BL23SU OUTLINE
問い合わせ番号
INS-0000000364
ABSTRACT
BL23SU is a soft X-ray undulator beamline of Japan Atomic Energy Agency (JAEA) . It has been constructed for a wide variety of scientific research areas, surface chemistry, biophysical spectroscopy and solid state physics. The experimental stations are located at the experimental hall and the RI building.
AREA OF RESEARCH
- Surface chemistry with supersonic molecular beam
- Biophysical spectroscopy
- Photoelectron spectroscopy (activity at RI laboratory)
- Magnetic circular dichroism (activity at RI laboratory)
KEYWORDS
- Scientific field
Surface chemistry, Chemical reaction dynamics, Real-time in-situ photoemission spectroscopy (Station 1)
DNA damages, Transient radical species, Photon stimulated desorbed ions (Station 2)
Photoelectron spectroscopy, Strongly-correlated electron system, Uranium compounds (Station 3)
MCD, XAS, Strongly correlated electron system, Magnetic property (Station 4)
SOURCE AND OPTICS
- Light source
A double-array variable undulator, so-called APPLE-2 (advanced planar polarized light emitter) or Sasaki-type which produces both linearly and circularly polarized soft X-rays is used as a light source. ID23 can generate a linearly (horizontal and vertical plane), an elliptically or a circularly polarized radiation by phase shift. The most unique performance of the undulator is the switching of right-circular-polarization(RCP) and left-circular-polarization (LCP) radiation by periodic phase shift of the magnet rows. The highest mechanical switching rate is at the frequency up to 0.5 Hz.
- 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 120 mm Number of periods 16 Tunable energy range 0.5 ∼ 1.5 keV
(Circular polarization)Brilliance 3 × 1017 ph/s/mrad2/mm2/0.1%b.w.
at 1 keV (Circular polarization, photon energy)
- X-rays at sample
Energy Range 0.35~ 1.8 keV Energy resolution E/ΔE > 10000 Photon flux 1011 ph/s/0.02%b.w. Beam size < 0.2 diam.
Fig. 1 The magnetic structure of the APPLE II consists of two pairs of arrays of permanent magnets
| 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
- Biophysical spectroscopy station
- Photoelectron spectroscopy station
- MCD 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, Sector of Nuclear Science Research Materials Sciences Research Center
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148
Phone : +81-(0)791-58-2604
Fax : +81-(0)-791-58-2620
e-mail : fujimori