Design study on superconducting coil system of cyclotron for nuclear waste disposal

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630116
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Waseda University
• Principal Investigator: Ishiyama Atsushi 早稲田大学, 理工学術院, 教授 (00130865)
• Co-Investigator(Kenkyū-buntansha): NOGUCHI So 北海道大学, 情報科学研究科, 准教授 (30314735) ; UEDA Hiroshi 岡山大学, 自然科学研究科, 准教授 (10367039)
• Co-Investigator(Renkei-kenkyūsha): YAMAKAWA Hiroshi 早稲田大学, 理工学術院, 教授 (00097263)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 加速器 / 超伝導材料 / 電気機器 / 核廃棄物処理 / 量子ビーム

Outline of Final Research Achievements

We have been developing superconducting REBCO coil systems for a cyclotron with a output power of 30MW for nuclear waste disposal. At first, we carried out conceptual design of the REBCO coil system for a 30MW cyclotron. The REBCO coils require a high mechanical strength in order to overcome the huge hoop stress. In our previous study, we have proposed a coil structure named “YOROI-coil structure”. The YOROI-coil structure consists of the upper and lower plates and the outer frame of the winding. The outer frame is connected to the upper and lower plates, and transfers a part of electromagnetic force from the coil winding to the reinforcing outer plates. However, to realize HTS magnets with higher magnetic field and higher current density, development of advanced YOROI-coil structure is expected. In this study, we investigated effect of stress control structure to realize HTS coil with a mechanical strength over 2GPa by the three-dimensional finite element structural analyses.

Free Research Field

超伝導工学