Upgrade of the Raman Spectroscopy System at the High-Pressure Lab of Arizona State University

亚利桑那州立大学高压实验室拉曼光谱系统升级

• 批准号: 2140416
• 负责人: Sang-Heon Shim
• 金额: $ 8.53万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-02-01 至 2023-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2140416&HistoricalAwards=false
• 关键词: Upgrade; Raman; Spectroscopy; System; Pressure

This award will fund the upgrade of the Raman spectroscopy system at the high-pressure lab of Arizona State University (ASU). The upgrade includes a CCD detector, a spectrograph, and a 3D sample positioning system. The new components will not only enhance essential function of the system, vibrational spectroscopy, but also add a new capability: 2D and 3D micro phase mapping of the samples synthesized at high pressures and high temperatures. The upgrade will therefore open new research projects for undergraduate students, graduate students, and postdoctoral researchers at ASU, promoting the progress of science. In particular, the enhanced capability of the system will allow us to offer new research projects to undergraduate students, such as mantle experimental petrology, volatiles storage in mantle minerals, and software-hardware interfacing in scientific instrument. PI Shim has offered undergraduate research program since 2003. In the program, the Raman system has played a critical role and produced scientific articles first authored by undergraduate students. The majority of the undergraduate students in the research program are from minoritized groups and the upgrade will allow the PI to continue the effort, supporting education and diversity. The goal of the project is to upgrade the Raman system at the high-pressure lab at Arizona State University for enabling diverse types of measurements for mineral physics research. Micro-beam capability combined with transparency of diamond over a wide range of electromagnetic wave makes the Raman technique suitable for studying the extremely small sample inside diamond-anvil cell under high pressure. The 2D scanning capability of the micro-Raman technique can provide phase mapping for the samples synthesized at high pressures in multi-anvil press. PI Shim has used Raman spectroscopy extensively and produced numerous scientific results over the last 24 years, such as high-pressure behaviors of lattice and OH vibrational modes in mantle silicates, modeling vibrational density of state, stability of volatile-bearing minerals, structure of amorphous phases at high pressures, high-temperature behavior of minerals, and magnetic scattering. However, the key components of the existing system, CCD detector and spectrograph, are outdated and the quality of the data suffers from their ages (18 years). The upgrade will not only improve the quality of data from the Raman system but also add a new capability to the system: accurate 2D or 3D phase mapping. The new capability will be important for supporting expanding research areas of the high-pressure group at ASU, such as hydrogen storage in the Earth’s interior, lower-mantle petrology, and synthesis of high-density target materials for laser driven shock experiments.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项将资助亚利桑那州立大学（ASU）高压实验室的拉曼光谱系统升级。升级包括CCD探测器、光谱仪和3D样品定位系统。新组件不仅将增强系统的基本功能，振动光谱，而且还增加了一个新的能力：在高压和高温下合成的样品的2D和3D微相映射。因此，升级将为ASU的本科生，研究生和博士后研究人员开设新的研究项目，促进科学的进步。特别是，该系统的增强功能将使我们能够为本科生提供新的研究项目，如地幔实验岩石学，地幔矿物中的挥发分储存，以及科学仪器中的软硬件接口。PI Shim自2003年以来提供本科研究计划。 在该计划中，拉曼系统发挥了关键作用，并产生了本科生首次撰写的科学文章。研究计划中的大多数本科生来自少数群体，升级将使PI继续努力，支持教育和多样性。 该项目的目标是升级亚利桑那州立大学高压实验室的拉曼系统，以便为矿物物理研究提供各种类型的测量。金刚石的微束能力和金刚石在宽范围电磁波上的透明性使得拉曼技术适合于在高压下研究金刚石对顶砧室中的极小样品。显微拉曼技术的二维扫描能力可以为在多砧压机中高压合成的样品提供相位图。PI Shim在过去的24年里广泛使用了拉曼光谱技术，并取得了许多科学成果，如地幔硅酸盐中晶格和OH振动模式的高压行为，振动态密度的建模，含挥发分矿物的稳定性，高压下非晶相的结构，矿物的高温行为和磁散射。然而，现有系统的关键部件，CCD探测器和光谱仪，已经过时，数据的质量受到它们年龄（18岁）的影响。此次升级不仅将提高拉曼系统的数据质量，还将为系统增加一项新功能：精确的2D或3D相位映射。新的能力将是重要的，以支持扩大研究领域的高压组在亚利桑那州立大学，如氢储存在地球内部，下地幔岩石学，合成高密度的目标材料的激光驱动冲击实验。这一奖项反映了NSF的法定使命，并已被认为是值得的支持，通过评估使用基金会的智力价值和更广泛的影响审查标准。