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BL22 RADEN Energy Resolved Neutron Imaging System

Summary

Visualization of crystal, elemental and magnetic information of materials by energy-resolved neutrons

Research ObjectivesThe following three imaging options are available in addition to conventional neutron radiography. 1) Bragg-edge imaging: crystal structure, crystalline phase, texture, microstructure, strain, preferred orientation and crystalline size in a polycrystalline material, 2) Polarized neutron imaging: Vector information of magnetic fields, 3) Resonance imaging: elements and temperature.

RADEN is the first energy-resolved neutron imaging instrument using pulsed neutrons in the world. According to the pulsed neutrons nature, it becomes possible to visualize spatial distribution of various quantities concerning crystallographic structure, elemental concentration, temperature, and magnetic field, together with the normal neutron radiography and tomography.

Specification

Last Update: 2014-09-30

InstrumentEnergy Resolved Neutron Imaging System (RADEN)
Overview of instrumentPulsed neutron imaging instruments for both the energy-resolved neutron imaging experiments, e.g., Bragg-edge imaging, neutron resonance absorption imaging, and polarized neutron imaging, and state-of-the-art neutron radiography and tomography experiments.
BeamlineBL22
ModeratorDecoupled hydrogen moderator
Incident neutron wavelengthλ < 8.8 Å (L = 18m, 25 Hz), λ < 6.8 Å (L = 23m, 25 Hz)
Resolution (Δd/d)~0.2% (minimum)
Neutron intensity (@sample position @1MW)9.8×107 n/s/cm2 (L/D = 180), 5.8×107 n/s/cm2 (L/D = 230)
Neutron beam size (@sample position)Maximum 300 × 300 mm2
DetectorsImaging type detector
- Cooled CCD (2k x 2k pixels) + ZnS(Li) scintillator
- Toshiba color-II + CMOS cameras
Counting type imaging detectors
- GEM (10B coated gas-electron-multiplier detector)
- μ-NID (micro-pixel chamber (μPIC) based neutron imaging detector with 3He gas)
- Li-glass pixel scintillator with multi-anode photomultiplierOptional detectors
- Gamma-ray detectors (Ge , plastic scintillator)
- 3He PSD tubes for diffraction measurements
Ancillary equipment and sample environmentFilters (Cd, Bi, Pb, BK7), Two Rotary Collimators, Double disk chopper (Band definition), T0 chopper, B4C slit,
Large sample stage (L = 23 m, load capacity 1 ton),
Medium sample stage (L = 18 m, load capacity 650 kg),
Small sample stage (load capacity 10 kg),
Sample chamber (600 x 600 x 900H mm, +10 ~ +40 ºC, 20 ~ 80%RH theta stage with load capacity of 30 kg)
Sample chamber (600 x 600 x 900H mm, -10 ~ +80 ºC, theta stage with load capacity of 30 kg)
Polarization analysis system using polarizing supermirrors and magnetic shield
Other information for user's convenienceVarious L/D values can be selectable (180 ~ 7500).
The largest beam size and the highest beam intensity in MLF are available.
Flexible arrangement of experimental apparatus is available.

Beamline Team

ContactTakenao SHINOHARA (J-PARC Center, JAEA)
Secondary contactTetsuya KAI (J-PARC Center, JAEA)
Kenichi OIKAWA (J-PARC Center, JAEA)
Takeshi NAKATANI (J-PARC Center, JAEA)
Mariko SEGAWA (Nuclear Science and Engineering Center, JAEA)
Hirotshi HAYASHIDA (Neutron Science and Technology Center, CROSS)
Joseph Don PARKER (Neutron Science and Technology Center, CROSS)
Yoshihiro MATSUMOTO (Neutron Science and Technology Center, CROSS)

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