Expansion of the JRR-3 user application system; RING (Research Information NaviGator)

Abe, Kazuhide

JAEA-Review 2024-065, 26 Pages, 2025/03

JAEA-Review-2024-065.pdf:2.55MB

The Japan Atomic Energy Agency's research reactor, JRR-3, resumed operations on February 26, 2021, after nearly a decade. As a shared-use facility, JRR-3 is operated to accommodate external users as well. The procedures, from research proposal submissions to final report submissions, are conducted through the online system JRR-3 RING (Research Information NaviGator) (https://jrr3ring.jaea.go.jp/). RING enables integrated management of proposal submissions, schedule adjustments, data sharing, and report submissions, and it has been upgraded in preparation for the resumption of JRR-3 operations. RING is specifically designed to enhance the convenience of beamline users, featuring simplified application processes, improved flexibility in schedule coordination, and enhanced data management capabilities. With the implementation of this system, users can conduct their research more efficiently and securely. Moving forward, JRR-3 aims to expand its role as a platform for neutron research, accessible to a diverse range of researchers both domestically and internationally. The resumption of operations and the expansion of RING mark a significant step toward revitalizing neutron research and fostering collaboration with industries and academia.

Restart of user program of JRR-3 and activities of JRR-3 Users Office

Tamura, Itaru; Kodama, Katsuaki; Igawa, Naoki; Abe, Kazuhide; Matsue, Hideaki

no journal, , 

no abstracts in English

Study of gas adsorption on the surface of NEG materials by HAXPES

Kobata, Masaaki; Morohashi, Yuko; Abe, Kazuhide; Yamada, Ippei; Fukuda, Tatsuo; Koarai, Kazuma; Tanida, Hajime; Kamiya, Junichiro

no journal, , 

This study aimed to improve non-evaporable getter (NEG) coating technology on titanium substrates, focusing on lowering activation temperatures and enhancing repeatability. Using Hard X-ray Photoelectron Spectroscopy (HAXPES) and Secondary Ion Mass Spectrometry (SIMS), we analyzed NEG activation and degradation mechanisms. The effects of titanium, stainless steel (SUS316), and beryllium copper (BeCu) substrates on NEG properties were compared. Results suggested that the BeCu substrate had the lowest activation temperature, indicating its potential advantage for low-temperature NEG activation.

Analysis of activation and deterioration mechanism of Ti-Zr-V NEG coating by XPS

Kamiya, Junichiro; Abe, Kazuhide; Kobata, Masaaki; Tsuda, Yasutaka; Fukuda, Tatsuo; Fujimori, Shinichi; Morohashi, Yuko; Yamada, Ippei; Yoshigoe, Akitaka

no journal, , 

Sequence measurements with XPS have been performed to understand more detail about the activation and deterioration mechanism. The sample of a titanium plate with Ti-Zr-V coating of 1 um thickness was prepared. The sample was set in the surface science station in the BL23SU of SPring-8. At first, the XPS measurements for the sample surface were performed during the sample temperature was raised to 250C. After that, the XPS was subsequently performed during the injection of oxygen gas into the chamber while keeping the sample temperature at 250C, which corresponds to the accelerated deterioration test. After that, the depth profile of the sample was measured with another XPS apparatus with an X-ray tube by argon etching. The result showed that the surface Zr gets the oxygen from Ti oxide and V oxide at the first stage of the activation and the oxygen of the Zr oxide would diffuse to the bulk in the continuous temperature rise. It was revealed that the concentrated oxygen in the coating exists in the forms of mainly Zr oxide and Ti oxide in the second place.

BeCu material vacuum chamber with NEG coating

Wada, Kaoru*; Shiga, Takashi; Okahashi, Kazunari*; Kamiya, Junichiro; Kobata, Masaaki; Morohashi, Yuko; Abe, Kazuhide; Kishikawa, Shinsuke*; Sasaki, Masanao*; Kuroiwa, Masahide*; et al.

no journal, , 

Tokyo Electronics Co., Ltd. manufactures and sells ultra-high vacuum equipment using BeCu material. By integrating this with the NEG coating technology from the Japan Atomic Energy Agency, the company has developed a getter-type BeCu vacuum chamber that can operate without electricity. In a series of experiments, the chamber was opened to the atmosphere, evacuated, and then subjected to a baking (activation) process at 200 for 8.5 hours, repeated five times. The results showed that the NEG coating significantly improved the pumping speed and reduced the ultimate pressure. Additionally, during buildup pressure measurements, this process was repeated five times. While there was no substantial difference in pressure before the tests, a noticeable improvement in pressure was observed with the NEG coating as the tests progressed. This demonstrates that the NEG coating not only enhances the efficiency of the vacuum system but also plays a crucial role in maintaining an ultra-high vacuum environment.