MRI: Development of an Airborne Coronal Emission Surveyor (ACES)

机载日冕发射测量仪（ACES）将被开发为一种新的成像傅立叶变换光谱仪，用于在2024年北美日全食期间从美国国家科学基金会湾流五号上观测日冕。ACES将观测1-4微米波长区域，以了解大太阳半径下的日冕磁场和日冕等离子体。此外，该项目还将吸引本科生参与研究。该团队还将在2024年日全食期间开展英西双语外展活动。ACES是由机载红外实验稳定平台（ASPIRE）提供的一种新型焦平面仪器。ACES将在一个新的波长区域调查日冕，作为太阳条件和半径的函数，扩展该团队成功的中红外日冕计划。它将观察中性氦以及18条被禁止的电离镁、硅、硫、氩、钙和铁的谱线，并将寻找较弱的谱线作为进一步的诊断。一半的ace日冕线以前没有被观测到过。这些测量将有助于改进太阳日冕的原子物理模型。ACES将提供前所未有的内日冕和中日冕红外等离子体诊断。日冕线覆盖了0.4 ~ 3.2 MK的温度范围，包括4对不同温度下的密度敏感线。ACES还将对连续体进行精确测量，允许测量高fip（硫和氩）与低fip元素的日冕丰度。该奖项反映了美国国家科学基金会的法定使命，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，被认为值得支持。

The Airborne Coronal Emission Surveyor (ACES) will be developed as a new imaging Fourier transform spectrometer to observe the solar corona from the NSF Gulfstream V during the 2024 total solar eclipse across North America. ACES will observe the 1-4 micron wavelength region to understand the coronal magnetic field and coronal plasma at large solar radii. Additionally, the project will engage undergraduate students in research. The team will also conduct English-Spanish bilingual outreach events in conjunction with the 2024 total solar eclipse.ACES is a new focal plane instrument enabled by the Airborne Stabilized Platform for InfraRed Experiments (ASPIRE). ACES will survey the corona in a new wavelength region as a function of solar conditions and radius, expanding the team’s successful mid-infrared coronal program. It will observe neutral helium as well as 18 forbidden lines of ionized magnesium, silicon, sulfur, argon, calcium, and iron, and will search for weaker lines as further diagnostics. Half of the ACES coronal lines have not been observed before. These measurements will allow for improved atomic physics modeling of the solar corona. ACES will provide unprecedented infrared plasma diagnostics in the inner and mid-corona. The coronal lines cover a temperature range of 0.4 to 3.2 MK, including four density-sensitive line pairs at different temperatures. ACES will also make a precise measurement of the continuum, allowing for measurement of coronal abundance of high-FIP (sulfur and argon) vs. low FIP-elements.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.