Thermometer attachment methods on a helium pipe for JT-60SA

Natsume, Kyohei; Murakami, Haruyuki; Yanagi, Shunki; Kizu, Kaname; Yoshida, Kiyoshi

Valve Boxes (VBs) and Coil Terminal Boxes (CTBs) will be fabricated as magnet shared components and be installed on the cryostat of JT-60SA. VB is for distributing cryogens to superconducting magnets, cryopumps, and thermal shields. CTB includes the interface between high temperature superconducting current leads and power supply bus bars. In this presentation, attachment methods of thermal sensors on the cryogen pipes in vacuum VB or CTB are described. An Experiment to measure the helium in the pipe has been conducted using the two different attachment methods. The experimental results are compared and estimated by considering measurement accuracy and productivity.