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Browsing College of Sciences and Mathematics by Author "Min, Kyungguk"

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Regime transition of ion Bernstein instability driven by ion shell velocity distributions 

Min, Kyungguk; Liu, Kaijun; 0000-0001-5882-1328 (2022-09-29)
Linear kinetic dispersion theory is used to investigate a regime transition of the ion Bernstein instability driven by a proton velocity distribution with positive slopes with respect to the perpendicular velocity, ...

Regime transition of ion Bernstein instability driven by ion shell velocity distributions 

Min, Kyungguk; Liu, Kaijun; 0000-0002-2095-8529; 0000-0001-5882-1328 (2020-06-03)
Linear kinetic dispersion theory is used to investigate a regime transition of the ion Bernstein instability driven by a proton velocity distribution with positive slopes with respect to the perpendicular velocity, ...

Ring/Shell Ion Distributions at Geosynchronous Orbit 

Thomsen, M. F.; Denton, M. H.; Gary, S. P.; Liu, Kaijun; Min, Kyungguk; 0000-0001-5882-1328 (2020-05-28)
One year's worth of plasma observations from geosynchronous orbit is examined for ion distributions that may simultaneously be subject to the ion Bernstein (IB) instability (generating fast magnetosonic waves) and the ...

Ring/Shell Ion Distributions at Geosynchronous Orbit 

Thomsen, M; Denton, M; Gary, S; Liu, Kaijun; Min, Kyungguk; 0000-0001-5882-1328; 0000-0002-4655-2316 (2022-11-01)
One year's worth of plasma observations from geosynchronous orbit is examined for ion distributions that may simultaneously be subject to the ion Bernstein (IB) instability (generating fast magnetosonic waves) and the ...

Scalings of Alfven-cyclotron and ion Bernstein instabilities on temperature anisotropy of a ring-like velocity distribution in the inner magnetosphere 

Gary, Peter; Min, Kyungguk; Liu, Kaijun; 0000-0001-5882-1328 (2022-09-29)
A ring-like proton velocity distribution with f(p)(v)/v>0 and which is sufficiently anisotropic can excite two distinct types of growing modes in the inner magnetosphere: ion Bernstein instabilities with multiple ion ...

Scalings of Alfven-cyclotron and ion Bernstein instabilities on temperature anisotropy of a ring-like velocity distribution in the inner magnetosphere 

Min, Kyungguk; Liu, Kaijun; Gary, S. Peter; 0000-0002-2095-8529; 0000-0001-5882-1328 (2020-06-03)
A ring-like proton velocity distribution with f(p)(v)/v>0 and which is sufficiently anisotropic can excite two distinct types of growing modes in the inner magnetosphere: ion Bernstein instabilities with multiple ion ...

Signatures of electron Landau resonant interactions with chorus waves from THEMIS observations 

Min, Kyungguk; Kaijun, Liu; Li, Wen; 0000-0001-5882-1328 (2022-10-04)
Simultaneous observations of electron phase space density (PSD) and chorus waves for more than 4 years by the Time History of Events and Macroscale Interactions during Substorms (THEMIS) are analyzed to identify signatures ...

Signatures of electron Landau resonant interactions with chorus waves from THEMIS observations 

Min, Kyungguk; Liu, Kaijun; Li, Wen; 0000-0002-2095-8529; 0000-0001-5882-1328 (2020-06-05)
Simultaneous observations of electron phase space density (PSD) and chorus waves for more than 4 years by the Time History of Events and Macroscale Interactions during Substorms (THEMIS) are analyzed to identify signatures ...

Solar cycle variation of plasma mass density in the outer magnetosphere: Magnetoseismic analysis of toroidal standing Alfven waves detected by Geotail 

Takahashi, Kazue; Denton, Richard E.; Hirahara, Masafumi; Min, Kyungguk; Ohtani, Shin-ichi; Sanchez, Ennio; 0000-0002-2095-8529 (2020-06-05)
We study the variation of plasma mass density in the outer magnetosphere over a solar cycle using mass density estimated from the frequency of fundamental toroidal standing Alfven waves observed by the Geotail spacecraft. ...

Solar cycle variation of plasma mass density in the outer magnetosphere: Magnetoseismic analysis of toroidal standing Alfven waves detected by Geotail 

Takahashi, Kazue; Denton, Richard; Hirahara, Masafumi; Min, Kyungguk; Ohtani, Shin-ichi; Sanchez, Ennio; 0000-0002-9565-6840; 0000-0003-1434-4456 (2023-01-25)
We study the variation of plasma mass density in the outer magnetosphere over a solar cycle using mass density estimated from the frequency of fundamental toroidal standing Alfven waves observed by the Geotail spacecraft. ...

Study of EMIC wave excitation using direct ion measurements 

Min, Kyungguk; Liu, Kaijun; Wygant, John R.; 0000-0002-2095-8529; 0000-0001-5882-1328 (2020-06-05)
With data from Van Allen Probes, we investigate electromagnetic ion cyclotron (EMIC) wave excitation using simultaneously observed ion distributions. Strong He band waves occurred while the spacecraft was moving through ...

Understanding the growth rate patterns of ion Bernstein instabilities driven by ring-like proton velocity distributions 

Min, Kyungguk; Liu, Kaijun; 0000-0001-5882-1328; 0000-0001-5882-1328 (2022-09-20)
Fast magnetosonic waves in Earth's inner magnetosphere, which have as their source ion Bernstein instabilities, are driven by hot proton velocity distributions (f(p)) with partial derivative f(p)(v(perpendicular to))/partial ...

Understanding the growth rate patterns of ion Bernstein instabilities driven by ring-like proton velocity distributions 

Min, Kyungguk; Liu, Kaijun; 0000-0002-2095-8529; 0000-0001-5882-1328 (2020-06-03)
Fast magnetosonic waves in Earth's inner magnetosphere, which have as their source ion Bernstein instabilities, are driven by hot proton velocity distributions (f(p)) with partial derivative f(p)(v(perpendicular to))/partial ...

Whistler anisotropy instabilities as the source of banded chorus: Van Allen Probes observations and particle-in-cell simulations 

Fu, Xiangrong; Liu, Kaijun; Min, Kyungguk; Winske, Dan; 0000-0001-5882-1328; 0000-0002-2095-8529 (2020-06-05)
Magnetospheric banded chorus is enhanced whistler waves with frequencies (r)<(e), where (e) is the electron cyclotron frequency, and a characteristic spectral gap at (r)similar or equal to(e)/2. This paper uses spacecraft ...

Whistler anisotropy instabilities as the source of banded chorus: Van Allen Probes observations and particle-in-cell simulations 

Fu, Xiangrong; Cowee, Misa; Friedel, Reinhard; Funsten, Herbert; Gary, S; Hospodarsky, George; Kletzing, Craig; Kurth, William; Larsen, Brian; Liu, Kaijun; MacDonald, Elizabeth; Min, Kyungguk; Reeves, Geoffrey; Skoug, Ruth; Winske, Dan; 0000-0003-3117-4030; 0000-0002-7985-8098; 0000-0002-6817-1039; 0000-0002-5228-0281; 0000-0003-4515-0208; 0000-0001-5882-1328; 0000-0003-3117-4030; 0000-0002-5471-6202; 0000-0001-5882-1328; 0000-0002-4305-6624; 0000-0001-9200-9878; 0000-0002-4136-3348; 0000-0003-1991-2643 (2023-01-25)
Magnetospheric banded chorus is enhanced whistler waves with frequencies (r)<(e), where (e) is the electron cyclotron frequency, and a characteristic spectral gap at (r)similar or equal to(e)/2. This paper uses spacecraft ...