DIASCoPE: Directly integrated acoustic system combined with pressure experiments-A new method for fast acoustic velocity measurements at high pressure.
DIASCoPE: Directly integrated acoustic system combined with pressure experiments-A new method for fast acoustic velocity measurements at high pressure.
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DIASCoPE：直接集成声学系统与压力实验相结合——高压下快速声速测量的新方法。
DOI：
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发表时间：
2017
影响因子：
1.6
通讯作者：
W. Huebsch
中科院分区：
文献类型：
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作者：
M. Whitaker;K. J. Baldwin;W. Huebsch
在阿贡国家实验室先进光子源的光束线6-BM-B上安装了一套新的实验系统，用于在极端压力和温度条件下在多砧装置中原位测量样品的弹性波速。该系统允许通过超声波干涉测量测量声速，并利用同步加速器光束通过x射线衍射测量样品密度，使用x射线成像测量样品长度。该系统完全集成到光束线的自动化软件控制中，能够在不到15秒的时间内收集弹性波传播时间的可靠数据，这比现有系统改进了一到两个数量级。此外，这种快速的数据收集时间已被证明对获得的旅行时间结果没有影响。这允许更仔细地研究与时间相关的现象，并在更短的时间内捕捉过程，否则在其他声学测量系统中会丢失或平均。
A new experimental system to measure elastic wave velocities in samples in situ under extreme conditions of pressure and temperature in a multi-anvil apparatus has been installed at Beamline 6-BM-B of the Advanced Photon Source at Argonne National Laboratory. This system allows for measurement of acoustic velocities via ultrasonic interferometry, and makes use of the synchrotron beam to measure sample densities via X-ray diffraction and sample lengths using X-radiographic imaging. This system is fully integrated into the automated software controls of the beamline and is capable of collecting robust data on elastic wave travel times in less than 1 s, which is an improvement of more than one to two orders of magnitude over existing systems. Moreover, this fast data collection time has been shown to have no effect on the obtained travel time results. This allows for more careful study of time-dependent phenomena with tighter snapshots in time of processes that would otherwise be lost or averaged out in other acoustic measurement systems.