Inquiry number

INS-0000000364

ABSTRACT

BL23SU is a soft X-ray undulator beamline of Japan Atomic Energy Agency (JAEA). It is used for research areas such as fundamental heavy-element research and environment and energy materials. The experimental stations are located at the experimental hall and the RI building.

AREA OF RESEARCH

• Surface chemistry with supersonic molecular beam
• Photoelectron spectroscopy
• Magnetic circular dichroism
• Scanning transmission X-ray microscopy

KEYWORDS

• Scientific field
  Surface chemistry, Chemical reaction dynamics, Real-time in-situ photoemission spectroscopy (Station 1)
  Photoelectron spectroscopy, Strongly-correlated electron system, Actinide compounds (Station 2)
  MCD, XAS, Strongly correlated electron system, Magnetic property (Station 3)
  Scanning Transmission X-ray Microscopy, Microprobe analysis of Actinides (Station 4)

SOURCE AND OPTICS

• Light source
  Twin helical undulators (THU), which produce circularly-polarized soft X-ray synchrotron radiation, were used as a light source. Polarization of light can be switched with the repetition frequency of 10 Hz by the kicker magnet.

• Schematic view of beamline and monochromator system
  The main optics is a varied - line - spacing plane grating type (VLSPG) monochromator. This consists of an entrance slit, spherical mirrors, varied-line-spacing plane gratings, an exit slit, a post-focusing mirror, and refocusing toroidal mirrors. The soft X-rays are guided over 120 m from the undulator, crossing the two areas (experimental hall and RI hall).

Undulator period	75.2 mm
Number of periods	17

• X-rays at sample

  Energy Range	0.4 ~ 1.8 keV
  Energy resolution	E/ΔE > 10000
  Photon flux	1012 ph/s/0.01%b.w. at 700 eV
  Beam size	< 200 µm in diameter

Fig. 1 Schematic view of BL23SU and the monochromator system

Optics : Distance from the source	Optical element	Function
40 m	Cylindrical mirror (Mv)	Vertical focusing at the entrance slit
42.5 m	Cylindrical mirror (Mh)	Deflection and horizontal focusing
50 m	Entrance slit (S1)
60.1 m	Spherical mirror (M1, M2)
61.91 m	Constant deviation monochromator with varied-space plane gratings (VLSPG)	Monochromatizarion
71.91 m	Exit slit (S2)
73.91 m	Cylindrical mirror (M3)	Post focus
114 m	Troidal mirror (M4)	Refocus

EXPERIMENTAL STATIONS

• Surface chemistry experimental station
• Photoelectron spectroscopy station
• MCD station
• Scanning transmission X-ray microscopy station

PUBLICATION SEARCH

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BL23SU PUBLICATION SEARCH

CONTACT INFORMATION

Please note that each e-mail address is followed by "@spring8.or.jp."

Shin-ichi FUJIMORI
Japan Atomic Energy Agency, Materials Sciences Research Center
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148
Phone : +81-(0)791-58-0820
Fax : +81-(0)-791-58-2620
e-mail : fujimori

Website

https://msrc.jaea.go.jp