ABSTRACT

A new custom-designed cooling system is described that was developed for the SAPHiR three-axis multi-anvil press with MA6-6 anvil geometry at the FRM II neutron source in Garching. The system was designed to remove heat from the secondary anvils by flowing a cryogen around custom-designed cooling rings or cooling jackets. Currently, this cryo-system is capable of achieving temperatures of 83 K without interfering with the anvil geometry and pressure transfer, thus not limiting the attainable maximum pressure or the capability of performing deformation experiments. In this study, pressures of up to ca. 8 GPa were attained at 83 K with sample volumes up to 130 mm³. The system is portable and can be implemented into any three-axis multi-anvil press with a MA6-6 anvil geometry, opening up new areas of high pressure cryo-research at synchrotron and neutron facilities, including investigating the interior of icy moons.

摘要

描述了一种新的定制设计冷却系统，该系统是为在 Garching 的 FRM II 中子源处具有 MA6-6 砧几何形状的 SAPHiR 三轴多砧压机开发的。该系统旨在通过在定制设计的冷却环或冷却夹套周围流动冷冻剂来去除辅助砧座的热量。目前，该低温系统能够在不干扰砧几何形状和压力传递的情况下实现 83 K 的温度，因此不会限制可达到的最大压力或进行变形实验的能力。在这项研究中，压力高达约。在 83 K 时达到 8 GPa，样品体积高达 130 mm ³. 该系统是便携式的，可以实施到任何具有 MA6-6 砧几何形状的三轴多砧压机中，为同步加速器和中子设施的高压低温研究开辟了新的领域，包括研究冰卫星的内部。