外部電流系を変量とした最適化によるヘリカル閉じ込め方式の新領域開拓と課題解決

外流系统为变量优化螺旋约束法新领域探索与问题求解

• 批准号: 21K13904
• 负责人: 山口 裕之
• 金额: $ 3万
• 依托单位: National Institute for Fusion Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K13904/
• 关键词: 核融合; 最適化; 遺伝的アルゴリズム; ダイバータ配位; 準軸対称配位; 準対称配位; 新古典輸送; 高エネルギー粒子; ダイバータ

本年度は，本計画で開発している閉じ込め配位最適化コードOPTHECSのプラズマシミュレータへの移植をまず完了させた．前年度まで問題となっていたMPI並列コードからの要素コード呼び出しについて，CPU割当の工夫によって適切に実行可能であることが明らかとなったため，予定していた新しいアルゴリズムへの転換は行わないこととした．LHD型の連続ヘリカルコイルに基づく磁場配位について，ブランケット設置スペースの拡張とプラズマ閉じ込め改善の２つの方向性で最適化を進めた．真空磁場に対して磁力線が統計的に振る舞うエルゴディック層の厚みを評価するルーチンを開発した．これをOPTHECSに組み込み，プラズマとコイル中心との距離を増大させる最適化をB-spline自由曲線コイルに対して施すことで，ブランケット設置スペースを10%程度の増大させた配位の構築に成功した．上記の成果を，昨年度の成果と合わせて，国際ステラレータ・ヘリオトロンワークショップにおいて招待講演として発表した．LHD型コイル配位のもう１つの方向性の最適化として，有限ベータ効果を考慮した自由境界平衡に基づき，新古典輸送の低減とMHD安定性の改善を図る最適化を進めた．MHD安定性の指標には回転変換がm/n=1となる有理面における規格化されたMercier indexを用いた．結果として，中心ベータ3-5%においてMHD安定性を同程度に保ちつつ，新古典輸送を改善した配位が得られることがわかった．STELLOPTとのベンチマークについて，比較用のテストケースとして，OPTHECSにより，プラズマ体積全域にわたる磁気井戸を有する周期数２，アスペクト比4.15の新しい準軸対称磁場配位を構築した．この配位はCFQSに比べて極めて高い軸対称性を示すことがわかった．

This year, this project starts the most efficient coordination system for OPTHECS. This year, the problem of the previous year has been completed. The previous year, the key elements of the MPI have been listed in the current year, and the key elements have been called out. When the CPU is in operation, you may need to know that you are not aware of the situation. It is assumed that there is a new link in the field of magnetic field coordination of the LHD type. This is the best way to improve the directionality of the vacuum magnetic field. the vacuum magnetic field is used to improve the directionality of the vacuum magnetic field. the vacuum magnetic field is used to improve the directionality of the vacuum magnetic field. the performance of the vacuum magnetic field is much higher than that of the vacuum magnetic field. the performance of the vacuum magnetic field is much higher than that of the vacuum magnetic field. the temperature of the vacuum magnetic field is much higher than that of the vacuum magnetic field, and the magnetic force statistics of the vacuum magnetic field are very different from those of the vacuum magnetic field. the performance of the vacuum magnetic field is much higher than that of the vacuum magnetic field. the temperature of the vacuum magnetic field is very high, and the performance of the vacuum magnetic field is very high. The performance of the vacuum magnetic field is much higher than that of the vacuum magnetic field. The temperature of the vacuum magnetic field is much higher than that of the vacuum magnetic field. The temperature of the vacuum magnetic field is much higher than that of the vacuum magnetic field. The performance of the vacuum magnetic field is very The center of the system is far away from the center of the system. The B-spline free curve is optimized. The configuration of the device is 10%. The results of the previous year are in line with the results of the previous year. In the international community, there is a question of hospitality. LHD coordination, coordination, direction, maximization, limited results, balance of freedom, basic knowledge, etc. Neo-classical low-temperature MHD stability improvement. MHD stability improvement. MHD stability refers to the reduction of temperature, m/n=1, rational surface standardization, Mercier index standardization, MHD stability, MHD stability and MHD stability. There are two cycles in the neo-classical system, such as the improvement of coordination, the improvement of coordination and the improvement of coordination. The new standard for magnetic field coordination is called magnetic field coordination, which is much higher than that of 4.15. The magnetic field coordination CFQS is much higher than that of the magnetic field.

项目成果

Optimization of modular and helical coils applying genetic algorithm and fully-three-dimensional B-spline curves

应用遗传算法和全三维 B 样条曲线优化模块化螺旋线圈

• DOI: 10.1088/1741-4326/ac1ae2
• 发表时间: 2021
• 期刊: Nuclear Fusion
• 影响因子: 3.3
• 作者: Yamaguchi Hiroyuki;Satake Shinsuke;Nakata Motoki;Shimizu Akihiro;Suzuki Yasuhiro;W7-X Team the
• 通讯作者: W7-X Team the

外部コイル形状を変量とする磁場配位最適化コードの開発

使用外部线圈形状作为变量开发磁场配置优化代码

• 发表时间: 2021
• 作者: Yamaguchi Hiroyuki;Satake Shinsuke;Nakata Motoki;Shimizu Akihiro;Suzuki Yasuhiro;W7-X Team the;Hiroyuki Yamaguchi;Yamaguchi Hiroyuki;山口裕之
• 通讯作者: 山口裕之

Development of coil-shaping-based optimization code and its application to helical coil stellarator

基于线圈整形的优化代码开发及其在螺旋线圈仿星器中的应用

• 发表时间: 2022
• 作者: Yamaguchi Hiroyuki;Satake Shinsuke;Nakata Motoki;Shimizu Akihiro;Suzuki Yasuhiro;W7-X Team the;Hiroyuki Yamaguchi
• 通讯作者: Hiroyuki Yamaguchi

Optimization of helical configuration using the OPTHECS code

使用 OPTHECS 代码优化螺旋配置

• 发表时间: 2021
• 作者: Yamaguchi Hiroyuki;Satake Shinsuke;Nakata Motoki;Shimizu Akihiro;Suzuki Yasuhiro;W7-X Team the;Hiroyuki Yamaguchi;Yamaguchi Hiroyuki
• 通讯作者: Yamaguchi Hiroyuki