Konôpková Zuzana, Morgenroth Wolfgang, Husband Rachel, Giordano Nico, Pakhomova Anna, Gutowski Olof, Wendt Mario, Glazyrin Konstantin, Ehnes Anita, Delitz Jan Torben, Goncharov Alexander F, Prakapenka Vitali B, Liermann Hanns Peter
Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany.
Institut für Geowissenschaften, Kristallographie/Mineralogie, Goethe Universität Frankfurt am Main, Altenhöferallee 1, D-60438 Frankfurt am Main, Germany.
J Synchrotron Radiat. 2021 Nov 1;28(Pt 6):1747-1757. doi: 10.1107/S1600577521009231. Epub 2021 Oct 7.
A laser heating system for samples confined in diamond anvil cells paired with in situ X-ray diffraction measurements at the Extreme Conditions Beamline of PETRA III is presented. The system features two independent laser configurations (on-axis and off-axis of the X-ray path) allowing for a broad range of experiments using different designs of diamond anvil cells. The power of the continuous laser source can be modulated for use in various pulsed laser heating or flash heating applications. An example of such an application is illustrated here on the melting curve of iron at megabar pressures. The optical path of the spectroradiometry measurements is simulated with ray-tracing methods in order to assess the level of present aberrations in the system and the results are compared with other systems, that are using simpler lens optics. Based on the ray-tracing the choice of the first achromatic lens and other aspects for accurate temperature measurements are evaluated.
本文介绍了一种用于金刚石对顶砧中样品的激光加热系统,该系统与PETRA III极端条件光束线的原位X射线衍射测量相结合。该系统具有两种独立的激光配置(X射线路径的轴上和轴外),允许使用不同设计的金刚石对顶砧进行广泛的实验。连续激光源的功率可以调制,以用于各种脉冲激光加热或闪光加热应用。本文以兆巴压力下铁的熔化曲线为例说明了此类应用。用光线追踪方法模拟了光谱辐射测量的光路,以评估系统中当前像差的水平,并将结果与使用更简单透镜光学系统的其他系统进行比较。基于光线追踪,评估了第一块消色差透镜的选择以及精确温度测量的其他方面。