class="kwd-title">Method name: Neutron imaging class="kwd-title">Keywords: High temporal resolution neutron imaging, Parabolic focussing guide, Two phase flow, D2O, H2O, Interaction of H2O and D2O class="head no_bottom_margin" id="abs0010title">AbstractThe recent developments in scientific complementary metal oxide semiconductor (sCMOS) detector technology allow for imaging of relevant processes with very high temporal resolution with practically negligible readout time. However, it is neutron intensity that limits the high temporal resolution neutron imaging. In order to partially overcome the neutron intensity problem for the high temporal resolution imaging, a parabolic neutron focussing guide was utilized in the test arrangement and placed upstream the detector in such a manner that the focal point of the guide was positioned slightly behind the scintillator screen. In such a test arrangement, the neutron flux can be increased locally by about one order of magnitude, albeit with the reduced spatial resolution due to the increased divergence of the neutron beam. In a pilot test application, an in-situ titration system allowing for a remote delivery of well-defined volumes of liquids onto the sample stage was utilized. The process of droplets of water (H2O) falling into the container filled with heavy water (D2O) and the subsequent process of the interaction and mixing of the two liquids were imaged with temporal resolution of 0.01 s. class="first-line-outdent">
• Combination of neutron focussing device and use of sCMOS detector allows for very high temporal resolution neutron imaging to be achieved (albeit with reduced spatial resolution and field of view).
• In-situ neutron imaging titration device for liquid interaction experiments.
• Interaction of otherwise indiscernible liquids (H2O and D2O) visualized using neutron radiography with 0.01 s temporal resolution.
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机译：<！-fig ft0-> <！-fig @ position =“ anchor” mode =文章f4-> <！-fig mode =“ anchred” f5-> <！-fig / graphic | fig / alternatives / graphic mode =“ anchored” m1-> class =“ kwd-title”>方法名称： Neutron Imaging class =“ kwd-title”>关键字：高时间中子成像，抛物线聚焦向导，两相流，D2O，H2O，H2O和D2O的相互作用 class =“ head no_bottom_margin” id =“ abs0010title”>摘要科学互补金属氧化物半导体的最新进展（ sCMOS）检测器技术允许以非常高的时间分辨率对相关过程进行成像，而读出时间实际上可以忽略不计。然而，正是中子强度限制了高时间分辨率中子成像。为了部分克服高时间分辨率成像的中子强度问题，在测试装置中使用了抛物线型中子聚焦导向器，并将其放置在检测器的上游，使导向器的焦点位于闪烁器屏幕的稍后方。在这样的测试装置中，尽管由于中子束发散的增加而使空间分辨率降低，但是中子通量可以局部地增加大约一个数量级。在中试应用中，使用了原位滴定系统，该系统可将确定体积的液体远程输送到样品台上。用0.01 s的时间分辨率对水滴（H2O）落入装有重水（D2O）的容器中的过程以及随后的两种液体的相互作用和混合过程进行了成像。 class =“ first-line -outdent“> <！-list-behavior =简单的前缀-word = mark-type = none max-label-size = 9->
