Collaborative Research: Development of a High Resolution Vector Scanning SQUID Microscope for Paleomagnetism

0549521 BaudenbacherThis collaborative grant（together with PIT-0549600; PI韦斯）支持矢量扫描超导量子干涉器件（SQUID）显微镜（VSSM）的开发。 VSSM将测量磁场的所有三个分量，具有更高的空间分辨率和更大的易用性，而不是使用以前开发的单分量超高分辨率扫描SQUID显微镜（UHRSSM），该显微镜位于Joe Kirschvink的古地磁实验室Caltech。 UHRSSM主要是由Franz Baudenbacher在先前的研究中心/IF支持下开发的（见附件-0004101）。 UHRSSM已被证明可以测量室温样品表面上方磁场的垂直分量，其力矩灵敏度优于10-15 Am 2（比商用超导岩石磁力计灵敏三个数量级），空间分辨率为亚毫米。 VSSM将支持对剩磁太弱而无法通过标准岩石磁力计技术测量的样品进行研究，或支持对剩磁分量的高空间分辨率（亚毫米至微米）进行研究，这些空间分辨率可能会对获得磁场时的古环境条件产生新的见解，或支持样本量极其有限的研究。 例子包括行星材料的古地磁调查和地球Hadean锆石的研究，可能揭示磁场演化的时间，超高分辨率磁性地层学，以及从细粒材料中阐明单个磁性矿物载体。 开发涉及地球科学家/行星科学家（韦斯）和物理学家（鲍登巴赫）和私营部门合作伙伴之间的合作，他们将制造将在新的VSSM上使用的微型（120 μ m平方）SQUID传感器。 新的VSSM技术将移植到西海岸（加州理工学院）和东海岸（麻省理工学院）地球科学系现有的UHRSSM仪器上，PI打算向外部用户提供这些仪器。 ***

0549521BaudenbacherThis collaborative grant (together with EAR-0549600; PI WEiss) supports development of a Vector Scanning Superconducting Quantum Interference Device (SQUID) Microscope (VSSM). The VSSM will measure all three components of the magnetic field with higher spatial resolution and far greater ease of use than now achieved using a previously developed single component Ultra High Resolution Scanning SQUID Microscope (UHRSSM) that is housed in Joe Kirschvink's paleomagnetism laboratory Caltech. The UHRSSM was developed primarily by Franz Baudenbacher under previous EAR/IF support (EAR-0004101). The UHRSSM has been shown to measure the vertical component of the magnetic field above the surface of a room-temperature sample with a moment sensitivity of better than 10-15 Am2 (three orders of magnitude more sensitive than commercially available superconducting rock magnetometers) with sub millimeter spatial resolution. The VSSM would support research on samples where the magnetic remanence is too weak to be measured via standard rock magnetometer techniques or for studies in which high (sub-mm to micron) spatial resolution of the magnetic remanence components may yield new insights into the paleoenvironmental conditions at the time the field was acquired or for which sample size is extremely limited. Examples include paleomagnetic investigations of planetary materials and studies of terrestrial Hadean zircons that may shed light on the timing of magnetic field evolution, ultra-high resolution magnetostratigraphy, and elucidation of individual magnetic mineral carriers from fine grained materials. The development involves collaboration between a geoscientist/planetary scientist (Weiss) and a physicist (Baudenbacher) and private sector partners who will fabricate the tiny (120 mu m square) SQUID sensors that will be employed on the new VSSM. The new VSSM technology will be ported to existing UHRSSM instruments in geoscience departments on the west (Caltech) and east (MIT) coasts and the PIs intend to make the instruments available to outside users. ***