Single photon energy dispersive x-ray diffraction.
Single photon energy dispersive x-ray diffraction.
复制标题
单光子能量色散 X 射线衍射。
DOI：
--
复制
发表时间：
2014
影响因子：
1.6
通讯作者：
J. Wark
中科院分区：
文献类型：
--
作者：
A. Higginbotham;S. Patel;J. Hawreliak;O. Ciricosta;Gilbert W. Collins;F. Coppari;J. Eggert;M. Suggit;H. Tang;J. Wark
随着固体材料激光驱动压缩实验可达到的压力范围的迅速增加，在恶劣激光环境下对样品进行诊断的新挑战正在出现。当驱动到TPa压力（与行星内部高度相关的条件）时，传统的X射线衍射技术受到背景和噪声源增加以及信号潜在减少的困扰。在本文中，我们提出了一种新的衍射诊断设计记录X射线衍射在低信号噪声环境。通过利用单光子计数技术，我们证明了能够记录纳秒时间尺度上的衍射图案，随后分离，光子由光子，信号从背景。在这样做的过程中，我们缓解了许多问题，围绕使用高强度激光驱动样品的极端压力，允许结构信息，以获得在一个制度，这是目前在很大程度上未探索。
With the pressure range accessible to laser driven compression experiments on solid material rising rapidly, new challenges in the diagnosis of samples in harsh laser environments are emerging. When driving to TPa pressures (conditions highly relevant to planetary interiors), traditional x-ray diffraction techniques are plagued by increased sources of background and noise, as well as a potential reduction in signal. In this paper we present a new diffraction diagnostic designed to record x-ray diffraction in low signal-to-noise environments. By utilising single photon counting techniques we demonstrate the ability to record diffraction patterns on nanosecond timescales, and subsequently separate, photon-by-photon, signal from background. In doing this, we mitigate many of the issues surrounding the use of high intensity lasers to drive samples to extremes of pressure, allowing for structural information to be obtained in a regime which is currently largely unexplored.
DOI：
10.1063/1.3160018
发表时间：
2009-07
期刊：
The Review of scientific instruments
影响因子：
--
作者：
G. Hansford
通讯作者：
G. Hansford
影响因子：
8.6
作者：
Comley, A. J.;Maddox, B. R.;Wark, J. S.
通讯作者：
Wark, J. S.
影响因子：
41.2
作者：
Loa, I.;Nelmes, R. J.;McMahon, M. I.
通讯作者：
McMahon, M. I.