A large-volume high-pressure and high-temperature apparatus for in situ

Tomoo Katsura, Ken ichi Funakoshi, Atsushi Kubo, Norimasa Nishiyama, Yoshinori Tange, Yu ichiro Sueda, Tomoaki Kubo, Wataru Utsumi

Research output: Contribution to journalArticlepeer-review

139 Citations (Scopus)


SPEED-Mk.II, the second KAWAI-type high P-T apparatus for in situ X-ray observation that was installed at the bending magnet beam line at SPring-8, is described. The guide block system was designed so that the change of the relative dimension of the cubic compression space with press load can be minimized by repeated adjustments. The hydraulic system was designed so as to enable smooth compression and decompression. These precise controls should be advantageous for high-pressure generation, especially when sintered diamond (SD) anvils are used. An oscillation system was equipped for the first time in a large volume press, making it possible to obtain high-quality diffraction patterns even when the number of sample grains is limited. The use of the oscillation system also reduces errors in pressure determination that may be caused by insufficient averaging of diffraction angles over grains in a limited diffraction volume, because the oscillating grains should sweep through the 2 θ range that is allowed by the finite widths of the optical slits.

Original languageEnglish
Pages (from-to)497-506
Number of pages10
JournalPhysics of the Earth and Planetary Interiors
Issue number1-2
Publication statusPublished - Jun 15 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Geophysics
  • Physics and Astronomy (miscellaneous)
  • Space and Planetary Science


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