Realization of high-strength superconducting bulk magnets using split-type coil and the application to magnetic separation

利用分体式线圈实现高强度超导块体磁体及其在磁选中的应用

• 批准号: 23560002
• 负责人: FUJISHIRO Hiroyuki
• 金额: $ 3.49万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560002/
• 关键词: パルス着磁; 磁場中冷却着磁; REBCO超電導バルク; MgB2超電導バルク; 捕捉磁場; シミュレーション; 磁気分離; 超電導バルク; MgB2; 温度上昇; パルスコイル

The magnetic flux trap phenomena in various superconducting bulks (REBCO, MgB2) have been investigated using pulsed field magnetization (PFM) and field-cooled magnetization (FCM) by experiments and numerical simulation in order to enhance the trapped field, where various-type pulsed coils (solenoid-type, split-type) were used. Two-dimensional and three-dimensional analyses of electromagnetic and thermal fields were constructed using finite element method (FEM). The results of the simulation reproduce well the experimental ones.In the PFM experiments for the high-quality MgB2 bulks, flux jump took place frequently, which was a clear contrast with the conventional MgB2 bulk, which comes from the instability of the magnetic flux in the superconductor. The instability can be identified by the stability papameter beta and minimum propagation zone lm.

为了提高超导块材（REBCO，MgB2）的俘获场，采用脉冲场磁化（PFM）和场冷磁化（FCM）方法，通过实验和数值模拟研究了不同类型的脉冲线圈（螺线管型、分裂型）在不同超导块材（REBCO，MgB2）中的磁通俘获现象。采用有限元法对电磁场和温度场进行了二维和三维分析。在高质量MgB2超导体的PFM实验中，由于超导体内部磁通的不稳定性，导致磁通跳变现象频繁发生，这与传统的MgB2超导体形成了鲜明的对比。不稳定性可以通过稳定性参数β和最小传播区lm来识别。

项目成果

Direct Jc measurements and trapped field profiles using an identical superconducting bulk

• DOI: 10.1088/0953-2048/24/10/105003
• 发表时间: 2011-10
• 期刊: Superconductor Science and Technology
• 影响因子: 3.6
• 作者: H. Fujishiro;T. Naito;Daiki Furuta;T. Arayashiki;Y. Yanagi;Y. Itoh

成長領域境界(GSB)の配置が異なる四角形超電導バルクの着磁特性

不同生长区边界（GSB）位置的矩形超导块体的磁化特性

• 发表时间: 2011
• 作者: 荒屋敷貴大;小山 允;内藤智之;藤代博之;手嶋英一;森田 充
• 通讯作者: 森田 充

超電導バルクの磁場中冷却着磁のシミュレーション

磁场中冷却的超导块体的磁化模拟

• 发表时间: 2013
• 作者: M. Mino;K. Okano;T. Yamashita;藤代博之,内藤智之,手嶋英一
• 通讯作者: 藤代博之,内藤智之,手嶋英一

藤代研究室HP

藤城实验室HP

Trapped field and temperature rise in MgB_2 bulks magnetized by pulsed field

脉冲场磁化 MgB_2 块体中的俘获场和温升

• 发表时间: 2013
• 期刊: Proc. ICEC24-ICMC2012
• 作者: H. Fujishiro;T. Naito;T. Sasaki;T. Arayashiki
• 通讯作者: T. Arayashiki