Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (8): 80101-080101.doi: 10.11889/j.0253-3219.2020.hjs.43.080101

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS • Previous Articles     Next Articles

Research on pulsed laser heating method applied in high-pressure XRD measurement

Weiran CUI1,2,Xiaodong LI1(),Yu GONG1,Yanchun LI1,Dongliang YANG1,Junran ZHANG1,2,Yixuan XU1,2   

  1. 1.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-04-28 Revised:2020-05-20 Online:2020-08-15 Published:2020-08-12
  • Contact: Xiaodong LI E-mail:Lixd@ihep.ac.cn
  • About author:CUI Weiran, male, born in 1990, graduated from Northeast University of Qinhuangdao in 2013, doctoral student, focusing on high temperature and high-pressure experimental technology

Abstract: Background

Compared with the traditional continuous-wave laser heating method, the pulse laser heating (PLH) technology can minimize the heating time to prevent the potential chemical reactions in the sample chamber of diamond anvil cell.

Purpose

This study aims to construct an in-situ pulsed laser heating method which can be applied in high pressure X-ray diffraction experiments.

Methods

Based on the continuous-wave laser heating system of the high-pressure beamline of Beijing synchrotron radiation facility (BSRF), a signal generator was used to synchronize the pulsed laser, charge coupled device (CCD) spectrometer and X-ray detector, made it capable to heat the sample with pulsed laser, and collect the thermal radiation spectrum and high-pressure diffraction data during heating. The temperature stability, repeatability and temperature gradient of Pt samples heated by pulsed laser under high pressure were measured, and the in-situ X-ray diffraction experiments were completed by using the cumulative time method.

Results

Experimental results show that the axial temperature gradient is larger when the temperature is low, but decreases with the increase of temperature. The PLH high-pressure XRD experimental data of Pt with good quality are collected by using the in-situ X-ray diffraction patterns.

Conclusions

The in-situ PLH method for high-pressure X-ray diffraction experiments enables the pulsed laser to have heating ability at the high-pressure beamline of BSRF, and lays a foundation for the future research on the application of related methods at the new High Energy Photon Source (HEPS) in Beijing.

Key words: Synchrotron radiation, High pressure, Pulsed laser heating, X-ray diffraction

CLC Number: 

  • TL99