Neutron Beam Technology Team

Team Leader

Yoshié Otake



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Neutron Beam Technology Team,
RIKEN Center for Advanced Photonics

Neutron Application Facilities,
2-1 Hirosawa, Wako, Saitama 351-0198 Japan


The project of RIKEN accelerator-driven compact neutron system (RANS) has two main development goals: the first is the realization of an evaluation and analysis system for use in the field of manufacturing, and the second is the development of non-destructive inspection techniques and equipment for preventive maintenance at infrastructure sites. RANS-II with a total length of 5 m, which can be introduced into the onsite of manufacturing field, has been successfully developed. Neutron salt meter, RANS-μ for outdoor use was successfully used to measure bridge salt density on national highways, and inspection support performance catalogue of MILT. The transportable RANS-III will finally be installed inside a tractor.


Physics, Engineering, Interdisciplinary science and engineering


Accelerator-based compact neutron system, Characterization of microstructure and texture evaluation in steels, Research and development of non-destructive inspection for infrastructures, Visualization of water and air hole in concrete slabs, Detection of salt damage in the concrete by prompt-gamma neutron activation analysis


  1. Research and development of compact neutron system for practical use at anytime, anywhere
  2. Ultra compact neutron salt-meter, RANS-μ, against salt-damage
  3. Realization of the on-site use compact neutron system
  4. Non- destructive test technology with quantitative analysis
  5. R&D for the water exploration and elemental analysis on the Moon and Mars

The future imaging of compact neutron non-destructive test system on-site

Selected Publications

  1. Teshigawara, M., Ikeda, Y., Yan, M., Muramatsu, K., Sutani, K., Fukuzumi, M., Noda, Y., Koizumi, S., Saruta, K., and Otake, Y.: “New Material Exploration to Enhance Neutron Intensity below Cold Neutrons: Nanosized Graphene Flower Aggregation” , Nanomaterials 2023, 13(1), 167486 (2022).
  2. Watanabe, A., Sekiguchi, K., Ino, T., Inoue, M., Nakai, S., Otake, Y., Taketani, A., and Wakabayashi, Y.: “Absolute 3 He polarimetry for a double-chambered cell using transmission of thermal neutrons” , Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.Vol. 1043, (2022).
  3. Ikeda, S., Kobayashi, T., Otake, Y., Matsui, R., Okamura, M., and Hayashizaki, N.: “Fabrication and RF test of the 500 MHz-RFQ linear accelerator for a transportable neutron source RANS-III” J. Neutron Res. vol. 24, no. 3-4, pp. 249-259 (2022).
  4. 大竹淑恵,水田真紀.: “中性子技術を用いたコンクリートの評価技術の最前線③小型中性子源の開発と 維持管理への活用最前線,” , コンクリート工学. vol. 60,No.4,pp.406-411 (2022).
  5. Wakabayashi, Y., Yan, M., Takamura, M., Ooishi, R., Watase, H., Ikeda, Y., and Otake,Y.: “I Development of neutron salt-meter RANS-μ for non-destructive inspection of concrete structure at on-site use” , J. Neutron Res. 24, no. 3-4, pp. 411-419 (2022).


Yoshie OtakeTeam Leader
Tomohiro KobayashiSenior Research Scientist
Maki MizutaResearch Scientist
Takaoki TakanashiResearch Scientist
Chihiro IwamotoResearch Scientist
Yasuki OkunoResearch Scientist
Shota IkedaPostdoctoral Researcher