Acquisition of a high-field variable-temperature SQUID magnetometer

购置高场变温 SQUID 磁力计

• 批准号: 1954973
• 负责人: Bruce Moskowitz
• 金额: $ 43.62万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-03-15 至 2022-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1954973&HistoricalAwards=false
• 关键词: Acquisition; field; variable; temperature; SQUID

This Division of Earth Sciences Instrumentation and Facilities Program grant supports acquisition of a high field, variable temperature Magnetic Properties Measurement System that will be housed within the Institute for Rock Magnetism (IRM) at the University of Minnesota. The instrument will support studies of the magnetic properties and behavior of geologic materials over a wide range of temperatures and in variable applied fields with application to study of plate tectonics and reconstructing Earth’s pre-historic climate and environmental conditions. The instrumentation will support hands-on student training in methods of natural material magnetic analysis and have broad impact for U.S. academic research in rock and paleomagnetism given its incorporation within an existing NSF supported community facility.The magnetic properties and behavior of geologic materials at low temperatures and in variable applied fields are of fundamental importance in rock magnetism and paleomagnetism: they offer unique insights into the carriers and origins of natural remanence, and thus into important related geophysical phenomena ranging from core evolution to lithospheric dynamics. Acquisition of a highly sensitive superconducting quantum interference device based magnetometer in which samples can be subjected to high magnetic field (up to 7-Tesla) and a wide range of temperatures (from 1.8 to 1000 K) will add a new capability at the University of Minnesota Institute for Rock Magnetism. Given broad geoscience community access to the instrument through the IRM, a range of fundamental Earth materials research will be supported including studies of the fundamental physical behavior of magnetic minerals that provides information on the mixtures of magnetic minerals and distributions of particle sizes in natural bulk samples with applications in paleoenvironmental research and in characterization of paleomagnetic remanence carriers. Research on deep Earth processes, lithospheric dynamics, iron cycling in the environment, biogeomagnetism and planetary science will benefit from this acquisition.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.

地球科学部仪器和设施项目拨款支持购置高场可变温度磁性测量系统，该系统将安置在明尼苏达大学岩石磁学研究所（IRM）内。该仪器将支持在大范围温度和可变应用领域研究地质材料的磁性和行为，并应用于研究板块构造和重建地球的史前气候和环境条件。该仪器将支持学生在自然材料磁性分析方法方面的实践培训，并对美国岩石和古磁学的学术研究产生广泛影响，因为它与现有的国家科学基金会支持的社区设施相结合。地质材料在低温和可变应用领域中的磁性和行为在岩石磁学和古磁学中具有重要意义：它们为研究自然剩余物的载体和起源提供了独特的见解，从而为研究从岩心演化到岩石圈动力学等重要的相关地球物理现象提供了独特的见解。获得一个高灵敏度超导量子干涉装置的磁力计，样品可以承受高磁场（高达7特斯拉）和宽温度范围（从1.8到1000 K），这将为明尼苏达大学岩石磁学研究所增加一项新的能力。由于广泛的地球科学团体可以通过IRM使用该仪器，将支持一系列基础地球材料研究，包括磁性矿物的基本物理行为研究，提供有关磁性矿物混合物和天然散装样品中粒径分布的信息，并应用于古环境研究和古剩磁载体的表征。对地球深部过程、岩石圈动力学、环境中的铁循环、生物地磁和行星科学的研究将受益于此次收购。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。