An ultrahigh-vacuum apparatus for resonant diffraction experiments using soft x rays (h=300-2000 eV)

T. Takeuchi, A. Chainani, Y. Takata, Y. Tanaka, M. Oura, M. Tsubota, Y. Senba, H. Ohashi, T. Mochiku, K. Hirata, S. Shin

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13 Citations (Scopus)

Abstract

We have developed an ultrahigh-vacuum instrument for resonant diffraction experiments using polarized soft x rays in the energy range of h=300-2000 eV at beamline BL17SU of SPring-8. The diffractometer consists of modified differentially pumped rotary feedthroughs for θ-2θ stages, a sample manipulator with motor-controlled x-y-z -, tilt () -, and azimuth (φ) -axes, and a liquid helium flow-type cryostat for temperature dependent measurements between 30 and 300 K. Test results indicate that the diffractometer exhibits high reproducibility (better than 0.001°) for a Bragg reflection of α -quartz 100 at a photon energy of h=1950 eV. Typical off- and on-resonance Bragg reflections in the energy range of 530-1950 eV could be measured using the apparatus. The results show that x-ray diffraction experiments with energy-, azimuth-, and incident photon polarization-dependence can be reliably measured using soft x rays in the energy range of ∼300-2000 eV. The facility can be used for resonant diffraction experiments across the L -edge of transition metals, M -edge of lanthanides, and up to the Si K -edge of materials.

Original languageEnglish
Article number023905
JournalReview of Scientific Instruments
Volume80
Issue number2
DOIs
Publication statusPublished - 2009 Mar 9

All Science Journal Classification (ASJC) codes

  • Instrumentation

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