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Found 4 entries in the Bibliography.
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Simulation of Plasma Emission in Magnetized Plasmas
The recent Parker Solar Probe observations of type III radio bursts show that the effects of the finite background magnetic field can be an important factor in the interpretation of data. In the present paper, the effects of the background magnetic field on the plasma-emission process, which is believed to be the main emission mechanism for solar coronal and interplanetary type III radio bursts, are investigated by means of the particle-in-cell simulation method. The effects of the ambient magnetic field are systematically s ...
Lee, Sang-Yun; Yoon, Peter; Lee, Ensang; Tu, Weichao;
Published by: \apj Published on: jan
YEAR: 2022   DOI: 10.3847/1538-4357/ac32bb
Parker Data Used; 1544; 1534; Astrophysics - Solar and Stellar Astrophysics
Solar Wind Temperature Isotropy
Reliable models of the solar wind in the near-Earth space environment may constrain conditions close to the Sun. This is relevant to NASA\textquoterights contemporary innerheliospheric mission Parker Solar Probe. Among the outstanding issues is how to explain the solar wind temperature isotropy. Perpendicular and parallel proton and electron temperatures near 1 AU are theoretically predicted to be unequal, but in situ observations show quasi-isotropy sufficiently below the instability threshold condition. This has not bee ...
Yoon, P.; Seough, J.; Salem, C.; Klein, K.;
Published by: Physical Review Letters Published on: 10/2019
YEAR: 2019   DOI: 10.1103/PhysRevLett.123.145101
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