27 August 2017 to 1 September 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Investigation on Thermal and Electrical Characteristics of MgB2 Magnet Using Partial-Insulation Winding Technique

28 Aug 2017, 13:15
1h 45m
Posters Area

Posters Area

Poster Presentation of 1h45m G2 - Quench and Normal-Zone Bahavior Mon-Af-Po1.10

Speaker

Mr Young-Gyun Kim (Department of Materials Science and Engineering, Korea University, Seoul, Korea)

Description

It is generally agreed that the development of a self-protective MgB2 magnet may not be achieved because of the slow normal-zone propagation velocity of the MgB2 wires, compared to their low-temperature superconductor counterparts. However, the use of the no-insulation (NI) winding technique can allow the MgB2 magnet to be self-protecting, because the excessive heat and current generated by local quenching can be automatically bypassed through the uninsulated turns. Nevertheless, to utilize the NI winding technique for large-scale superconducting magnets such as whole-body MRI magnets, it is essential to ameliorate the charging/discharging delays observed in the NI windings. As an alternative solution, this study examines a partially insulated (PI) MgB2 magnet that employs layer-to-layer insulations only, in the absence of turn-to-turn insulations. A monofilament MgB2 wire manufactured by Kiswire Advanced Technology Co. Ltd., was used for the fabrication of the PI MgB2 magnet. The charge-discharge and over-current characteristics of the PI MgB2 magnet were investigated to demonstrate the feasibility of employing the PI winding technique to develop a self-protective MgB2 MRI magnet with fast charging/discharging rates.
Acknowledgement: This work was supported by the Materials and Components Technology Development Program of KEIT [10053590, Development of MgB2 wire and coil with a high critical current and long length for superconducting medical•electric power equipment].

Submitters Country Republic of Korea

Primary authors

Mr Young-Gyun Kim (Department of Materials Science and Engineering, Korea University, Seoul, Korea) Prof. Haigun Lee (Department of Materials Science and Engineering, Korea University, Seoul, Korea)

Co-authors

Mr Jiman Kim (Department of Materials Science and Engineering, Korea University, Seoul, Korea) Mr Byeong-ha Yoo (Department of Materials Science and Engineering, Korea University, Seoul, Korea) Mr Subok Yun (Kiswire Advanced Technology Co., Ltd., Daejeon, Korea) Dr Duck Young Hwang (Kiswire Advanced Technology Co., Ltd., Daejeon, Korea) Mr Ji Hyung Kim (Department of Electrical Engineering, Jeju National University, Jeju, Korea) Prof. Ho Min Kim (Department of Electrical Engineering, Jeju National University, Jeju, Korea)

Presentation Materials