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在MAST升级中重建软X射线发射

B A Steward¹, M Cecconello¹, C Bowman²

¹Durham University, Department of Physics, Durham DH1 3LE, United Kingdom.

The Review of scientific instruments

|December 11, 2024

概括

精确测量聚变反应堆中的磁性不稳定性至关重要. 通过交叉视线增强的软X射线断层扫描显著改善了这些不稳定的重建,有助于融合性能.

科学领域:

等离子体物理学的物理学
核聚变能源研究研究
磁动力学是一种磁动力学.

背景情况:

快速离子封闭对于聚变反应堆运行至关重要,影响等离子体加热和电流驱动.
快速离子和磁动力学 (MHD) 不稳定性之间的相互作用降低了聚变性能.
需要对MHD不稳定性的精确空间测量来限制数值模型.

研究的目的:

调查软X射线 (SXR) 断层扫描在重建MHD不稳定性的有效性.
用合成SXR排放来评估不同的断层图形重建模型.
评估额外的交叉视线对重建准确性的影响.

主要方法:

在Mega Ampere Spherical Tokamak Upgrade (MAST-U) 设备上使用TRANSP/NUBEAM模拟产生的合成SXR发射.
采用了SXR断层扫描技术,该技术从线路集成测量中重建2D SXR发射率配置文件.
对比了各种断层图形重建模型,并分析了添加交叉的SXR视线的影响.

主要成果:

SXR断层扫描成功重建了SXR发射率的2D配置文件,揭示了不稳定的空间结构.
在交叉的SXR视线上增加了两个额外的风扇,大大提高了断层图像重建的准确性.
不同的断层图形重建模型显示出不同的性能,突出显示了模型选择的重要性.

结论:

SXR断层扫描是诊断融合器件中MHD不稳定的一个有价值的工具.
整合额外的交叉SXR视线对于提高诊断准确性至关重要.
这些发现支持使用SXR断层扫描来验证融合研究中的快速离子相互作用模型.

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