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BL18 SENJU Extreme Environment Single Crystal Neutron Diffractometer

Summary

Explore wide 3-dimensional reciprocal space simultaneously

Research ObjectivesReveal the origin of functionalities of organic/inorganic materials from the structural point of view.
FeaturesDetermine precise positions of light atoms such as hydrogen and oxygen atoms as well as complicated magnetic structures by highly efficient measurements under multiple extreme environments.

SENJU, a TOF-Laue single crystal neutron diffractometer at the BL18 of MLF/J-PARC, was designed for precise crystal and magnetic structure analyses under multiple extreme environments such as low-temperature, high-pressure and high-magnetic field, with the capability of measuring small samples, less than 1.0 mm3 in volume.

Specification

Last Update: 2016-10-13

InstrumentExtreme Environment Single Crystal Neutron Diffractometer
Overview of instrumentDedicated to precise crystal and magnetic structure analyses under combined special environments targetting inorganic and small organic molecular materials.
BeamlineBL18
ModeratorPoisoned decoupled hydrogen moderator
Incident neutron wavelength0.4 ~ 4.4 Å (1st frame)
4.6 ~ 8.8 Å (2nd frame)
Neutron intensity (@sample position @1MW)0.6 × 106 n/s/mm2 (standard mode)
1.3 × 106 n/s/mm2 (high-intensity mode)
Sample position34.8 m
Maximum unit cell dimension amax50 Å
Sample sizeCurrent recommendation > 1 × 1 × 1mm3 (0.5 × 0.5 × 0.5mm3 @1MW)
Detection angleHorizontal -13° ~ -167°, +58° ~ +167°
Vertical -29° ~ +29°
Sample environmentOne to two days for a set of data for one condition.
RT goniometer, Closed cycle refrigerator (4 K)
Magnet (7 T) w/ dilution refrigerator(~50 mK)
Nb furnace ( < 1500K)

Beamline Team

ContactTakashi OHHARA (J-PARC Center, JAEA)
Secondary contactRyoji KIYANAGI (J-PARC Center, JAEA)
Akiko NAKAO(Neutron Science and Technology Center, CROSS)
Koji MUNAKATA(Neutron Science and Technology Center, CROSS)
Kentaro MORIYAMA(Neutron Science and Technology Center, CROSS)
Itaru TAMURA (Department of Research Reactor and Tandem Accelerator/J-PARC Center, JAEA)
Koji KANEKO (Materials Sciences Research Center/J-PARC Center, JAEA)

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