Collaborative Research: Studies of ULF Waves and Support for the Magnetic Induction Coil Array (MICA)

合作研究：超低频波研究和磁感应线圈阵列 (MICA) 支持

• 批准号: 2133837
• 负责人: Hyomin Kim
• 金额: $ 84.87万
• 依托单位: New Jersey Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2133837&HistoricalAwards=false
• 关键词: Collaborative; Research; Studies; ULF; Waves

The Magnetic Induction Coil Array (MICA) is an NSF supported array of induction coil magnetometers that measure ultra-low frequency (ULF) waves. MICA will increase our understanding of space weather, in particular with regards to exchange of energy in the radiation belts that leads to electrons precipitating into the ionosphere. The project will include maintenance of existing magnetometers and the addition of a new system in Greenland. The data will be made public to the scientific community through the NSF SuperMAG database. Additionally, early career scientists will be supported including graduate and undergraduate students. The data will be incorporated into undergraduate projects supported by the NJIT REU program. This project provides support for (1) the operation and upgrades of ULF induction coil magnetometer systems, including the acquisition and processing of ULF data, (2) the provision of these data to the scientific community, and (3) specific scientific studies using these data. Since induction coil magnetometers measure dB/dt, they have intrinsically better signal-to-noise ratios near 1 Hz than fluxgate magnetometers and so are able to observe even relatively weak waves near these frequencies. The science topics that will be addressed are generally focused on electromagnetic ion cyclotron (EMIC) waves, known to drive radiation belt particle precipitation, and Pi1B waves, associated with substorm onsets. The work will target understanding of 1) interhemispheric observations of EMIC waves, 2) substorm injections and IPDP waves, 3) investigations of the source of Pi1B pulsations, and 4) EMIC wave occurrences and precipitation on global scales.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

磁性感应线圈阵列（MICA）是一组NSF支持的感应线圈磁力计，可测量超低频率（ULF）波。云母将增加我们对太空天气的理解，特别是在辐射带交换的辐射带方面，从而导致电子引入电离层。该项目将包括维护现有磁力计以及在格陵兰岛增加新系统。数据将通过NSF Supermag数据库公开向科学界公开。此外，将支持早期职业科学家，包括研究生和本科生。数据将纳入由NJIT REU计划支持的本科项目。该项目为（1）ULF感应线圈磁力计的操作和升级提供了支持，包括对ULF数据的获取和处理，（2）将这些数据提供给科学界，以及（3）使用这些数据的特定科学研究数据。由于感应线圈磁力计测量db/dt，因此它们在1 Hz接近1 Hz的信噪比上比Fluxgate磁力计非常好，因此能够在这些频率附近观察到相对较弱的波。将要解决的科学主题通常集中在电磁离子回旋子（EMIC）波上，已知会驱动辐射带颗粒降水，而PI1B波则与实量相关的PI1B波。这项工作将针对1）EMIC波的半球间观测，2）替代注射和IPDP波，3）研究PI1B脉动来源的研究以及4）emic波的发生和全球尺度上的降水。这反映了NSF的法定任务并被认为是通过基金会的知识分子优点和更广泛的影响审查标准来评估值得支持的。