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Quasi Thermal Noise Spectroscopy for Van Allen Probes
Quasi thermal fluctuations in the Langmuir/upper-hybrid frequency range are pervasively observed in space plasmas including the radiation belt and the ring current region of inner magnetosphere as well as the solar wind. The quasi thermal noise spectroscopy may be employed in order to determine the electron density and temperature as well as to diagnose the properties of energetic electrons when direct measurements are not available. However, when employing the technique, one must carefully take the spacecraft orientation ...
Yoon, Peter; Hwang, Junga; Kim, Hyangpyo; Seough, Jungjoon;
Published by: Journal of Geophysical Research: Space Physics Published on: 04/2019
YEAR: 2019   DOI: 10.1029/2019JA026460
(n + 1/2)fce; antenna geometry; parker solar probe; quasi-thermal; radiation belt; Solar Probe Plus; upper hybrid; Van Allen Probes
Electromagnetic Thermal Noise in Upper-Hybrid Frequency Range
The inner magnetosphere including the radiation belt and ring current environment is replete with high-frequency fluctuations with peak intensity occurring near upper-hybrid frequency and/or multiple harmonic electron cyclotron frequencies above and below the upper-hybrid frequency. Past and contemporary spacecraft missions, including the Van Allen Probes, were designed to detect the electric field spectrum only for these high-frequency fluctuations. Making use of the recently formulated generalized theory of electromagne ...
Yoon, Peter; Hwang, Junga; opez, Rodrigo; Kim, Sunjung; Lee, Jaejin;
Published by: Journal of Geophysical Research: Space Physics Published on: 07/2018
YEAR: 2018   DOI: 10.1029/2018JA025459
electromagnetic; parker solar probe; Solar Probe Plus; thermal noise; upper hybrid