Upgrade of Superconducting Rock Magnetometer

超导岩石磁力计升级改造

• 批准号: 0004064
• 负责人: Gautam Sen
• 金额: $ 6.5万
• 依托单位: Florida International University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2003-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0004064&HistoricalAwards=false
• 关键词: Upgrade; Superconducting; Rock; Magnetometer

0004064SenThis grant provides partial support for the costs of upgrading the superconducting rock magnetometer (SRM) at Florida International University with direct current (DC) superconducting quantum interference devices (SQUIDs), replacing the cold head and cryocooler compressor, and modifying the helium dewar. The PI has documented that the current SRM at FIU (11 years old) is fraught with problems including, rapid He boil off, frequent ice blocks in the He plumbing lines and a non-functional y-axis radio frequency (Rf) SQUID leaving only two components of the magnetic field measurable with the aging machine. DC SQUIDs offer over an order of magnitude increase in measurement sensitivity over Rf SQUIDs and are now the de facto standard sensors used in state-of-the-art SRMs by leading paleomagnetists. The addition of a new He dewar and cryocooler compressor will also, increase available analysis time on this instrument between fills, decrease the operational costs of the instrument, and increase the useful life of the instrument by reducing the number of thermal cycles required per operating hour. The upgraded magnetometer will allow for continued studies of paleomagnetic field behavior near polarity transitions and will be used to train a racially diverse crop of undergraduate and M.S. students in paleomagnetic research methods.***

0004064Sen这笔赠款为佛罗里达国际大学超导岩石磁力计（SRM）升级使用直流（DC）超导量子干涉装置（SQUID）、更换冷头和低温冷却器压缩机以及改造氦杜瓦瓶的费用提供部分支持。 PI 记录了 FIU 的当前 SRM（已有 11 年历史）充满了问题，包括 He 快速蒸发、He 管道中频繁出现冰块以及无法正常工作的 y 轴射频 (Rf) SQUID 仅留下可使用老化机测量磁场的两个分量。 DC SQUID 的测量灵敏度比 Rf SQUID 提高了一个数量级，现在已成为领先的古地磁学家在最先进的 SRM 中使用的事实上的标准传感器。 添加新的氦杜瓦瓶和低温冷却压缩机还将增加该仪器在填充之间的可用分析时间，降低仪器的运营成本，并通过减少每个操作小时所需的热循环次数来延长仪器的使用寿命。升级后的磁力计将允许继续研究极性转变附近的古磁场行为，并将用于培训不同种族的本科生和硕士学位。古地磁研究方法的学生。***