Acquisition of Instrumentation for Research and Student Training in Imaging Fast Dynamics in Macroscopic Disordered Media

该IMR拨款将用于购买超快、高分辨率视频成像系统，用于软凝聚态系统中从微米到几厘米尺度的快速运动的高级成像。pi团队研究的物理系统包括凝胶、胶体、皱巴巴的膜、颗粒材料和多孔介质中的多相流。这项工作的统一主题是研究非平衡系统，其中基本单位比分子尺度大。处理这种非热统计系统的基本理论框架仍处于起步阶段，然而，使用适当的仪器，可以对这些系统的单个宏观“原子和分子”的动力学进行详细成像，这在传统材料中是不可能的。视频成像系统将提高帧率，空间分辨率和我们能够获得的数据流的长度。增加的帧率将允许捕获快速动态，如弹道运动在高度激发颗粒介质；改进的分辨率将有助于解决小的运动，如笼状系统中的热运动，更长的数据流将能够搜索罕见但重要的动态事件，如应力材料中的间歇性裂纹跳跃和屈曲事件。其他本地用户也可以通过网页安排时间来使用该成像系统。用户将得到研究生的帮助，从而扩大他们接触广泛的科学问题的范围。许多项目需要本科生的大量参与，新的能力将使他们接触到材料物理学中一个非常直观分支的先进技术。该IMR拨款将用于购买超快、高分辨率视频成像系统，用于软凝聚态系统中从微米到几厘米尺度的快速运动的高级成像。研究小组研究的物理系统包括凝胶、胶体、皱褶膜、颗粒材料和多孔介质中的多相流。这些都是具有巨大工业重要性的系统，然而，它们也提出了新的基础科学挑战，因为它们是具有统计大小的系统，其基本单位与分子尺度相比非常大。处理这种非热系统的基本理论框架仍处于起步阶段，然而，有了适当的仪器，可以对这些系统的单个宏观“原子和分子”的动力学进行详细的成像，这在传统材料中是不可能的。视频成像系统将提高帧率、空间分辨率和数据流的长度，使研究新现象成为可能。除了由调查人员自行安排的项目外，其他本地用户可透过网页安排时间，使用影像系统。用户将得到研究生的帮助，从而扩大他们接触广泛的科学问题的范围。许多项目需要本科生的大量参与，新的能力将使他们接触到材料物理学中一个非常直观分支的先进技术。

This IMR grant will enable the purchase of an ultrafast, high-resolution, video-imaging system for advanced imaging of fast motions in soft-condensed matter systems from a scale of microns to several centimetres. The physical systems worked on by the group of PIs include gels, colloids, crumpled membranes, granular materials, and multiphase flow in porous media. The unifying theme in this work is the study of non-equilibrium systems in which the elementary units are large compared to molecular scales. The underlying theoretical framework to deal with such non-thermal statistical systems is still in its infancy, however, with the appropriate instrumentation it is possible to perform detailed imaging of the dynamics of the individual macroscopic "atoms and molecules" of these systems in a way that is not possible in conventional materials. The video-imaging system will enhance the frame rate, spatial resolution and the length of data streams we are able to acquire. The increased frame rate will allow capturing fast dynamics, such as ballistic motions in highly excited granular media; the improved resolution will help resolve small motions such as thermal motions in caged systems and longer data streams will enable a search for rare but important dynamical events such as intermittent crack jumps and buckling events in stressed materials. The imaging system will also be available to other local users by scheduling time via a webpage. The users will be aided by graduate students, thus broadening their exposure to a broad spectrum of scientific problems. Many of the projects involve considerable involvement by undergraduate students and the new capabilities will afford them exposure to advanced techniques in a very visual branch of materials physics.This IMR grant will enable the purchase of an ultrafast, high-resolution, video-imaging system for advanced imaging of fast motions in soft-condensed matter systems from a scale of microns to several centimetres. The physical systems worked on by the group of investigators include gels, colloids, crumpled membranes, granular materials, and multiphase flow in porous media. These are all systems of immense industrial importance, however, they also present new basic scientific challenges in that they are statistically-sized systems with elementary units that are very large compared to molecular scales. The underlying theoretical framework to deal with such non-thermal systems is still in its infancy, however, with the appropriate instrumentation it is possible to perform detailed imaging of the dynamics of the individual macroscopic "atoms and molecules" of these systems in a way that is not possible in conventional materials. The video-imaging system will enhance the frame rate, spatial resolution and the length of data streams making it possible to study new phenomena. Apart from projects scheduled by the investigators themselves, the imaging system will be available to other local users by scheduling time via a webpage. The users will be aided by graduate students, thus broadening their exposure to a broad spectrum of scientific problems. Many of the projects involve considerable involvement by undergraduate students and the new capabilities will afford them exposure to advanced techniques in a very visual branch of materials physics.