Mukharamova Nastasia, Lazarev Sergey, Meijer Janne-Mieke, Gorobtsov Oleg Yu, Singer Andrej, Chollet Matthieu, Bussmann Michael, Dzhigaev Dmitry, Feng Yiping, Garten Marco, Huebl Axel, Kluge Thomas, Kurta Ruslan P, Lipp Vladimir, Santra Robin, Sikorski Marcin, Song Sanghoon, Williams Garth, Zhu Diling, Ziaja-Motyka Beata, Cowan Thomas E, Petukhov Andrei V, Vartanyants Ivan A
Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607, Hamburg, Germany.
National Research Tomsk Polytechnic University (TPU), pr. Lenina 30, 634050, Tomsk, Russia.
Sci Rep. 2020 Jul 1;10(1):10780. doi: 10.1038/s41598-020-67214-z.
With the rapid development of short-pulse intense laser sources, studies of matter under extreme irradiation conditions enter further unexplored regimes. In addition, an application of X-ray Free-Electron Lasers (XFELs) delivering intense femtosecond X-ray pulses, allows to investigate sample evolution in IR pump - X-ray probe experiments with an unprecedented time resolution. Here we present a detailed study of the periodic plasma created from the colloidal crystal. Both experimental data and theory modeling show that the periodicity in the sample survives to a large extent the extreme excitation and shock wave propagation inside the colloidal crystal. This feature enables probing the excited crystal, using the powerful Bragg peak analysis, in contrast to the conventional studies of dense plasma created from bulk samples for which probing with Bragg diffraction technique is not possible. X-ray diffraction measurements of excited colloidal crystals may then lead towards a better understanding of matter phase transitions under extreme irradiation conditions.
随着短脉冲强激光源的迅速发展，对极端辐照条件下物质的研究进入了进一步未探索的领域。此外，应用产生强飞秒X射线脉冲的X射线自由电子激光器（XFEL），使得在红外泵浦-X射线探测实验中以前所未有的时间分辨率研究样品演化成为可能。在此，我们对由胶体晶体产生的周期性等离子体进行了详细研究。实验数据和理论建模均表明，样品中的周期性在很大程度上能经受住胶体晶体内的极端激发和冲击波传播。与对块状样品产生的稠密等离子体的传统研究不同，后者无法用布拉格衍射技术进行探测，而这一特性使得利用强大的布拉格峰分析来探测受激晶体成为可能。对受激胶体晶体的X射线衍射测量可能会有助于更好地理解极端辐照条件下的物质相变。
