Direct production of Nb3Al superconducting coil by electron beam irradiation on a cold-sprayed cylinder |
| |
| Authors: | Tsutomu Ando Akihisa Miyazoe Noriyuki Hirota Hitoshi Wada Susumu Tsukamoto Tsukasa Kiyoshi |
| |
| Affiliation: | a Dept. of Chemical System Engineering, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku 113-8656, Japanb Dept. of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwanoha, Kashiwa 277-8561, Japanc Nano Ceramics Center, National Institute for Materials Science, Sengen, Tsukuba 305-0047, Japand Structural Metals Center, National Institute for Materials Science, Sengen, Tsukuba 305-0047, Japane Superconductivity Research Section, Electronics Research Laboratory, Kobe Steel Co. Ltd., Kobe 651-2271, Japanf Superconducting Materials Center, National Institute for Materials Science, Sakura, Tsukuba 305-0003, Japan |
| |
| Abstract: | The direct production of Nb3Al superconducting coils using the combinational technology of ‘cold spray’ as physical deposition and ‘electron beam’ as surface modification has been proposed. Using this method, the helical line of the Nb3Al superconductor is produced directly on a cylinder without conventional wiring process. In order to prove the possibility of direct coil production, we first made flat-plate and cylindrical samples, and then examined the characteristics as superconductor. The flat-plate samples showed the phase transition in magnetization and the characteristics of superconductivity when the output powers of the electron beam were over 800 W at a beam speed of 3 m/s and 1200 W for 6 m/s. It was confirmed that a 10-turn single-layer coil with a ?40 mm diameter and a length of 50 mm generated a magnetic field of 2.7 mT at 20.5 A. |
| |
| Keywords: | Cold spray Electron beam Nb3Al superconductor πD method |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
