Pulsed laser heating and temperature determination in a diamond anvil cell
Pulsed laser heating and temperature determination in a diamond anvil cell
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金刚石砧室中的脉冲激光加热和温度测定
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
I. Silvera
中科院分区：
文献类型：
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作者：
S. Deemyad;E. Sterer;C. Barthel;S. Rekhi;J. Tempere;I. Silvera
与连续波加热相比，金刚石砧座中的脉冲激光加热具有多个优点：它可以抑制加压介质热激活扩散到垫片和金刚石中，抑制杂质与样品和环境的化学反应，需要的平均功率要少得多，因此对样品环境的加热也更少，并且可以达到非常高的温度。最近的研究表明，可以使用脉冲激光和简单的非门控 CCD 探测器在环境条件下精确测量铂和其他材料的熔点，并测量时间平均辐照度。我们证明，同样的技术可用于金刚石砧室中的高压样品。作为演示，再现了铁的高压熔化曲线并与文献值进行比较。
Pulsed laser heating in a diamond anvil cell has several advantages over cw heating: it can suppress thermally activated diffusion of the pressurization medium into the gasket and diamond, suppress chemical reactions of impurities with the sample and environment, requires far less average power and thus less heating of the sample environment, and can attain very high temperatures. It was recently shown that it is possible to accurately measure the melting point of platinum and other materials at ambient conditions using a pulsed laser and a simple ungated CCD detector, measuring the time-averaged irradiance. We show that this same technique can be used for high-pressure samples in a diamond anvil cell. As a demonstration, the high-pressure melting curve of iron is reproduced and compared to literature values.