时间解析的不透明度光谱仪 (OpSpecTR) 的设计和表征,用于NIF铁不透明度运动
Y P Opachich1, B Golick1, J G Buscho1
1Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
The Review of scientific instruments
|August 5, 2024
概括
目前正在为国家点火设施 (NIF) 开发一种新的时间分辨率不透明度光谱仪 (OpSpecTR),以实现高温不透明度测量. 这种先进的诊断可以减少背景噪声,提高关键物理实验的数据质量.
科学领域:
- 等离子体物理学的物理学
- 频谱学是一种光谱学.
- 材料科学 材料科学 材料科学
背景情况:
- 透明度测量对于理解恒星内部和惯性限制融合至关重要.
- 目前在NIF上的不透明度光谱仪由于背景噪声而面临高温实验的限制.
- 更高的温度需要更快的检测方法来减轻自我排放和晚间背景.
研究的目的:
- 为NIF开发和描述一种新的时间解析不透明度光谱仪 (OpSpecTR).
- 通过减少背景干扰来实现更高温度的不透明度测量.
- 呈现诊断设计和初始传感器表征结果.
主要方法:
- 使用Icarus版本2 (IV2) 的混合互补金属氧化物半导体传感器进行封闭式数据采集.
- 实施短整合时间 (∼2 ns) 以尽量减少自我排放和背景.
- 设计光谱仪以覆盖传输频谱的自我发射,背光灯和吸收区域.
主要成果:
- OpSpecTR设计允许在不透明传输信号的精确时刻进行封闭式数据收集.
- 预计随着短时间的整合,自我排放和延迟背景的预计减少高达80%.
- 成功描述了IV2传感器在OpSpecTR诊断中的性能.
结论:
- 在NIF上,OpSpecTR是一个有希望的进步,可以在更高的温度下进行不透明度测量.
- 时间解决能力显著减轻背景噪声,提高数据可靠性.
- 未来对达达卢斯传感器的升级承诺更短的集成时间,以进一步改进测量.
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