Study for optimal strain state for high temperature superconducting composite by using synchrotron radiation strain measurement at cryogenic temperature

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360281
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Composite materials/Physical properties
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: SUGANO Michinaka 大学共同利用機関法人高エネルギー加速器研究機構, 超伝導低温工学センター, 研究機関講師 (30402960)
• Co-Investigator(Kenkyū-buntansha): MACHIYA Shutaro 大同大学, 工学部機械工学科, 准教授 (40377841) ; SHOBU Takahisa 日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, 主任研究員 (90425562)
• Co-Investigator(Renkei-kenkyūsha): OGITSU Toru 高エネルギー加速器研究機構, 超伝導低温工学センター, 教授 (30185524)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 高温超伝導体 / 放射光ひずみ測定 / 臨界電流 / ひずみ効果 / 低温引張試験

Outline of Final Research Achievements

To reveal the optimal strain state for high temperature superconducting composite, we developed cryogenic tensile testing system for synchrotron radiation experiment. Compact tensile testing apparatus is needed to mount on a goniometer in a synchrotron beam line. In this study, we adopted new cooling scheme in which tensile testing machine and GM cryo-cooler are installed in different cryostats and both of them are thermally connected with flexible link made of high purity aluminum. As a result of cooling test, the minimum temperature at a sample was confirmed t be 25 K. By using this system, we carried out a strain measurement with synchrotron diffraction technique in SPring-8. We succeeded to measure the residual strain and internal strain under axial applied tensile strain at temperatures between 30 K and room temperature.

Free Research Field

超伝導応用