-Hao (陳家浩)
+886-3-578-0281 Ext. 7325

BL Manager/Local Contact

Hsieh, Shang-Hsien (謝尚憲)
+886-3-578-0281 Ext. 3267


  • X-ray Photoelectron Spectroscopies (XPS)


  • Biochemistry

General Information

  • Source: U50
  • Energy Range: 60~1400 ev
  • Focused Spot Size: 0.1 × 0.15 mm
  • Status: Operational

National Synchrotron Radiation Research Center

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