软X射线断层扫描使用L1规范化用于JT-60SA中视线有限的MHD模式
T Bando1, M Takechi2, S Ohdachi3
1Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580, Japan.
The Review of scientific instruments
|December 3, 2024
概括
在核聚变研究中的软X射线断层扫描从L1规范化中受益,以减少受限视角造成的工件. 这种方法,结合富里埃-贝塞尔数列或拉普拉斯的特征函数,可以在tokamaks中改进空间结构分析.
科学领域:
- 等离子体物理学的物理学
- 融合能源研究 融合能源研究
- 断层扫描 (Tomography) 是一个专业的技术.
背景情况:
- 软X射线 (SX) 断层扫描对于诊断融合等离子体至关重要.
- 大型托卡马克JT-60SA将为其SX诊断器具有有限的视线,这在未来的设备中很常见.
- 有限的视线在SX断层扫描中引入了文物,阻碍了磁动力学 (MHD) 模式分析.
研究的目的:
- 调查L1规范化,以减少视线有限的SX断层扫描中的文物.
- 评估用于分析延长型托卡马克等离子体中MHD模式的替代基础函数.
主要方法:
- 应用L1规范化与传统L2规范化一起用于SX断层扫描.
- 利用里埃-贝塞尔数列 (FBS) 并引入赛托的拉普拉斯特有函数 (LEF) 作为基础函数.
- 在JT-60SA易受MHD模式的影响中模拟了一个高beta场景.
主要成果:
- 与单独的L2调节相比,L1调节显著减少了SX断层扫描中的工件.
- 赛托的LEF比FBS具有优势,因为它不需要内部等离子体测量.
- 两种FBS和LEF,当与L1规范化相结合时,改善了等离子体空间结构的重建.
结论:
- L1调节有效地减轻了视线有限的SX断层扫描中的文物.
- 赛托的LEF是一个可行且实用的基础函数,用于分析tokamaks中的MHD模式.
- 开发的方法有望改进当前和未来的核聚变装置中的断层分析.
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