A Static High Pressure Diamond Counter Anvil Device Applicable to Laser Dynamic Loading Experiment

Abstract

The invention discloses a static high pressure diamond anvil cell device suitable for laser dynamic loading experiments, the static high pressure diamond anvil cell device comprises a front pressing cavity, a rear pressing chamber and an anvil cell sample system, the front pressing chamber and the rear pressing chambers are fixedly connected by a pressure bolt, the front pressing chamber and the rear pressing chamber enclose a chamber, the anvil cell sample system is placed in the chamber, the front pressing chamber and the rear pressing chamber are respectively provided with a plurality of fastening screws, and the anvil cell sample system is fixed in the chamber by the fastening screws; according to the requirements of the laser dynamic high pressure loading physical experiments, the diamond structure and the assembly process of the new diamond anvil cell device suitable for the laser dynamic loading experiments can be improved, the initial pressure / density of the material can be changed, and the new diamond anvil cell device is used for experimental studies on a material wide-domain state equation. The device enables a liquid such as water or ethanol to be at a pressure of 2 GPaor more at normal temperature and is stable during the experiments.

Description

technical field [0001] The invention belongs to the field of dynamic high-pressure physics research of materials under extreme conditions, and in particular relates to a static high-pressure diamond counter-anvil device suitable for laser dynamic loading experiments. Background technique [0002] The diamond counter-anvil is composed of a pair of diamond counter-anvils and a sealing gasket. Put the sample and pressure measuring ruby ​​into the diamond counter-anvil sealing gasket at the same time, and tighten the pressure anvil. Because the contact surface of the two diamonds is small, the diamond pressure chamber can be pressurized by an external mechanical device to obtain high pressure. The diamond-anvil technique has become an important method for studying the structural properties and phase transitions of materials under extreme static pressure conditions. [0003] The Shenguang-II high-power laser device is the earliest high-power laser device built in China. Many hig...

AI Technical Summary

Problems solved by technology

According to the laser conditions of the Shenguang-II device and the characteristics of laser dynamic loading, the thickness of the diamond anvil on the laser incident surface should not exceed 200 μm, otherwise, due to the attenuation of the shock wave in the diamond and the influence of side sparse waves, the dynamic loading pressure will be weakened and The range of the shock wave is reduced, and the experimental target cannot be reached

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