Martin Kunz, Katherine Armstrong, Harold Barnard, Hans A. Bechtel, Samantha C. Couper, Bora Kalkan, Harry Lisabeth, Alastair A. MacDowell, Lowell Miyagi, Dilworth Y. Parkinson, Nobumichi Tamura, Quentin Williams
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引用次数: 0
摘要
使用同步辐射 X 射线设施已成为地球科学实验中许多学科的一个重要方面。这对于那些依赖于在不同于地球表面的自然条件下就地探测样本的研究尤为重要。劳伦斯伯克利国家实验室先进光源(ALS)的非环境条件地球科学计划提供了各种利用红外和硬 X 射线光谱的工具,使地球科学家能够在压力、应力、温度、大气成分和湿度等不同条件下探测地球和环境材料。这些设施对用户群体来说是重要的工具,因为它们不仅提供了相当大的能力(非环境条件衍射),而且还提供了互补性(红外光谱学、微层析成像),在某些情况下还提供了独特的(Laue 微衍射)仪器。在芝加哥高级光子源的黑暗期,北美同步加速器用户的现场使用时间大为减少,因此向地球科学界提供 ALS 的现场探测器就变得尤为重要。
In situ X-ray and IR probes relevant to Earth science at the Advanced Light Source at Lawrence Berkeley Laboratory
Access to synchrotron X-ray facilities has become an important aspect for many disciplines in experimental Earth science. This is especially important for studies that rely on probing samples in situ under natural conditions different from the ones found at the surface of the Earth. The non-ambient condition Earth science program at the Advanced Light Source (ALS), Lawrence Berkeley National Laboratory, offers a variety of tools utilizing the infra-red and hard X-ray spectrum that allow Earth scientists to probe Earth and environmental materials at variable conditions of pressure, stress, temperature, atmospheric composition, and humidity. These facilities are important tools for the user community in that they offer not only considerable capacity (non-ambient condition diffraction) but also complementary (IR spectroscopy, microtomography), and in some cases unique (Laue microdiffraction) instruments. The availability of the ALS’ in situ probes to the Earth science community grows especially critical during the ongoing dark time of the Advanced Photon Source in Chicago, which massively reduces available in situ synchrotron user time in North America.
期刊介绍:
Physics and Chemistry of Minerals is an international journal devoted to publishing articles and short communications of physical or chemical studies on minerals or solids related to minerals. The aim of the journal is to support competent interdisciplinary work in mineralogy and physics or chemistry. Particular emphasis is placed on applications of modern techniques or new theories and models to interpret atomic structures and physical or chemical properties of minerals. Some subjects of interest are:
-Relationships between atomic structure and crystalline state (structures of various states, crystal energies, crystal growth, thermodynamic studies, phase transformations, solid solution, exsolution phenomena, etc.)
-General solid state spectroscopy (ultraviolet, visible, infrared, Raman, ESCA, luminescence, X-ray, electron paramagnetic resonance, nuclear magnetic resonance, gamma ray resonance, etc.)
-Experimental and theoretical analysis of chemical bonding in minerals (application of crystal field, molecular orbital, band theories, etc.)
-Physical properties (magnetic, mechanical, electric, optical, thermodynamic, etc.)
-Relations between thermal expansion, compressibility, elastic constants, and fundamental properties of atomic structure, particularly as applied to geophysical problems
-Electron microscopy in support of physical and chemical studies
-Computational methods in the study of the structure and properties of minerals
-Mineral surfaces (experimental methods, structure and properties)