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Journal Articles

The Design of the neutron total scattering spectrometer for hydrogenous materials at J-PARC-JSNS

Suzuya, Kentaro; Kameda, Yasuo*; Otomo, Toshiya*; Yoshida, Koji*; Ito, Keiji*; Fukunaga, Toshiharu*; Misawa, Masakatsu*

Journal of Neutron Research, 13(1-3), p.123 - 128, 2005/03

https://doi.org/10.1080/10238160412331299898

The design, performance, philosophy, lessons learned and advantages of the neutron total scattering spectrometer for hydrogenous materials, FAST, under consideration for the J-PARC-JSNS, are described. In particular, novel instrumentation concept such as the small fractional scattered neutron flight path, $$gamma$$= L$$_{2}$$/(L$$_{1}$$+L$$_{2}$$), where L$$_{1}$$ is the incident flight path, moderator to sample, L$$_{2}$$ is the scattered neutron flight path from sample to detector, is presented and their expected performance at the JSNS is considered.

Journal Articles

Inelasticity effect on neutron scattering intensities of the null-H$$_{2}$$O

Kameda, Yasuo*; Sasaki, Motoya*; Usuki, Takeshi*; Otomo, Toshiya*; Ito, Keiji*; Suzuya, Kentaro; Fukunaga, Toshiharu*

Journal of Neutron Research, 11(3), p.153 - 163, 2003/09

https://doi.org/10.1080/10238160310001657817

We describe results of time-of-flight (TOF) neutron diffraction of the liquid water null-H$$_{2}$$O in order to investigate the effect of both the scattering angle and the neutron flight path ratio to the observed self-scattering intensities. An empirical inelasticity correction procedure is proposed using the self-scattering intensity observed for the null-H$$_{2}$$O.

Oral presentation

Present status of J-PARC high-pressure neutron diffractometer PLANET and application to the structure analysis of disordered materials

Hattori, Takanori; Sano, Asami; Suzuya, Kentaro; Funakoshi, Kenichi*; Abe, Jun*; Machida, Shinichi*; Ouchi, Keiichi*; Okazaki, Nobuo*; Kameda, Yasuo*; Otomo, Toshiya*

no journal, , 

PLANET is the beamline dedicated for the high-pressure experiments. The operation has been started at JFY 2013, and now many users are coming to use. In this talk, we introduce the current state of the PLANET and the example of the structure analysis of disordered materials. PLANET adopted the double staged compression system of the multi anvil 6-6, and enables the data collation at 10 GPa and 2000 K. To extend accessible PT range, we newly introduce another compression system of multi-anvil 6-8, and succeeded in generating 16 GPa and 1273 K. In addition, the PLANET is designed so that we can analyze the structure of liquid under pressure. In the analysis, the program for liquid analysis developed at BL21 NOVA is used. Here, we briefly introduce the reliability of the results and the pressure evolution of the silica glass.

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