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

磁感应线圈阵列（云母）是NSF支持的感应线圈磁强计阵列，用于测量超低频（ULF）波。云母将增进我们对空间天气的了解，特别是在辐射带中导致电子沉淀到电离层的能量交换方面。该项目将包括维护格陵兰现有的磁力计和增加一个新的系统。这些数据将通过NSF SuperMAG数据库向科学界公开。此外，将支持早期职业科学家，包括研究生和本科生。这些数据将被纳入由NJIT REU计划支持的本科项目。该项目支持（1）超低频感应线圈磁力仪系统的操作和升级，包括超低频数据的获取和处理，（2）向科学界提供这些数据，以及（3）使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dB/dt，它们在1 Hz附近具有比磁通门磁力计更好的固有信噪比，因此能够观察到这些频率附近的相对较弱的波。将被解决的科学主题通常集中在电磁离子回旋（EMIC）波，已知驱动辐射带粒子沉淀，和Pi 1B波，与亚暴爆发。该奖项旨在理解1）EMIC波的半球间观测，2）亚暴注入和IPDP波，3）Pi 1B脉动源的调查，4）全球范围内的EMIC波发生和降水。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估而被认为值得支持。

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.