Photonic doppler velocimeter

拟购置的仪器是光子多普勒测速仪（PDV），用于在高速弹道冲击和冲击波实验中获得沿沿着两个轴的极其精确的材料速度历史。生成这种类型的高质量速度历史数据的能力对于麦吉尔大学继续参与弹道防护，冲击波物理和爆炸领域的最先进研究至关重要。随着近十年来数值模拟的发展，连续的数据源对于新模型的验证是必要的。涉及离散“到达时间”数据收集的实验工作现在被该领域的研究人员认为是过时的。在实验中连续记录材料速度历史的能力将使人们能够深入了解许多重要问题。特别是，该方案将利用该系统评价新型陶瓷-金属复合材料和剪切增稠流体装甲，模拟轨道碎片造成的超高速撞击，并研究商用爆破炸药的非理想爆炸传播。以高分辨率、连续的历史测量来研究这些过程的能力将允许模型和计算机模拟得到验证，这反过来又可用于预测和改进这些过程在应用中如何发生。

The proposed instrument to be acquired is a Photonic Doppler Velocimeter (PDV), used to obtain extremely accurate material velocity histories along two axes in high speed ballistic impact and shock wave experiments. The ability to generate this type of high quality velocity history data is essential to McGill University's continued participation in state-of-the-art research in the fields of ballistic protection, shock wave physics, and detonics. With the development of numerical modeling over the past decade, continuous data sources are necessary for the validation of new models. Experimental work involving discrete "time of arrival" data collection is now considered to be obsolete by researchers in the field. The ability to continuously record the material velocity history in an experiment will permit insights into a number of important problems. In particular, this program will use the system in evaluating novel ceramic-metal composite and shear thickening fluid armours, in simulating hypervelocity impacts caused by orbital debris, and in studying nonideal detonation propagation in commercial blasting explosives. The ability to study these processes in a high-resolution, continuous history measurement will permit models and computer simulations to be validated, which in turn can be used to predict and improve how these processes occur in applications.