Küchemann Stefan, Mahn Carsten, Samwer Konrad
1. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
Rev Sci Instrum. 2014 Jan;85(1):016105. doi: 10.1063/1.4863656.
The investigation of short time dynamics using X-ray scattering techniques is commonly limited either by the read out frequency of the detector or by a low intensity. In this paper, we present a chopper system, which can increase the temporal resolution of 2D X-ray detectors by a factor of 13. This technique only applies to amorphous or polycrystalline samples due to their circular diffraction patterns. Using the chopper, we successfully increased the temporal resolution up to 5.1 ms during synchrotron experiments. For the construction, we provide a mathematical formalism, which, in principle, allows an even higher increase of the temporal resolution.
利用X射线散射技术对短时间动力学进行的研究通常受到探测器读出频率或低强度的限制。在本文中，我们展示了一种斩波器系统，它可以将二维X射线探测器的时间分辨率提高13倍。由于非晶或多晶样品具有圆形衍射图案，该技术仅适用于这些样品。在同步加速器实验中，使用该斩波器，我们成功地将时间分辨率提高到了5.1毫秒。对于该装置的构建，我们提供了一种数学形式，原则上允许进一步提高时间分辨率。
