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.

磁感应线圈阵列(MICA)是一种由NSF支持的感应线圈磁强计阵列，用于测量超低频(ULF)波。云母将增加我们对空间天气的了解，特别是关于导致电子沉淀到电离层的辐射带中的能量交换。该项目将包括维护现有的磁力仪，并在格陵兰岛增加一个新系统。这些数据将通过NSF SuperMAG数据库向科学界公开。此外，包括研究生和本科生在内的早期职业科学家将得到支持。这些数据将被纳入NJIT REU计划支持的本科生项目中。该项目为(1)超低频感应线圈磁强计系统的运行和升级提供支持，包括获取和处理超低频数据，(2)向科学界提供这些数据，以及(3)利用这些数据进行具体的科学研究。由于感应线圈磁力计测量的是分贝/分贝，因此它们在1赫兹附近的信噪比比磁通门磁力计好，因此即使在这些频率附近也能观察到相对较弱的波。将讨论的科学主题一般集中在电磁离子回旋(EMIC)波和Pi1B波上，EMIC波是已知的驱动辐射带粒子沉淀的波，Pi1B波与亚暴开始有关。这项工作的目标将是理解1)EMIC波的半球间观测，2)亚风暴注入和IPDP波，3)Pi1B脉动源的调查，以及4)全球范围内EMIC波的发生和降水。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。