(science collaborator)
| Email: | sangyun.lee@nasa.gov |
| Org Code: | 673 |
| Address: |
NASA/GSFC Mail Code 673 Greenbelt, MD 20771 |
| Employer: | CATHOLIC UNIV OF AMERICA |
Earth's exosphere is composed primarily of light gases, such as atomic hydrogen. The density of the exosphere and its variability are influenced by solar and geomagnetic activity. Atomic hydrogen plays a critical role in plasma dynamics within Earth's magnetosphere through charge exchange interactions with ions, leading to the production of energetic neutral atoms (ENA) and soft X-ray emissions.
Whistler-mode chorus waves, generated by electron temperature anisotropy, play a significant role in the acceleration of electrons in the outer radiation belt and in auroral precipitation within Earth's magnetosphere. Langmuir waves, upper hybrid mode waves, and whistler waves are excited by unstable electron velocity distributions, such as parallel beams, ring beams, and anisotropic distributions. These waves are key contributors to type II and III solar radio bursts through maser instability mechanisms. Particle-In-Cell (PIC) simulation code is used for this research.
NASA/GSFC & CUA - Greenbelt, Maryland
November 2023 - Present
Research in Earth's exosphere developing a dynamic model (MATE) working with Dr. Hyunju Connor
West Virginia University - Morgantown, West Virginia
February 2020 - October 2023
Research in electron outer radiation belts using DREAM3D code working with Prof. Weichao Tu
SaTReC, KAIST - Daejeon, South Korea
March 2019 - December 2019
Ph. D. in School of Space Research, 2019, Kyung Hee University, Korea
M.S. in School of Space Research, 2014, Kyung Hee University, Korea
B.S. in Applied Physics, 2012, Kyung Hee University, Korea
B.S. in Astronomy and Space Science, 2012, Kyung Hee University, Korea