SPring-8, the large synchrotron radiation facility

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  The BL12B2 beamline is part of the Taiwan X-ray facilities at SPring-8. It is designed to provide atomic-resolution structural probing environment for biostructure and materials researches. Combining various configurations of the beamline optical components, the users can operate the beamline in either white mode, or monochromatic mode with X-ray energies from 5 to 70 keV and an energy resolution ΔE/E ∼ 10-4. Four experimental stations are attached to the beamline, including X-ray Absorption Spectroscopy (XAS), powder X-ray diffraction (PXD), X-ray scattering (XRS) and protein crystallography (PX).


  • X-ray absorption spectroscopy
  • Powder X-ray diffraction
  • High resolution X-ray scattering
  • Protein crystallography


  • Scientific field
    Nano structures, Quantum dots and quantum wells, High pressure EXAFS, Charge density wave, Protein crystallography
  • Equipment
    Curved image-plate diffractometer, 6-C Huber diffractometer


  The beamline optical design follows mostly the generic SPring-8 BM beamlines design (Fig.1). The beamline optics consists of three major components: (1) a dual-strip (Rh + Si) collimating mirror (CM) for beam collimation, higher harmonic suppression and thermal load reduction, (2) the standard SPring-8 adjustable-inclined double crystal monochromator (DCM) for photon energy selection in the energy range 5 keV to 70 keV, (3) a toroidal Rh-coated to focus focusing mirror (FM) focusing beam at PX sample position. The beam spot is measurement 250 µm × 250 µm, at PX sample position, with 2 × 1011 photons/sec/Si (111) at 12.4 keV.
  The beamline can be operated in one of the three operational modes (Fig.2):

  1. white beam mode
  2. monochromatic beam in high energy range (25 < E < 70 keV) with high energy resolution (ΔE/E ∼ 10-4)
  3. monochromatic beam in medium energy range (5 < E < 25 keV) with high energy resolution (ΔE/E ∼ 10-4)
Fig.1. BL12B2 beamline layout

Fig.1. BL12B2 beamline layout

Fig.2. Three BL12B2 operational mode

Fig.2. Three BL12B2 operational modes
(a) top view of BL12B2
(b) side views for white mode (5 ∼ 90 keV)
(c) high energy mono-mode (25 < E < 70 keV)
(d) medium energy mono-mode (5 < E < 25 keV)

  • X-rays at sample
      Energy range 7∼ 35 keV
      Energy resolution ΔE/E = 10-4
      Photon flux 1010 ∼ 1012ph/sec
      Beam size 0.25 (v) × 0.25 (H) mm2 at PX


  There are four experimental stations attached to the beamline, namely, the X-ray absorption spectroscopy (XAS), the powder X-ray diffraction (PXD), the X-ray scattering (XRS) and the protein crystallography (PX). The constructions of the stations were in sequence completed in February 2001 (for XAS, PXD and XRS) and in September 2002 ( for PX ). Figure shows the end stations at BL12B2

  • X-ray absorption spectroscopy (XAS)
  • Powder X-ray diffraction (PXD)
  • MX-ray scattering (XRS)
  • Protein crystallography (PX)


* Sorry, Some parts of results are displayed using Japanese characters.




Hirofumi Ishii
NSRRC Taiwan Beamline Office at SPring-8
1-1-1 Kouto, Sayo, Hyogo 679-5148
Phone : +81-(0)791-58-1867
Fax : +81-(0)791-58-1868
e-mail : h_ishiiatspring8.or.jp

Yen-Fa Liao
NSRRC Taiwan Beamline Office at SPring-8
1-1-1 Kouto, Sayo, Hyogo 679-5148
Phone : +81-(0)791-58-1867
Fax : +81-(0)791-58-1868
e-mail : liao.yenfaatnsrrc.org.tw

Masato Yoshimura
NSRRC Taiwan Beamline Office at SPring-8
1-1-1 Kouto, Sayo, Hyogo 679-5148
Phone : +81-(0)791-58-1867
Fax : +81-(0)791-58-1868
e-mail : yoshimuraatspring8.or.jp



Last modified 2018-12-26 09:45