RIKEN Accelerator-driven compact neutron systems, RANS project, and their capabilities

Speaker

Yoshie Otake

Affiliation

RIKEN

When
Place

DIPC Seminar Room

Host

Félix Fernández Alonso

At RIKEN we have developed compact neutron source systems for on-site quantitative evaluation for practical use. The first of these systems, RANS (RIKEN Accelerator-driven compact Neutron Systems), has been in operation since 2013 and is used by many people in academia, industry, and infrastructure in Japan and abroad. [1]. There are two major goals of our RANS Project’s research and development. One is to establish and realize CANS (Compact Accelerator-driven Neutron Source) models that can be easily operated, non-destructively measured, and quantitatively evaluated, as a floor-standing type for industrial use as non-destructive analysis equipment. Another goal is to invent a novel transportable compact neutron system for the preventive maintenance of large- scale construction such as bridges and highways. Two accelerator-based compact neutron source systems, RANS (7 MeV proton, Be target) and RANS-II (2.49 MeV proton, Li target), as well as RANS-μ (252Cf) which have started real bridge measurements, are in constant operation. In addition, RANS-III, a transportable compact neutron system for non-destructive inspection of bridge decks, and cable-stayed bridge anchorage deterioration detection, is being developed for onboard use. There are more than six kinds of instruments, and neutron measurements are available with RANS and RANS-II. The transmission imaging, neutron diffractometer towards stress measurement [2], small angle scattering instruments with thermal and cold moderators at RANS, fast neutron scattering time-of-flight imaging [3], neutron activation analysis with RANS and RANS-II, and neutron-induced prompt gamma-ray analysis with RANS, RANS-II, and RANS-μ are available.

References
[1] Y.Otake, "A Compact Proton Linac Neutron Source at RIKEN", “Applications of Laser-Driven Particle Acceleration” eds. Paul Bolton, et al. (2018) Chapter 19 pp.291-314 CRC Press
[2]C. Iwamoto , et al., , ISIJ Int. 62, No. 5, pp. 1013–1022, (2022).
[3] Y. Ikeda, et al. Plasma and Fusion Research Vol.13(2018) pp.2406005-1-5