Development and model-based test of a SQUID-based high-resolution superconducting gravimeter (HR-1D-SG)

基于SQUID的高分辨率超导重力仪（HR-1D-SG）的开发和模型测试

• 批准号: 226443116
• 负责人: Privatdozent Dr. Thomas Jahr
• 金额: --
• 依托单位: Leibniz-Institut für Photonische Technologien (IPHT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/226443116?language=en
• 关键词: Development; model; based; test; SQUID

Common research goal of the cooperation is a SQUID based superconducting gravimeter with a higher resolution compared to state of the art instruments. The role allocation is as follows: PTB develops the sensor unit prototype especially the high precision test mass. IPHT Jena incorporates the SQUID readout circuitry, develops the SQUID sensors and adapts the SQUID electronics for the gravimeter. IGW will develop the geophysical models and tests the prototype sensor at the gravimeter facility in the Geodynamic Observatory Moxa (Thuringia). The main task of the project is the enhancement of the resolution compared to commercial acceleration sensors by a factor of 100 (resolution: 10-14 part of the Earth’s gravity), using highly sensitive low temperature superconductivity SQUID and an optimized readout circuitry. Potential of this type of sensor is to resolve very low geodynamic gravity signals to investigate the properties of the Chandler-Wobble and the Slichter-Triplet (if existent). To evaluate the resolution in comparison to the installed gravimeter high accuracy models of mass transports close to the observatory in Moxa have to be developed. If case of success of the prototype development a follow up project is necessary to develop a prototype of an instrument capable to measure gravity in three orthogonal directions, which is not possible for the current commercial instruments. This opens up a new world of data for the geophysical community.

合作的共同研究目标是基于SQUID的超导重力仪，与最先进的仪器相比，具有更高的分辨率。角色分配如下：PTB开发传感器单元原型特别是高精度测试质量。IPHT Jena整合了SQUID读出电路，开发了SQUID传感器，并为重力仪调整了SQUID电子设备。IGW将开发地球物理模型，并在Moxa地球动力学观测站（图林根州）的重力仪设施上测试原型传感器。该项目的主要任务是利用高灵敏度低温超导SQUID和优化的读出电路，将分辨率提高到商用加速度传感器的100倍（分辨率：地球重力的10-14倍）。这种类型的传感器的潜力是解析非常低的地球动力重力信号，以研究钱德勒摆动和斯利切特三重态（如果存在的话）的性质。为了与安装的重力仪进行比较来评估分辨率，必须开发靠近Moxa天文台的高精度质量传输模型。如果样机研制成功，就需要一个后续项目来研制一种能够在三个正交方向上测量重力的仪器样机，这对于目前的商用仪器来说是不可能的。这为地球物理学界开辟了一个新的数据世界。