Acquisition of a High Resolution Small Bore 3-Component DC SQUID Magnetometer for Paleomagnetic Research

0619467Tarduno这项重大研究仪器(MRI)计划拨款支持为罗切斯特大学古磁学实验室购买高分辨率小口径三分量DC SQUID磁力仪。即将获得的超导岩石磁强计(SRM)是一种新的设计，它利用脉冲管制冷机技术，不需要液体氦来达到回旋温度。小样品通道孔(6毫米)比现有系统小得多，包括罗切斯特现有的超导岩石磁强计(SRM)。预计新的SRM的灵敏度将提高五倍。新的SRM将支持对地球上最早的磁场的研究，这些磁场记录在难熔硅酸盐矿物的单晶中，这些矿物可能逃脱了原始结晶过程中获得的磁性特征的变质重置。这将有助于研究地磁场反转频率与场强、形态和长期变化之间的关系。由新的SRM推动的研究将引起对早期地球和内核发展感兴趣的广泛科学家的兴趣，以及那些参与行星发电机的数值模拟和实验模拟的科学家的兴趣。这项工作还将对科学基础设施和古地磁技术做出贡献。新的小口径SRM将向国内和国际外部游客开放，并将在罗切斯特大学的教育中发挥核心作用。***

0619467TardunoThis Major Research Instrumentation (MRI) Program grant supports acquisition of a high resolution small bore 3-component DC SQUID Magnetometer for the Paleomagnetics Lab at the University of Rochester. The superconducting rock magnetocmeter (SRM) to be acquired is a new design that utilizes a pulse tube cryocooler technology and does not require liquid Helium for the attainment of cyrogenic temperatures. The small sample access bore (6 mm) is much smaller than that of existing systems, including the existing superconducting rock magnetometer (SRM) at Rochester. The new SRM is expected to have a factor of five greater sensitivity. The new SRM will support research on the Earth's earliest magnetic field as recorded in single crystals of refractory silicate minerals that have possibly escaped metamorphic resetting of their magnetic signatures acquired during original crystallization. Studies of the relationships between geomagnetic field reversal frequency and field strength, morphology, and secular variation will be facilitated. Research facilitated by the new SRM would be of interest to a broad range of scientists interested in the development of the early Earth and inner core, and those involved in numerical and experimental simulations of planetary dynamos. The work will also contribute to scientific infrastructure, and paleomagnetic techniques. The new small bore SRM will be open to national and international external visitors and will play a central role in education at the University of Rochester. ***