High-pressure and high-temperature neutron-diffraction experiments using Kawai-type multi-anvil assemblies
High-pressure and high-temperature neutron-diffraction experiments using Kawai-type multi-anvil assemblies
复制标题
使用 Kawai 型多砧组件进行高压高温中子衍射实验
DOI：
10.1080/08957959.2020.1867723
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发表时间：
2021
影响因子：
2
通讯作者：
Kagi Hiroyuki
中科院分区：
文献类型：
--
作者：
Sano-Furukawa Asami;Kakizawa Sho;Shito Chikara;Hattori Takanori;Machida Shinichi;Abe Jun;Funakoshi Ken-ichi;Kagi Hiroyuki
我们应用Kawai型多砧组件（MA 6 -8）进行飞行时间中子衍射实验，以同时实现高压和高温。为了获得足够的信号强度，使用第一阶段砧座上的狭缝和锥形来扩大对样品的角度访问。使用SiC粘结剂烧结金刚石作为第二级砧，传输中子，在23.1 GPa的高压下实现了足够的信号强度。 还在16.2 GPa和973 K下进行了高温实验，验证了碳化钨用于第二级顶砧。 本研究揭示了MA 6 -8单元在中子衍射实验中获得的压力和温度超出了MLF，J-PARC高压中子衍射仪PLANET中使用的常规MA 6 -6单元的限制的能力。
We applied Kawai-type multi-anvil assemblies (MA6-8) for time-of-flight neutron-diffraction experiments to achieve high-pressures and high-temperatures simultaneously. To achieve sufficient signal intensities, the angular access to the sample was enlarged using slits and tapers on the first-stage anvils. Using SiC-binder sintered diamond for the second-stage anvils that transmits neutrons, sufficient signal intensities were achieved at a high-pressure of ∼23.1 GPa. A high-temperature experiment was also conducted at 16.2 GPa and 973 K, validating the use of tungsten carbide for the second-stage anvils. The present study reveals the capability of the MA6-8 cells in neutron-diffraction experiments to attain pressures and temperatures beyond the limits of the conventional MA6-6 cells used in the high-pressure neutron diffractometer PLANET at the MLF, J-PARC.