Magnetotellurics with SQUIDs

SQUID 大地电磁学

• 批准号: ST/L001934/1
• 负责人: Samuel Henry
• 金额: $ 10.97万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2014
• 资助国家: 英国
• 起止时间: 2014 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FL001934%2F1
• 关键词: Magnetotellurics; SQUIDs

Methods to map the geological structure of the ground underneath our feet have long been of significant interest both to earth scientists, and to industry, with obvious importance to mining, oil and gas exploration, groundwater extraction, pollution monitoring and other activities.Geophysical exploration techniques are a way to survey underground, without the expense of digging boreholes. Seismic sounding - measuring reflections of acoustic waves from controlled explosions - offers a powerful, but expensive, way to carry out a one shot survey. Techniques such as ground penetrating radar allow us to probe the ground at far lower cost with an electromagnetic signal, but the depth to which they can reach is limited by this probe signal. Magnetotellurics (MT) is a technique which uses the natural fluctuations in the geomagnetic field as a probe signal. By taking precision measurements of these signals at multiple sites on the surface we can probe to depths of several kilometres. But as these signals are very weak, it requires sensitive magnetic sensors and sophisticated noise rejection.We have developed such a system, based on SQUIDs (Superconducting Quantum Interference Devices) for the cryoEDM experiment - a particle physics project aiming to measure the neutron electric dipole moment, and thus study the origin of the matter-antimatter asymmetry of the Universe. We believe the innovative hardware and software we have developed could make SQUIDs a suitable alternative to existing sensors used in MT, and thus improve the resolution and depth which can be reached.This project aims to investigate this idea further. We will carry out a combination of computer modelling and measurements of the magnetic noise at typical field sites, in order to calculate the resolution which could be reached using our system and the potential improvement on existing techniques. In addition we will investigate the many possible applications of this technology to determine the specific needs (resolution, depth, working environment), and the size of the potential market. Thus we aim to identify which areas are the most promising for this instrumentation. We will then develop our design further.At the present moment we can see many possible applications of SQUIDs in magnetotellurics, but we do not have answers to the questions that potential investors would like to know, such as: what is the potential improvement in resolution to which we can map the electrical conductivity at different depths? How susceptible is the technique to magnetic noise? Can it operate in a noisy industrial environment? This project will allow us to answer these questions. It will help identify the most promising potential market, and thus provide a step to the next stage in the commercialisation of this technology.At the end of this programme, we will have the technical data to allow ISIS Innovation to protect the relevant IP and promote this idea to potential industrial partners.

地球物理勘探技术是一种在地下进行勘测的方法，它不需要花费大量的钻孔费用，也不需要花费大量的人力物力。地球物理勘探技术是一种在地下进行勘测的方法，它的主要目的是为了测量地下的地质结构，而不需要花费大量的人力物力。地震探测--测量受控爆炸产生的声波反射--提供了一种强大但昂贵的方法来进行一次测量。诸如探地雷达等技术使我们能够以低得多的成本用电磁信号探测地面，但它们可以到达的深度受到这种探测信号的限制。大地电磁学（MT）是一种利用地磁场的自然波动作为探测信号的技术。通过在地表的多个地点对这些信号进行精确测量，我们可以探测到几公里的深度。但是由于这些信号非常微弱，需要灵敏的磁传感器和复杂的噪声抑制。我们已经开发了这样一个系统，基于SQUID（超导量子干涉器件）的cryoEDM实验-一个粒子物理项目，旨在测量中子电偶极矩，从而研究宇宙的物质-反物质不对称性的起源。我们相信我们开发的创新硬件和软件可以使SQUID成为MT中现有传感器的合适替代品，从而提高分辨率和深度。本项目旨在进一步研究这一想法。我们将在典型的现场进行计算机建模和磁噪声测量相结合，以计算使用我们的系统可以达到的分辨率和对现有技术的潜在改进。此外，我们还将研究这项技术的许多可能应用，以确定具体需求（分辨率、深度、工作环境）和潜在市场的规模。因此，我们的目标是确定哪些领域是最有前途的这种仪器。我们将进一步发展我们的设计。目前，我们可以看到SQUID在大地电磁学中的许多可能的应用，但我们没有答案的问题，潜在的投资者想知道，如：什么是潜在的改进，我们可以映射在不同深度的电导率的分辨率？这种技术对磁噪声的敏感程度如何？它能在嘈杂的工业环境中工作吗？这个项目将使我们能够回答这些问题。这将有助于确定最有前途的潜在市场，从而为该技术的下一阶段商业化提供一个步骤。在该计划结束时，我们将获得技术数据，使ISIS创新能够保护相关知识产权，并将这一想法推广给潜在的工业合作伙伴。

项目成果

Simultaneous geomagnetic monitoring with multiple SQUIDs and fluxgate sensors across underground laboratories

• DOI: 10.1051/e3sconf/20161202003
• 发表时间: 2016
• 作者: S. Henry;E. P. D. Borgo;C. Danquigny;B. Abi

Exploring gravity with the MIGA large scale atom interferometer.

• DOI: 10.1038/s41598-018-32165-z
• 发表时间: 2018-09-14
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Canuel B;Bertoldi A;Amand L;Pozzo di Borgo E;Chantrait T;Danquigny C;Dovale Álvarez M;Fang B;Freise A;Geiger R;Gillot J;Henry S;Hinderer J;Holleville D;Junca J;Lefèvre G;Merzougui M;Mielec N;Monfret T;Pelisson S;Prevedelli M;Reynaud S;Riou I;Rogister Y;Rosat S;Cormier E;Landragin A;Chaibi W;Gaffet S;Bouyer P
• 通讯作者: Bouyer P