A portable on-axis laser heating system for near-90? X-ray spectroscopy: Application to ferropericlase and iron silicide
A portable on-axis laser heating system for near-90? X-ray spectroscopy: Application to ferropericlase and iron silicide
复制标题
适合近 90 度的便携式同轴激光加热系统？
DOI：
10.1107/s1600577519017041
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Wilk
中科院分区：
文献类型：
--
作者：
Spiekermann G.;Kupenko I.;Petitgirard S.;Harder M.;Nyrow A.;Weis C.;Albers C.;Biedermann N.;Libon L.;Sahle C.;Cerantola V.;Glazyrin K.;Sinmyo R.;Kon?pkov? Z.;Morgenroth W.;Sergueev I.;Yava? H.;Dubrovinsky L.;Tolan M.;Sternemann C.;Wilk
本文介绍了一种便携式红外光纤激光加热系统，该系统通过金刚石对顶盒的径向开口与入射X射线束成90°进行信号采集，可用于X射线发射光谱（XES）和核非弹性散射（NIS）光谱的测量。该系统通过单个激光源提供双面同轴加热，并且除了高压环境之外，对入射X射线的衰减为零。的系统，它已被测试的压力超过100 GPa和温度高达3000 K的描述，给出。 激光加热的Mg0.67Fe0.33O的XES光谱表明，在地球下地幔的压力-温度范围内的铁自旋状态的映射的潜力，和激光加热的FeSi的NIS光谱给访问到地球的核心内的一个阶段的这个候选人的声速。这款便携式系统是跨越激光加热和高分辨率X射线光谱之间差距的为数不多的桥梁之一，信号收集接近90°。
A portable IR fiber laser-heating system, optimized for X-ray emission spectroscopy (XES) and nuclear inelastic scattering (NIS) spectroscopy with signal collection through the radial opening of diamond anvil cells near 90°with respect to the incident X-ray beam, is presented. The system offers double-sided on-axis heating by a single laser source and zero attenuation of incoming X-rays other than by the high-pressure environment. A description of the system, which has been tested for pressures above 100 GPa and temperatures up to 3000 K, is given. The XES spectra of laser-heated Mg0.67Fe0.33O demonstrate the potential to map the iron spin state in the pressure–temperature range of the Earth's lower mantle, and the NIS spectra of laser-heated FeSi give access to the sound velocity of this candidate of a phase inside the Earth's core. This portable system represents one of the few bridges across the gap between laser heating and high-resolution X-ray spectroscopies with signal collection near 90°.