Device and method for measuring deformation of diamond anvil under extreme high temperature and high pressure conditions

Abstract

The invention relates to the field of non-contact measurement, in particular to a device and method for measuring deformation of a diamond anvil under extreme high temperature and high pressure conditions. Aiming at the problems in the prior art, the present invention provides a device and method capable of measuring the deformation of a diamond anvil under extreme high temperature and high pressure conditions. Specifically, the deformation of the diamond anvil under extreme high temperature and high pressure conditions is obtained through the detection light emitting optical path, the signal receiving optical path, and the signal processing computer; the detection light emitting optical path provides broadband detection light, and the signal receiving optical path collects The signal light returned from the front surface and the reference light returned from the back surface, the two beams of light undergo spectral interference in the fiber optic spectrometer in the signal receiving optical path; the spectral interference signal output by the fiber optic spectrometer is processed by the computer to obtain the diamond anvil under extreme high temperature and high pressure. deformation under conditions.

Description

technical field [0001] The invention relates to the field of non-contact measurement, in particular to a device and method for measuring deformation of a diamond anvil under extreme high temperature and high pressure conditions. Background technique [0002] The invention and application of the diamond press (DAC) is a major breakthrough in the field of static high pressure experimental research, and it is also the most common high pressure generating device in the field of static high pressure research. Its ability to generate ultra-high pressure provides people with a deeper understanding of the extreme high temperature of matter Possibility of physical and chemical properties under high pressure conditions. With the help of DAC loading technology, people have carried out studies on the phase transition, state equation, intensity, sound velocity, optical properties, magnetic properties, and electrical properties of substances under extreme high temperature and high pressur...

AI Technical Summary

Problems solved by technology

The deformation of the diamond anvil under high pressure is mainly evaluated by finite element numerical simulation, X-ray transmission imaging and contact micrometer measurement; the finite element numerical simulation depends on the established model and the characteristics of the diamond anvil and the gasket material parameters, the X-ray transmission imaging method requires a high-brightness synchrotron radiation light source and consumes a lot of precious synchrotron radiation machine hours, and the micrometer measurement method is a contact measurement with limited measurement accuracy, and cannot give the shape of the deformation of the anvil table

To sum up, there is currently no effective method to measure the deformation of diamond anvils under high temperature and high pressure, and it is difficult to meet the requirements of in-situ accurate measurement of sample thickness under DAC loading conditions.

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