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BL09XU OUTLINE

Inquiry number

INS-0000000302

ABSTRACT

  This beamline is a standard X-ray beamline with a 32 mm-period linear undulator and a liquid-nitrogen cooled monochromator. Intense X-rays up to 80 keV can be produced and more than 30 kinds of nuclear levels exist in this energy range mainly. The following researches of nuclear resonant scattering are performed using the high-resolution optics and the time differential measurements in the several-bunch operation; Study of dynamics in materials using nuclear inelastic scattering; Time domain Mössbauer spectroscopy; Coherent X-ray optics using nuclear resonant scattering (NRS).
  The following researches are also performed using the multi high-precision goniometer system; NEET, surface study; X-ray non-linear phenomena and; Residual strain analysis.

AREA OF RESEARCH

  • Lattice dynamics by using nuclear inelastic scattering
  • Time domain Mössbauer spectroscopy, especially under the extreme conditions
  • Coherent X-ray optics using nuclear resonant scattering
  • Nuclear excitation by electron transition (NEET)

KEYWORDS

  • Scientific field
    Mössbauer spectroscopy, Phonon density of states, NEET, Surface, Non-linear, Residual strain
  • Equipment
    High-resolution monochromator, High precision optics, Avalanche photodiode, Fast timing electronics

SOURCE AND OPTICS

  • Schematic view of beamline
  • X-rays at Sample

    Energy range 6.2 ∼ 100 keV
    Total flux 4 × 1013 phs/sec
    (E = 14.4 keV @ 100 mA)
    Beam size (2σ) 1.3 mm (h) × 0.85 mm (v)
    Divergence (2σ) 0.04 mrad (h) × 0.02 mrad (v)

EXPERIMENTAL STATIONS

 We have two experimental hutches. High-resolution monochromators used for the research using nuclear resonant scattering are arranged on these high precision goniometers In the Experimental Hutch 1. Three kinds of high-resolution monochromators for 14.4 keV X-rays with different energy resolutions and that for 6.2, 21.5, 22.5 and 29.8 keV X-rays are available at BL09XU. Their specifications and the measured performance are listed in Table 1, respectively. Samples are set with temperature control in Experimental Hutch 2. A nuclear resonant inelastic scattering spectrum measured by iron foil is shown in Fig.2

  • Table 1. High-resolution monochromators available at BL09XU
    Nucleus Reflections E (keV) ΔE (meV) Photons/sec/100 mA
    57Fe Si 511 - Si 975 (2 nested channel-cut) 14.4 3.5 4 × 109
    57Fe Si 511 - Si 975 (2 nested channel-cut) 14.4 2.5 1.6 × 109
    57Fe Si 975 - Si 975 (2 flat crystals) 14.4 1.6 5 × 108
    151Eu Si 440 - Si 12 12 8 - Ge 422 (3 flat crystals) 21.5 1.8 4 × 108
    149Sm Si 440 – Si 16 8 8 – Ge 422 (3 flat crystals) 22.5 1.5 1. 4 × 109
    181Ta Si 311 – Si 511 – Si 511 (3 flat crystals) 6.2 10.5 4 × 108

Fig.1. Schematic side view of high precision goniometers

  • Specifications of experimental station
    • Experimental tables
      • 1st : size 130 × 160 × 110 cm3
      • 2nd : size 180 × 120 × 110 cm3
      • covered by plastic hutch for precise temperature control
    • Precision goniomete
      • horizontal axis, driven by stepping motor
      • stroke : 6 degree
      • resolution : 0.005 arcsec/pulse
    • 4-circle diffractometer
    • XZ table, XY table
    • 4-jaw slit
    • Vacuum pump (Scroll and TMP pump)
    • Cryostat
    • Room temperature controller
    • Avalanche photodiode detector, p-i-n photodiode detector, Scintillation detector, Ionization chamber
    • NIM Bin, Fast AMP, Power supply, Counter, MCA, Current AMP etc.
    　　　
  • Available Device under collaboration with Prof. Kobayashi (Hyogo Univ.)
    • Super Conducting Magnet
      　Magnetic fields　　　　　　7 T
      　Lowest Temperature 　　1.5 K
    • Laser Heating system for DAC
      　Highest Temperature　　1500 K

    Fig.2. Measured nuclear resonant inelastic scattering spectrum of the α-iron foil

PUBLICATION SEARCH

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CONTACT INFORMATION

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

Yoshitaka YODA
SPring-8 / JASRI
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198
Phone : +81-(0)791-58-0832
Fax : +81-(0)791-58-0830
e-mail : yoda

Yoshiharu SAKURAI
1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198
Phone : +81-(0)791-58-0832
Fax : +81-(0)791-58-0830
e-mail : sakurai

Last modified 2012-04-24 16:45
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