Development of a Borehole Optical Fiber Strainmeter

这项提案寻求资金，以开发一种使用光纤方法的井下垂直应变传感器。建议的传感器将通过仅在井下部署光学组件来增加稳健性。将电子元件保持在沉淀物-水或高于地面的水平。此外，光纤将部署在井筒外。应变仪将部署在皮尼翁平坦天文台(PFO)，以便与现有的应变测量仪器包进行比较。这一发展的一个目标是扩大有用的测量频率范围。应变是理解地壳表层基本构造过程的一个组成部分。将使用PFO的现有钻孔，并将数据与现有传感器的水平应变量进行比较和验证。干涉仪处理系统已经研制成功。寻求两个主要的智力目标：1)改进和评估原型仪器的设计和性能，2)通过现有的模型彻底检验垂直应变和水平应变可以相关的假设。管理计划规定，主管人员和另外两名专业人员职等人员每年可获得0.5个月的薪金支助。两名开发技术人员和一名研究生每年将获得3个月的工资和学杂费支持。一名研究项目助理每年将获得一个月的工资支持。剩余资金用于支付用品和仪器购置以及一般后勤费用。该项目将支持一名研究生，其成果将直接影响大地测量领域，并在自然灾害监测方面具有社会意义。

0827201ZumbergeThis proposal seeks funding to develop a down-hole vertical strain sensor using an optical fiber approach. The proposed sensor will increase robustness by deploying only optical components down-bore ? keeping electronic components at the sediment-water or above-ground level. Additionally, the fiber will be deployed outside the borehole casing. The strainmeter will be deployed at the Piñon Flat Observatory (PFO) to compare data with existing strain-measuring instrument packages. A goal of this development is to extend the useful measurement frequency range. Strain is an integral part of understanding fundamental tectonic processes in the surface crust. An existing borehole at PFO will be used and data will be compared and validated against horizontal strain volume from existing sensors. The interferometric processing system has already been developed. Two main intellectual goals are sought: 1) to improve and evaluate the prototype instrument design and performance, and 2) to thoroughly test the assumption vertical strain can be related to horizontal strain through existing models. The management plan has the PIs and two other PI-level personnel receiving 0.5 month per year salary support. Two development techs and a graduate student will receive 3 month per year salary and tuition/fee support. A research project assistant will receive one month per year salary support. The remaining funds support supply and instrumentation acquisition and general logistical costs. The project will support a graduate student and results will directly impact the field of geodesy and has societal relevance in natural hazard monitoring.***