Development of UHV transfer case for sample transport using NEG coating

Morohashi, Yuko ; Kamiya, Junichiro   ; Warigai, Keiichi*; Takeishi, Kenichi; Kobata, Masaaki ; Yoshigoe, Akitaka ; Tsuda, Yasutaka   ; Fukuda, Tatsuo  ; Yamada, Ippei ; Chiba, Daisuke

A new Non-Evaporable Getter (NEG) coating has been developed for J-PARC's advanced vacuum systems, addressing performance degradation due to repeated atmospheric exposure. The new technique removes oxide films from the interior of titanium vacuum chambers before applying the NEG coating, using titanium's getter function to maintain lower pressures even after repeated exposure. A lightweight, compact prototype transfer case was designed to transport nanomaterial samples between analyzers while maintaining ultra-high vacuum (UHV) conditions. Tests between J-PARC and SPring-8 confirmed successful transport of NEG-coated (Ti, Zr, V) surfaces and silicon wafers without oxidation. Future improvements will focus on enhancing the design for commercial use and applying it to J-PARC's future accelerator vacuum systems.