Wed, 02/08/2017 - 3:00pm to 4:00pm
Morse 301
Space Science Seminar
Dr. Jichun Zhang, UNH

EMIC waves and associated plasma conditions

Abstract:  Electromagnetic ion cyclotron (EMIC) waves play an important role in the overall dynamics of the Earth’s magnetosphere. Particularly, these waves contribute to the energization and loss of magnetospheric particles. For instance, EMIC waves can interact with relativistic electrons in the radiation belts as well as energetic ions in the ring current, resulting in rapid scattering loss. In this talk, I will discuss the generation and propagation of EMIC waves and three crucial EMIC wave-associated plasma conditions: 1) hot anisotropic H+, which is the free energy provider of EMIC waves and serves as a necessary condition for the EMIC wave growth, 2) ion heating, which indicates the effect of the EMIC waves, and 3) cold dense plasma, which plays a catalytic role in the wave generation and affects the wave properties. Outstanding problems about EMIC waves and unprecedented opportunities to solve them with multi-point measurements from satellites and CubeSats will also be presented.