The energy-resolved neutron imaging system, RADEN

Abstract

The energy-resolved neutron imaging system, RADEN, has been installed at the pulsed neutron source in the Materials and Life Science Experimental Facility of the Japan Proton Accelerator Research Complex. In addition to conventional neutron radiography and tomography, RADEN, the world’s first imaging beam-line at a pulsed neutron source, provides three main options for new, quantitative neutron imaging techniques: Bragg-edge imaging to visualize the spatial distribution of crystallographic information, resonance absorption imaging for elemental composition and temperature information, and polarized neutron imaging for magnetic field information. This paper describes the results of characterization studies of the neutronic performance and installed devices at RADEN and shows the results of several demonstration studies for pulsed neutron imaging.

Improvement of Bragg-edge Neutron Transmission Imaging for Evaluating the Crystalline Phase Volume Fraction in Steel Composed of Ferrite and Austenite

“…The energy-resolved neutron imaging system, RADEN, was constructed at BL22 of MLF in J-PARC. 19,20) The pulsed neutron source is based on a spallation reaction using the 3 GeV proton synchrotron in J-PARC. The proton beam power for our experiment was 200 kW.…”

“…The FWHM of the cold neutron pulse was approximately 50 μs. 19,20) The neutron beam angular divergence and the neutron flux were determined by a pinhole collimator with 15 mm diameter placed at the 8.0 m beamline position. The neutron TOFimaging detector was a GEM detector.…”

Root phenotyping: important and minimum information required for root modeling in crop plants

“…A current trend in root phenotyping is precise and nondestructive 3D imaging techniques such as magnetic resonance imaging (MRI) and X-ray computed tomography (Xray CT). White neutron beam radiography and tomography are also used in root imaging (Shinohara et al 2020, Tötzke et al 2017. As water decays the neutron beam, these systems readily detect water and roots.…”

“…As water decays the neutron beam, these systems readily detect water and roots. Both plant RSA (Shinohara et al 2020, Tötzke et al 2017) and rhizosphere water content can be clearly visualized by neutron tomography (Tötzke et al 2017). However, neutron beam irradiation may damage plant tissues.…”

Observation of Eu Adsorption Band in the CMPO/SiO2–P Column by Neutron Resonance Absorption Imaging

“…Pulsed neutron transmission experiments were performed at BL22 [14] in the Materials and Life Science experimental facility. Neutrons were generated by a proton beam with power of 500 kW.…”