磁驱动准等熵加载下Z切石英晶体的折射率

发布时间：2018-02-04 03:47

本文关键词： 磁驱动准等熵加载折射率弹性极限 Z-切石英晶体　出处：《物理学报》2016年04期 　论文类型：期刊论文

【摘要】：基于CQ4脉冲功率实验装置开展了Z-切石英晶体在磁驱动准等熵加载下的窗口折射率修正关系研究.实验中采用激光波长1550 nm的双源光外差测速仪测量获得了Li F窗口和Z-切石英晶体窗口与不同厚度极板界面的粒子速度.利用反积分方法由实验测得的LiF窗口与极板界面粒子速度计算得到了极板的加载磁压力历史;以获得的磁压力为输入条件,采用LS-DYNA计算软件正向计算得到石英晶体窗口与极板界面的真实粒子速度历史.由实验获得的Z-切石英晶体窗口/极板界面表观粒子速度和计算得到的真实粒子速度,获得了Z-切石英晶体弹性极限内的连续的折射率修正关系,将其折射率修正关系的适用压力范围拓宽至14.55 GPa.表观粒子速度与真实粒子速度关系采用线性拟合时,折射率修正关系为n=1.087(±0.008)+0.4408ρ/ρ0,与冲击数据拟合的结果一致.由折射率实验数据对Z-切石英晶体的极化率分析认为,在其弹性极限压力范围内加载路径和温度对折射率的影响可以忽略.
[Abstract]:Based on the CQ4 pulse power experimental device, the window refractive index correction relationship of Z-cut quartz crystal under magnetically driven quasi-isentropic loading is studied. The laser wavelength 1550 is used in the experiment. Li was obtained by using a dual-source optical heterodyne velocimeter at Nm. The particle velocity of the interface between the F window and the quartz crystal window with different thickness is obtained. The loading magnetic pressure history of the polar plate is obtained by calculating the particle velocity at the interface of the LiF window and the polar plate measured experimentally by using the inverse integral method. ; The input condition is based on the obtained magnetic pressure. The real particle velocity history of the interface between quartz crystal window and polar plate was calculated by LS-DYNA software. To the real particle velocity. The continuous refractive index correction relationship within the elastic limit of Z-cut quartz crystal is obtained. The suitable pressure range of the refractive index correction relation is widened to 14.55 GPa.When the relationship between the apparent particle velocity and the real particle velocity is linearly fitted. The corrected relation of refractive index is 1.087 (卤0.008) 0.4408 蟻 / 蟻 0. According to the experimental data of refractive index, the effect of loading path and temperature on the refractive index can be neglected in the range of elastic limit pressure.
【作者单位】：中国工程物理研究院流体物理研究所;中国工程物理研究院;
【基金】：国家自然科学基金(批准号:11327803,11176002,11272295)资助的课题~~
【分类号】：O734.2
【正文快照】： 1引言测量窗口与样品界面粒子速度是材料高压物性研究中获得材料动态响应的一种基本实验方法[1,2].冲击加载下窗口材料的折射率已有较多报道[3 9].准等熵/斜波加载技术提供了一条与冲击加载互补的新的加载路径,其加载压力波形是随时间缓慢上升的非稳定斜波,在材料动力学响应、

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