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BL11 PLANET High-Pressure Neutron Diffractometer


Observe the pressure induced change of structure of materials
Reproduce the interior of the Earth on the ground

Research ObjectivesBehaviour of the hydrogen in the materials under high-pressure and temperature condition, State of the water and hydrogen in the deep Earth, Pressure-induced structural change of liquid and amorphous solids, Structural change of ice at low-temperature and high-pressure condition.
FeaturesGeneration of high-pressure and high-temperature condition (10 GPa, 2000℃) with the six-axis multi-anvil press ATSUHIME, Capable of obtaining clean patterns with narrow beam collimation.

PLANET is a powder diffractometer which specializes in high-pressure experiments. The beamline is equipped with two 90-degree detector banks for diffraction and a neutron imaging camera for radiography. Incident and receiving collimators enable us to obtain scattering only from the sample without contamination from surrounding materials, such as a heater and a sample container. Contamination-free diffraction patterns allow the precise determination of crystal structures, amorphous solids and liquids — in situ under high-pressure and high-temperature conditions. Several high-pressure devices, such as the 6-axis multi-anvil press “ATSUHIME”, a Paris-Edinburgh press and the “MITO system” are available for use on PLANET depending on the pressure/temperature conditions of interest. With these devices the current range in pressure/temperature conditions available on PLANET covers 0-20 GPa and 77-2000 K.

6-axis multi-anvil press "ATSUHIME". Sano et al. Rev. Sci. Instrum., 85, 113905 (2014).


Last Update: 2016-10-11

InstrumentHigh-Pressure Neutron Diffractometer (PLANET)
Overview of instrumentPowder diffractometer for in-situ high-pressure observation
ModeratorDecoupled Moderator
Incident neutron wavelength0.3Å~5.8Å
d-range0.2Å~4.1Å(Single frame)
0.2Å~8.2Å(Double frame)
Neutron intensity1.0×108 n/s/cm2 (@1MW)
Beam size15mm × 15mm at maximum
Detectors3He PSD (90° ± 11.3° in holizontal, 0° ± 34.6° in vertical)
Sample environmentSix-axis multi-anvil press "ATSUHIME" (10GPa, 2000K)
Paris-Edingburgh press "VX4" (20 GPa, room temperature)
Low-temperature press "Mito system" (5GPa, 77K)
Radial collimators (gauge length: 3mm & 1.5mm)
Other information for user's convenience 

Beamline Team

ContactTakanori HATTORI (J-PARC Center, JAEA)
Secondary contactAsami SANO-FURUKAWA (J-PARC Center, JAEA)
Ken-ichi FUNAKOSHI (Neutron Science and Technology Center, CROSS)
Jun ABE (Neutron Science and Technology Center, CROSS)
Shinichi MACHIDA (Neutron Science and Technology Center, CROSS)
Tetsuya KURODA (Neutron Science and Technology Center, CROSS)
Nobuo OKAZAKI (Neutron Science and Technology Center, CROSS)
Keiichi OHUCHI (Neutron Science and Technology Center, CROSS)

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