SGER: Field-Test of a Prototype Giant Magneto-Impedance (GMI) Magnetometer

这将建立和现场测试一种新型的3轴矢量磁强计的原型，用于地球物理研究。这种新型磁力计是基于巨磁阻抗（GMI）效应。GMI磁力计现在广泛应用于制造业，汽车工业，甚至手机，但它们还没有适应地球物理研究的需要。基于GMI效应的磁强计的优点是，它可以做得比目前的磁通门磁强计小得多，并且使用更少的功率来运行。此外，基于gmi的磁强计的制造成本可能比精密磁通门磁强计低得多。采用一种廉价、可重复、低功率的替代标准磁通门磁强计的方法，将为建立密集的全球科学磁强计网络铺平道路，从而大大提高研究磁层现象的地面传感器的科学效率。该项目将在将GMI技术用于地球物理研究方面迈出关键的第一步。该项目的范围包括：(1)为原型装置建造合适的外壳和平台，(2)开发基本数据采集软件，(3)在极光区与现有的磁通门磁强计一起对仪器进行现场测试，以及(4)减少数据，以便对GMI技术用于地面磁层现象调查的适用性进行比较评估。GMI传感器是由波士顿大学和MTI有限公司（Mystic， CT）合作开发的用于深海应用的传感器改编而成的。传感器的现场测试将在阿拉斯加的费尔班克斯进行，在那里可以与扑克平面磁力计进行比较，后者是地球物理研究所磁力计阵列的一部分，以及辅助的无线电和光学诊断，包括与先进模块化非相干散射雷达（AMISR）设施相关的设备。

This will build and field-test of prototype of a new class of 3-axis vector magnetometers for geophysical research. This new class of magnetometers is based on the giant magneto-impedance (GMI) effect. GMI magnetometers are now prevalent in manufacturing applications, the automotive industry, and even cell phones but they have not been adapted to the needs of geophysical research. The advantage of a magnetometer based on the GMI effect is that it can be made much smaller than current fluxgate magnetometers and would use much less power to operate. In addition, it is likely that GMI-based magnetometers could be manufactured at a much smaller cost than precision fluxgate magnetometers. The introduction of a cheap, reproducible, low-power alternative to standard fluxgate magnetometers will pave the way for a dense global network of scientific magnetometers, enabling a major improvement in the scientific efficacy of ground-based sensors for the study of magnetospheric phenomena. This project will take a first critical step in adapting GMI technology for geophysical research. The scope of the project includes (1) building a suitable housing and platform for a prototype device, (2) developing basic data acquisition software, (3) field-testing the instrument in the auroral zone alongside an existing fluxgate magnetometer, and (4) reducing the data in order to perform a comparative evaluation of the suitability of GMI technology for ground-based investigations of magnetospheric phenomena. The GMI sensor is adapted from a sensor developed for deep sea applications under a collaborative effort between Boston University and MTI Limited (Mystic, CT). The field-test of the sensor will take place in Fairbanks, Alaska, where comparisons can be made with the Poker Flat magnetometer, which is part of the Geophysical Institute Magnetometer Array, as well as ancillary radio and optical diagnostics, including those associated with the Advanced Modular Incoherent Scatter Radar (AMISR) facility.