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Related Experiment Video

Updated: Jun 8, 2025

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor

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Published on: May 7, 2021

Redifining RADEN's high-resolution neutron imaging capabilities.

Oriol Sans-Planell¹, Takenao Shinohara², Francesco Grazzi^3,4

¹Helmholtz-Zentrum Berlin für Materialen und Energie, Hahn-Meitner Platz 1, 14109 Berlin, Germany.

The Review of Scientific Instruments

|November 8, 2024

Summary

Researchers reevaluated the collimation power of the RADEN neutron imaging system, finding significantly higher L/D factors than previously estimated. This study highlights RADEN

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Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

Published on: December 8, 2016

Area of Science:

Nuclear Physics
Materials Science
Imaging Technology

Background:

The Japan Proton Accelerator Research Complex (J-PARC) houses the Energy-Resolved Neutron Imaging System (RADEN).
Accurate characterization of beam collimation is crucial for neutron imaging applications.
Previous estimations of RADEN's collimation power (L/D factor) required reevaluation.

Purpose of the Study:

To systematically reevaluate and accurately determine the collimation power of the RADEN beamline.
To compare the performance of different scintillator materials and thicknesses for neutron imaging.
To investigate discrepancies between geometrically calculated and experimentally measured L/D factors.

Main Methods:

Employed a state-of-the-art method for calculating the L/D factor.
Utilized a standard reference sample for measuring neutron image resolution.
Compared five different scintillators: 6LiF:ZnS(Ag) (50, 100, 200, 300 μm) and Gd2O2S (50 μm).

Main Results:

The collimating power of the RADEN beam was determined to be significantly higher than previously assumed, ranging from 470 to 1520.
Demonstrated superior performance of the RADEN beamline.
Identified a discrepancy between geometrically calculated and experimentally measured L/D values.

Conclusions:

The actual measurable collimation power of the RADEN beamline is substantially greater than prior estimates.
The study underscores the importance of experimental validation for beamline characterization.
Highlights the advanced capabilities of the RADEN facility for neutron imaging research.