概括
一种新的Classified One Point Calibrated LIBS (COPC-LIBS) 方法精确地分析了托卡马克内部墙壁上的杂质沉积物. 该技术改进了现有的实时诊断方法,提高了聚变装置操作安全性.
科学领域:
- 核聚变工程 核聚变工程
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 在tokamaks中的等离子面材料 (PFC) 上的杂质沉积对稳定的运行构成风险.
- 精确的实时分析真空下的薄共同沉积层具有挑战性.
- 了解这些层对于管理聚变装置中的等离子体壁相互作用至关重要.
研究的目的:
- 开发一种先进的激光诱导分解光谱 (LIBS) 方法,用于对托卡马克内部墙壁上共同沉积的杂质层进行精确的定量分析.
- 克服矩阵效应,限制现有的LIBS算法在复杂样本组合中的准确性.
- 为监测和减轻核聚变反应堆中杂质积累提供可靠的诊断工具.
主要方法:
- 准备30个共同沉积的层样本,模拟托卡马克条件,具有不同构成的,,铁和铜.
- 修改后的LIBS算法的应用,一个点校准LIBS (OPC-LIBS),在真空下 (5 × 10−5 mbar).
- 开发和实施分类OPC-LIBS (COPC-LIBS) 模型,包括预分类以解决矩阵效应.
主要成果:
- 标准CF-LIBS方法在分析中产生了14.7的根平均平方误差 (RMSE).
- 使用OPC-LIBS方法改善了RMSE,达到11.5.
- 新的COPC-LIBS方法显著降低了的RMSE到5.1,证明了卓越的准确性.
结论:
- 在tokamaks中,COPC-LIBS方法提供了一个高效和精确的解决方案,用于分析内墙材料上的共同沉积层.
- 这种技术增强了在现场实时诊断杂质沉积物的能力.
- 来自COPC-LIBS的诊断数据将对理解等离子体壁相互作用和确保聚变装置的运行完整性具有宝贵的价值.
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