Single-shot terahertz-field-driven X-ray streak camera
Single-shot terahertz-field-driven X-ray streak camera
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DOI：
10.1038/nphoton.2009.160
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发表时间：
2009-09-01
期刊：
影响因子：
35
通讯作者：
Drescher, Markus
中科院分区：
文献类型：
--
作者：
Fruehling, Ulrike;Wieland, Marek;Drescher, Markus
利用泵浦探测方案实现了一种几飞秒x射线条纹相机，该相机在同步强太赫兹场的存在下对电离软x射线辐射的瞬态响应进行了采样。飞秒x射线条纹相机借用了阿秒计量学的概念，填补了典型分辨率为数百飞秒的传统条纹相机和在亚飞秒范围内运行的条纹技术之间的空白。它的单次发射能力允许确定单个x射线脉冲的持续时间和时间结构。对于时间分辨光谱、衍射或成像的几类实验，设想使用新型加速器和基于激光的短脉冲x射线源，这些知识是必不可少的，但对x射线计量学来说是一个主要挑战。本文报道了来自自由电子激光设备FLASH的软x射线脉冲的单次发射特性。
A few-femtosecond X-ray streak camera has been realized using a pump-probe scheme that samples the transient response of matter to ionizing soft X-ray radiation in the presence of an intense synchronized terahertz field. Borrowing its concept from attosecond metrology, the femtosecond X-ray streak camera fills the gap between conventional streak cameras with typical resolutions of hundreds of femtoseconds and streaking techniques operating in the sub-femtosecond regime. Its single-shot capability permits the duration and time structure of individual X-ray pulses to be determined. For several classes of experiments in time-resolved spectroscopy, diffraction or imaging envisaged with novel accelerator-and laser-based short-pulse X-ray sources this knowledge is essential, but represents a major challenge to X-ray metrology. Here we report on the single-shot characterization of soft X-ray pulses from the free-electron laser facility FLASH.