Acquisition of a 1000-Ton Multianvil Press for High Pressure Research

一个新的多砧压力机机架将安装在亚利桑那州立大学（ASU）的高压实验室里。这是一个联合使用的设施，用于矿物物理学、地球化学和实验岩石学的研究，以及材料合成和性质的研究。此次收购的主要目的是扩大现有的多砧设备，使其包括300至1000吨的力范围，从而能够进行更高的压力实验，并允许获得更大的样品。具体来说，该框架的1000吨能力将用于将ASU在温度高达2800℃时的可用压力范围扩展到约27 GPa，并在较低压力下增加实验中的样本量。扩大的合成压力范围对于制备已知和新型高压相（如石榴石、钙钛矿和超高压玻璃）以及材料合成和矿物物理中的压力诱导非晶化研究都很重要。更大的样本量将用于材料表征和性能测量，以及设计多包膜胶囊环境，这在控制氧化还原态岩石学设计和材料合成实验中具有重要意义。对于地球科学来说，新的压机将允许对过渡带和下地幔的P-T范围进行超高压地质研究，并改善对运行环境的控制，以重现地球内部的化学条件。主要的重点将是控制地幔系统中的氧逸度和水含量。印刷机的制造和安装预计在6个月内完成。在剩下的时间里，科学项目将继续进行，然后压力机将作为亚利桑那州立大学高压设施的永久设备运行。＊＊＊

9520860 Holloway A new multianvil press frame will be installed in the high- pressure laboratory at Arizona State University (ASU). This is a joint use facility for studies in mineral physics, geochemistry and experimental petrology, and studies in materials synthesis and properties. The major purpose of this acquisition will be to augment the existing multianvil facilities to include the force range between 300 and 1000 tons, enabling higher pressure experiments to be performed, and allowing larger samples to be obtained. Specifically, the 1000 ton capability of the frame will be used both to extend the available pressure range at ASU to approximately 27 GPa at temperatures up to 2800 C, and to increase the sample size in experiments at lower pressures. The extended range of synthesis pressures will be important in preparation of both known and novel high pressure phases, such as garnets, perovskites and ultra-high pressure glasses, and in pressureinduced amorphization studies in materials synthesis and mineral physics. The larger sample size will be utilized for materials characterization and properties measurements, and for design of multienclosure capsule environments, which are important in design of controlled redox state petrology and in materials synthesis experiments. For Earth sciences, the new press will allow ultra-high pressure geological studies to the P-T range of the transition-zone and lower mantle, with improved control of the run environment to reproduce chemical conditions within the Earth. The principal focus will be on controlling oxygen fugacity and H2O content in mantle systems. Fabrication and installation of the press is projected at 6 months. Scientific projects will proceed for the remainder of the time, and the press will then be operated as a permanent piece of equipment in the ASU high- pressure facility. ***