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BL-14A : Single Crystal Structure Analysis / Detector Development

Overview

Beamline Group 　Subcommittee 2 (X-ray diffraction and scattering)
Techniques
  • X-ray diffraction
  • Experiment for detectors to analyze a pulse-height, energy scan, and time resolved spectroscopy
Features
  • Measurement to determine the precise electron density distribution of a material by horizontal-scattering-plane-type four-circle diffractometer by vertical-linear-polarized x-ray from the vertical-type wiggler.
  • Research and development for an x-ray detector to utilize high energy x-rays of 30 ~ 80 keV and focused x-rays up to 19 keV.
Area of research
  • Crystal structure analysis by a four-circle diffractometer with APD-detector.
  • Research and development of a detector for x-ray astronomy and synchrotron x-ray experiments.
Contacts
  • Hajime SAGAYAMA hajime.sagayama(at)kek.jp
    • Please change (at) to @ in the e-mail address.
Notes

Performance

Source
  • Vertical-type wiggler
Optics
  • Monochromator [Si(111), (311), or (553)]
  • Mirror [one meter cylindrical bending with Rh coating utilized when Si(111) monochromator is selected. It can be utilized by the fixed mode of x-ray focusing point]
Energy range
  • Si(111) : 5.1 - 18.5 keV
  • Si(311) : 9.9 - 35.4 keV
  • Si(553) : 23.0 - 82.7 keV
Resolution (ΔE/E)
  • ~2 × 10-4 [at Si(111)]
Beam size
  • 2 mm (H) × less than 1 mm (V) with mirror
  • 5 mm (H) × 35 mm (V) [Maximum]
Photon flux
  • 1 × 1011 photons/s mm2 [Si(111) monochromator + mirror, max.)
Instruments
  • Horizontal-scattering-plane-type four-circle diffractometer and 8ch stacked APD detector
  • Automatic scanning stage for detector experiment and various tools for the optical experiment
Detectors
  • 8ch stacked APD detector (45-degree setting)
Remote / Mail-in
  • not available
Special notes
  • Instruments for research and development of a detector will be fixed on the optical rail (50 cm length) on the diffractometer stage or on the floor to the downstream side of ~1 m from the diffractometer stage.

More information

References

  1. Y. Satow and Y. Iitaka, Rev. Sci Instrum., 60, 2390 (1989), doi:10.1063/1.1140728 : Beamline
  2. S. Kishimoto, N. Ishizawa and T. P. Vaalsta, Rev. Sci Instrum., 68, 384 (1998), doi:10.1063/1.1148670 : APD detector
  3. T. Sakakura et al., Determination of the Local Structure of a Cage with an Oxygen Ion in Ca12Al14O33., Acta Cryst., B67, 193 (2011), doi:10.1107/S0108768111005179 : Example of diffractometer experiment
  4. S. Gunji et al., The development of gamma-ray burst polarimeter for a small satellite., SPIE, 9144, 176 (2014), doi:10.1117/12.2054708 : Example of detector experiment

Publications

KEK-PF Publication Database (Publications of BL-14A)

Last updated: 2023-11-8

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