Local Generation of High‐Frequency Plasmaspheric Hiss Observed by Van Allen Probes
Abstract
The generation of a high‐frequency plasmaspheric hiss (HFPH) wave observed by Van Allen Probes is studied in this letter for the first time. The wave has a moderate power spectral density (∼10−6 nT2/Hz), with a frequency range extended from 2 to 10 kHz. The correlated observations of waves and particles indicate that HFPH is associated with the enhancement of electron flux during the substorm on 6 January 2014. Calculations of the wave linear growth rate driven by the fitted electron phase space density show that the electron distribution after the substorm onset is efficient for the HFPH generation. The energy of the contributing electrons is about 1–2 keV, which is consistent with the observation. These results support that the observed HFPH is likely to be generated locally inside the plasmasphere due to the instability of injected kiloelectron volt electrons.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 07, 2019
- Source ID
- 10.1029/2018gl081578
Entities
People
- Hui Zhu
- Lunjin Chen
- Si Liu
- Xu Liu
- Yong Cao
- Zhaoguo He
- Zhonglei Gao
Organizations
- Air Force Office of Scientific Research
- Changsha University of Science and Technology
- Chinese Academy of Sciences
- Harbin Institute of Technology
- National Natural Science Foundation of China
- National Science Foundation
- Sun Yat-sen University
- University of Texas at Dallas