npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041
Qrcode

Article

Research Paper

New Phys.: Sae Mulli 2019; 69: 1107-1114

Published online October 31, 2019 https://doi.org/10.3938/NPSM.69.1107

Copyright © New Physics: Sae Mulli.

Installation and Operation of a Double-Sided Laser Heating System for the Synthesis of Novel Materials Under Extreme Conditions

Young-Ho KO*, Kyoung Hun OH, Kwang Joo KIM

4-2-2, Agency for Defense Development, P.O. Box 35, YuSeong, DaeJeon, 34186, Republic of Korea

Correspondence to:yhko@add.re.kr

Received: July 12, 2019; Revised: August 27, 2019; Accepted: August 28, 2019

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Producing extremely stable high temperature and pressure condition is crucial in order to synthesize novel materials with various functions and to investigate their static and dynamic properties. Already a high pressure in the Mbar range, which is necessary to make novel materials, can be acquired by using a Diamond Anvil Cell (DAC), In this study, a laser-heating system combined with the DAC was designed and installed using two 1064-nm, 100-W fiber lasers on different sides of the DAC to heat the sample and three spectrometers to measure the temperature, pressure, and Raman spectra. A stainless-steel gasket, which is generally used as a sample chamber in high-pressure experiments, was heated to make a thermal radiation source, and the temperature of the heated gasket was obtained by measuring the spectrum of the radiation. By applying this technique, we were able to make various materials and to investigate their physical properties under extreme conditions.

Keywords: Laser heating, Diamond anvil cell, Extreme conditions, Confocal Raman spectroscopy

다양한 기능의 새로운 물질을 합성하고 정적 및 동적 특성을 조사하기 위해서는 매우 안정된 고온 및 고압 조건을 만드는 것이 중요하다. 새로운 물질을 제조하는 데 필요한 다이아몬드 엔빌 셀 (DAC)을 사용하여 Mbar 범위의 고압 조건은 이미 확보되었다. 이 연구에서는 DAC와 결합된 레이저 가열 시스템을 설계하였으며, DAC의 양쪽 방향에서 시료를 가열하기 위해 2 대의 1064 nm, 100 W 파이버 레이저를 사용했을 뿐만 아니라 3 대의 분광기를 사용하여 온도, 압력 및 라만 스펙트럼을 측정하였다. 고압 실험에서 시료를 가두는 구멍으로 일반적으로 사용되는 스테인리스 강 개스킷을 가열하여 열 방사선원을 만들고, 이 방사선원으로부터 방출되는 복사 스펙트럼을 획득하여 가열된 개스킷의 온도를 측정하였다. 이 기술을 적용하여 다양한 물질들을 만들고 극한 조건에서 물리적 특성을 조사 할 수 있다.

Keywords: 레이저 가열, 다이아몬드 엔빌 셀, 극한 조건, 공초점 라만 분광

Figures

Fig. 1. (a) Optical shape before entering the Focal-π shaper (1 X magnification) (b) Optical shape after passing through the apochromatic lens (8x magnification) (c) Laser light which is incident on the gasket surface taken by CCD camera.

Stats or Metrics

Share this article on :

Related articles in NPSM