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Kurono, Taihei*; Takami, Seiichi*; Kubo, Masaki*; Kurita, Keisuke; Iikura, Hiroshi; Harayama, Isao
Journal of Supercritical Fluids, 235, p.106978_1 - 106978_9, 2026/09
Times Cited Count：0 Percentile：0.00(Chemistry, Physical)Ino, Keita*; Umekawa, Hisashi*; Ami, Takeyuki*; Harayama, Isao; Kurita, Keisuke; Iikura, Hiroshi
Konsoryu, 40(2), p.150 - 158, 2026/06
Kurita, Keisuke; Iikura, Hiroshi; Harayama, Isao; Tsuchikawa, Yusuke; Morooka, Satoshi; Kai, Tetsuya; Shinohara, Takenao; Odaira, Naoya*; Ito, Daisuke*; Saito, Yasushi*; et al.
Proceedings of 12th World Conference on Neutron Radiography; Springer Proceedings in Physics, Vol.348, p.244 - 251, 2026/06
At the resumption of JRR-3 operations in 2021 after a 10-year shutdown, only an imaging system using imaging plates (IPs) was available at the CNRF. Although high-resolution images could be acquired, the system was unsuitable for continuous imaging required for computed tomography (CT) scans and dynamic imaging. It was also difficult to perform quantitative analysis from the images. To resolve these problems, we have introduced a new imaging system with a dark box, a scintillator, and a CMOS camera (Hamamatsu Photonics, ORCA Flash 4.0 V3). In this presentation, the performance of the imaging system, usage examples of the CNRF, and its results will be presented.
Fumoto, Koji*; Okubo, Kento*; Oshima, Shotaro*; Hatamoto, Asami*; Kurita, Keisuke; Harayama, Isao; Iikura, Hiroshi
Journal of Visualization, 29(1), p.1 - 12, 2026/02
Times Cited Count：0 Percentile：0.00(Computer Science, Interdisciplinary Applications)Ozawa, Takahiro*; Harayama, Isao; Fukutani, Katsuyuki; 3 of others*
Science Advances (Internet), 11(47), p.eady8495_1 - eady8495_7, 2025/11
Times Cited Count：3 Percentile：19.02(Multidisciplinary Sciences)
- telescope ERDAHarayama, Isao; Hirose, Yasushi*; Sekiba, Daiichiro*
Nuclear Instruments and Methods in Physics Research B, 554, p.165435_1 - 165435_6, 2024/09
Times Cited Count：0 Percentile：0.00(Instruments & Instrumentation)- telescope elastic recoil detection analysis (ERDA) is a helpful ion beam analysis (IBA) technique for the absolute quantification of multiple light elements in thin films. We have developed a compact - telescope ERDA system to estimate a composition ratio of oxygen and nitrogen in metal oxynitride thin films. Our - telescope ERDA system employs a gas ionization chamber (GIC), which consisted of a U-shaped cathode, while a planar shaped cathode is widely utilized for GICs. The shape of U-shaped cathode is useful to downsize the GIC. The difference of performance between the U-shaped and planar shaped cathodes, however, has not been studied well, yet. In this study, we quantitatively evaluated the influence using the U-shaped cathode on - telescope ERDA. In order to compare the performance of the U-shaped and planar shaped cathode, we measured SrTiO
bulk samples as a standard with them. There is no significant difference between the two cathodes from the viewpoint of O recoil yields. These results show that the U-shaped cathode can also be used safely for - telescope ERDA, and that GICs have a flexibility in the electrode shape, which is useful to make GICs more compact.
Tsuchikawa, Yusuke; Kurita, Keisuke; Hasemi, Hiroyuki; Harayama, Isao; Takahashi, Shingo*
no journal, ,
no abstracts in English
Matsumoto, Ryosuke*; Fujikawa, Naoto*; Oda, Yutaka*; Kurita, Keisuke; Iikura, Hiroshi; Harayama, Isao
no journal, ,
Ito, Daisuke*; Odaira, Naoya*; Saito, Yasushi*; Harayama, Isao; Kurita, Keisuke; Shinohara, Takenao; Osawa, Takahito; Kiyanagi, Yoshiaki*
no journal, ,
Kurita, Keisuke; Harayama, Isao; Iikura, Hiroshi; Tsuchikawa, Yusuke; Kai, Tetsuya; Shinohara, Takenao
no journal, ,
no abstracts in English
Matsumoto, Ryosuke*; Fujikawa, Naoto*; Oda, Yutaka*; Kurita, Keisuke; Iikura, Hiroshi; Harayama, Isao
no journal, ,
no abstracts in English
Ezaka, Hiroki*; Yabutsuka, Takeshi*; Takai, Shigeomi*; Iikura, Hiroshi; Kurita, Keisuke; Harayama, Isao
no journal, ,
no abstracts in English
Harayama, Isao; Kurita, Keisuke; Nagahori, Kazuhisa; Shobu, Takahisa; Takano, Yoshiki*; Nishiwaki, Hikaru*; Choe, H.*; Mukai, Tomohisa*
no journal, ,
no abstracts in English
Miyata, Noboru*; Sando, Mizuki*; Mita, Kazuki*; Nakanishi, Yohei*; Miyazaki, Tsukasa*; Takenaka, Mikihito*; Kurita, Keisuke; Harayama, Isao; Iikura, Hiroshi
no journal, ,
no abstracts in English
Harayama, Isao; Kurita, Keisuke; Iikura, Hiroshi; Tsuchikawa, Yusuke; Kai, Tetsuya; Shinohara, Takenao; Matsubayashi, Masahito; Odaira, Naoya*; Ito, Daisuke*; Saito, Yasushi*
no journal, ,
no abstracts in English
Harayama, Isao
no journal, ,
no abstracts in English
Kurita, Keisuke; Iikura, Hiroshi; Harayama, Isao; Tsuchikawa, Yusuke; Kai, Tetsuya; Shinohara, Takenao; Odaira, Naoya*; Ito, Daisuke*; Saito, Yasushi*; Matsubayashi, Masahito
no journal, ,
Two large neutron experimental facilities are located at the Nuclear Science Research institute site. One is the Japan Proton Accelerator Research Complex (J-PARC). The other is the Japan Research Reactor-3 (JRR-3). Each of them has neutron imaging facilities. In this presentation, we will introduce the performances, updated devices, utilization results and imaging examples of neutron radiography facilities at the JRR-3.
Sakai, Kazumi*; Utsumi, Takeru*; Matsumoto, Yoshihiro*; Harayama, Isao; Kurita, Keisuke
no journal, ,
Shobu, Takahisa; Mukai, Tomohisa*; Choe, H.*; Takano, Yoshiki*; Sakashita, Masanobu*; Nakamura, Akihiro*; Morooka, Satoshi; Kurita, Keisuke; Harayama, Isao; Iikura, Hiroshi
no journal, ,
Post-installed anchors are a common technology used in seismic retrofitting work, and it is expected that their range of application will expand to include renovation work such as expansions and reconstructions. In this study, neutrons, which have an extremely high penetrating power for materials, were used to evaluate the long-term adhesion characteristics of post-installed anchors from the results of measuring the strain distribution of rebar under load, etc.
Harayama, Isao; Kurita, Keisuke; Iikura, Hiroshi; Tsuchikawa, Yusuke; Kai, Tetsuya; Shinohara, Takenao; Matsubayashi, Masahito; Odaira, Naoya*; Ito, Daisuke*; Saito, Yasushi*
no journal, ,
no abstracts in English
Fumoto, Koji*; Okubo, Kento*; Oshima, Shotaro*; Hatamoto, Asami*; Kurita, Keisuke; Harayama, Isao; Iikura, Hiroshi
no journal, ,
The self-heating of electric devices and machinery is a significant challenge. Therefore, an ultralow-fill-rate heat pipe (ULFR-HP) was developed as an innovative cooling solution. Constructed from an aluminum alloy and using water as the working fluid, the ULFR-HP features a meandering flow path. Upon heating, the working fluid circulates through this path, effectively transferring heat away from the source. Although previous studies have demonstrated the ULFR-HP's superior heat transfer coefficient compared to conventional cooling methods (e.g., PHP), the underlying mechanisms of fluid flow and heat transport remain unclear. To elucidate these processes, we conducted a neutron radiography experiment using the ULFR-HP.
