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在国家点火设施 (受邀) 开发时间解析的X射线衍射诊断 (受邀)

N E Palmer¹, L R Benedetti¹, C E Vennari¹

¹Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

The Review of scientific instruments

|September 17, 2024

概括

新的X射线成像诊断被开发来测量在动态压缩下相位过渡时间尺度. 这些诊断使用封闭式混合CMOS传感器,并已改进,以提高数据质量和激光驱动实验的灵活性.

科学领域:

材料科学材料科学材料科学
高能量密度物理学高能量密度物理学
射线科学X射线科学X射线科学

背景情况:

在动态压缩下测量相位过渡时间表对于材料科学至关重要.
现有的方法在恶劣的实验环境和信号噪声比率中面临挑战.

研究的目的:

设计和开发先进的X射线成像诊断,用于动态压缩实验的现场测量.
克服环境挑战,提高X射线衍射数据质量.

主要方法:

发展分阶段诊断,从一个示范平台开始 (Gated Diffraction Development Diagnostic). 发展分阶段诊断.
实现一个灵活的仪器 (激光实验的灵活成像衍射诊断) 与多个ns-gated混合CMOS传感器.
在恶劣环境中保护传感器免受碎片,电磁脉冲和激光照射的影响.

主要成果:

在演示阶段成功保护传感器并获取可接受的衍射数据.
开发了一种更雄心勃勃的仪器,能够在灵活的几何形状中对最多八个传感器进行测试.
在国家点火设施 (NIF) 中,识别和解决与复杂性和数据质量相关的挑战的进展.

结论:

阶段性开发方法有效地评估了风险,并解决了设计复杂X射线诊断的挑战.
激光实验的灵活成像衍射诊断器为研究动态压缩提供了增强的能力.
目前的工作重点是减少X射线背景和量化测量不确定性,以提高数据质量.

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