Collaborative Research: Development of an Ultra High Resolution Scanning SQUID Microscope for Paleomagnetic and Rock Magnetic Studies

合作研究：开发用于古地磁和岩石磁学研究的超高分辨率扫描 SQUID 显微镜

• 批准号: 0004069
• 负责人: Joseph Kirschvink
• 金额: $ 2.34万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-03-15 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0004069&HistoricalAwards=false
• 关键词: Collaborative; Research; Development; Ultra; Resolution

0004069KirschvinkThis award supports a collaborative research Project between Caltech (EAR-0004069) and Vanderbilt University to develop an Ultra High Resolution Scanning Superconducting Quantum Interference Device (SQUID) Microscope (UHRSSM) for Paleomagnetic and Rock Studies. The instrument will be based on a small superconducting pickup coil coupled to a SQUID sensor housed in the vacuum space of a cyrostat, suspended behind a thin sapphire window less than 50mm above a room temperature sample. Scanning the sample allows us to map the z-component of the magnetic field above the sample with spatial resolutions as small as 100mm (limited mainly by the pickup coil diameter). The close spacing between sample and pickup coil results in an increase in sensitivity by four orders of magnitude compared to commercial SQUID moment magnetometers. The new instruments will allow for new classes of paleomagnetic analyses: (1) Conglomerate, baked contact, and fold tests on extremely small spatial scales, vastly expanding the utility of of these critical geological field tests of magnetic stability, (2) a suite of rock-magnetic and paleomagnetic experiments on standard petrographic thin sections, allowing the observed magnetic components to be matched with the minerals that are present, (3) Thellier-Thellier paleointensity analyses on individual mineral grains and at very high rates, (4) high resolution magnetic stratigraphy, and (5) spatial correlation of rock magnetic data with SEM, microprobe and other data on thin sections, at submillimeter scales.***

0004069 Kirschvink该奖项支持加州理工学院（ESTA-0004069）和范德比尔特大学之间的合作研究项目，开发一个超高分辨率扫描超导量子干涉仪（SQUID）显微镜（UHRSSM）的古地磁和岩石研究。 该仪器将基于一个小型超导拾波线圈，该线圈耦合到一个SQUID传感器，该传感器位于低温恒温器的真空空间中，悬挂在一个薄蓝宝石窗口后面，距离室温样品不到50 mm。 扫描样品使我们能够以小至100 mm的空间分辨率（主要受拾波线圈直径的限制）绘制样品上方磁场的z分量。 样品和拾波线圈之间的紧密间隔导致灵敏度比商用SQUID矩磁力计增加四个数量级。新仪器将允许新类别的古地磁分析：（1）在极小的空间尺度上进行砾岩、烘烤接触和褶皱测试，极大地扩展了这些关键地质场磁稳定性测试的实用性，（2）在标准岩相薄切片上进行一系列岩石磁性和古磁性实验，使观察到的磁性成分与存在的矿物相匹配，（3）对单个矿物颗粒进行Thellier-Thellier古强度分析，并以非常高的速率进行分析;（4）高分辨率磁性地层学;（5）岩石磁性数据与扫描电镜、微探针和其他亚毫米尺度薄片数据的空间相关性。