Article
Geosciences, Multidisciplinary
S. Toledo-Redondo, J. H. Lee, S. K. Vines, D. L. Turner, R. C. Allen, M. Andre, S. A. Boardsen, J. L. Burch, R. E. Denton, H. S. Fu, S. A. Fuselier, D. J. Gershman, B. Giles, D. B. Graham, N. Kitamura, Yu. V. Khotyaintsev, B. Lavraud, O. Le Contel, W. Y. Li, T. E. Moore, E. A. Navarro, J. Porti, A. Salinas, A. Vinas
Summary: The study reports observations of ion dynamics within an Alfven branch wave near the dayside magnetopause, with measurements consistent with a dispersion solver's predictions. The magnetospheric plasma includes hot protons, cold protons, and heavy ions, showing how cold protons exchange energy adiabatically with the wave fields. Increasing cold proton density facilitates wave propagation and amplification, particularly at oblique angles, as observed.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Zuxiang Xue, Zhigang Yuan, Xiongdong Yu, Dan Deng, Zheng Huang, T. Raita
Summary: This study observed electromagnetic ion cyclotron (EMIC) waves simultaneously in the day- and night-side region due to a sudden enhancement of solar wind pressure. The observed EMIC wave amplitudes are closely correlated to the intensification of the ambient magnetic field caused by the enhanced solar wind pressure pulse. This study provides direct observational evidence that enhanced solar wind pressure pulse can directly drive the ring current ion dynamics and EMIC wave evolutions throughout the inner magnetosphere.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Astronomy & Astrophysics
Xiang Xu, Chen Zhou
Summary: This study investigates the influence of ion composition and electron density on the mode conversion process from fast magnetosonic (MS) wave to electromagnetic ion cyclotron (EMIC) wave. It is found that there is a critical fraction of minority ion, above which the conversion to right-handedly polarized EMIC wave becomes negligible. Additionally, the efficiency of this conversion process decreases with increasing electron density.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Zuxiang Xue, Zhigang Yuan, Xiongdong Yu, Dan Deng, Zheng Huang
Summary: This paper provides detailed analysis on the cross-band second harmonic (SH) generation of electromagnetic ion cyclotron (EMIC) waves in a multi-ion plasma. The presence of heavy ions allows for the existence of SH in a different wave band from that of the fundamental wave (FW), potentially leading to more efficient energy transfer. The study also demonstrates the vital role of heavy ions in promoting SH's amplitude.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Multidisciplinary Sciences
Masafumi Shoji, Yoshizumi Miyoshi, Lynn M. Kistler, Kazushi Asamura, Ayako Matsuoka, Yasumasa Kasaba, Shoya Matsuda, Yoshiya Kasahara, Iku Shinohara
Summary: A study using Arase data provides the first observational evidence that the frequency drift of electromagnetic ion cyclotron (EMIC) waves is caused by cyclotron trapping. By analyzing wave data observed by Arase from March 2017 to September 2019, researchers found the best falling tone emission event and showed direct evidence of the formation of a proton hill.
SCIENTIFIC REPORTS
(2021)
Article
Geosciences, Multidisciplinary
M. Fraz Bashir, Anton Artemyev, Xiao-Jia Zhang, Vassilis Angelopoulos
Summary: This article investigates the effects of hot plasma on the dispersion of EMIC waves and finds that hot plasma effects can increase the minimum resonant energy in the frequency range around wave intensity maxima, but may decrease the minimum resonant energy for the higher-frequency part of wave spectra.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Engineering, Marine
V. Prabu Kumar, R. Sundaravadivelu, K. Murali
Summary: This study investigates the hydrodynamic properties and proximity effects of dual offshore intake wells installed in the vicinity. A physical model study is conducted using 1:20 scale models in a regular wave environment. The wave run-up and rundown, free surface water oscillation, and diffraction wave heights are measured to analyze the influence of the orientation on these parameters and gain insight into the non-linear responses captured during the wave structure interaction.
Article
Geosciences, Multidisciplinary
Dan Deng, Zhigang Yuan, Shiyong Huang, Zuxiang Xue, Zheng Huang, Xiongdong Yu
Summary: In this paper, it is demonstrated that electromagnetic ion cyclotron (EMIC) harmonic waves are generated through nonlinear wave-wave resonances. The study also highlights the important role of the second harmonic in the generation of higher harmonics.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Astronomy & Astrophysics
S. K. Vines, B. J. Anderson, R. C. Allen, R. E. Denton, M. J. Engebretson, J. R. Johnson, S. Toledo-Redondo, J. H. Lee, D. L. Turner, R. E. Ergun, R. J. Strangeway, C. T. Russell, H. Wei, R. B. Torbert, S. A. Fuselier, B. L. Giles, J. L. Burch
Summary: The study introduces a technique using wave magnetic field curl to determine k, validated through analyses of synthetic and observed EMIC waves. Comparisons with other observational techniques and theoretical models demonstrate good agreement in deriving k values. The method has been proven to be robust and effective for determining wave vector properties systematically with MMS.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2021)
Article
Geosciences, Multidisciplinary
Xing Cao, Peng Lu, Binbin Ni, Danny Summers, Yuri Y. Shprits, Minyi Long, Xiaoyu Wang
Summary: By constructing an empirical model based on Cassini datasets, this study investigates the resonant interactions between ion cyclotron waves and radiation belt electrons at Saturn. It is found that the ion cyclotron waves can efficiently scatter high-energy electrons into the loss cone, inducing precipitation loss. The electron loss timescales decrease significantly with increasing L-shell and the presence of pick-up ring particles can affect the pitch angle scattering efficiency for lower energy electrons.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Chemistry, Analytical
Valeriu Savu, Madalin Ion Rusu, Dan Savastru
Summary: The article discusses the energy radiation phenomenon of Cherenkov cones produced by neutrinos in cosmic radiation and proposes reducing the number of sensors and costs by determining the dielectric permittivity. This method can help better understand the phenomena formed in the universe and reconstruct Cherenkov cones outside the detector volume.
Article
Chemistry, Physical
Aming Xie, Ronghui Guo, Lipeng Wu, Wei Dong
Summary: The ion-substitution strategy can effectively regulate the interfacial properties of hierarchical structures, leading to high-performance electromagnetic wave absorption materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Astronomy & Astrophysics
Qi Zhu, Xing Cao, Binbin Ni, Xudong Gu, Xin Ma
Summary: This study investigates the effects of hot protons on the scattering loss of ring current protons induced by electromagnetic ion cyclotron (EMIC) waves, by calculating the proton bounce-averaged pitch angle diffusion coefficients. The results show that inclusion of hot protons significantly decreases the diffusion coefficients of low-energy protons, while increasing the scattering efficiency of high-energy protons at certain angles. The cold plasma approximation underestimates the loss timescales of low-energy protons but overestimates that of high-energy protons. The differences in proton loss timescales caused by hot protons depend on the hot proton concentration, temperature anisotropy, and L-shell.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Xiang Xu, Chen Zhou, Lunjin Chen, Richard B. Horne
Summary: This study investigates the propagation of fast magnetosonic (MS) waves and their conversion into electromagnetic ion cyclotron (EMIC) waves from high to extremely low L shells using a ray tracing model and a full-wave model. The findings show that MS waves near the local H+-He+ crossover frequency at low L shells have a certain range of latitudes and wave normal angles, providing the opportunity for mode conversion to EMIC waves. The results also demonstrate the efficiency of wave energy transfer depends on magnetic latitudes and wave normal angles. This research contributes to a better understanding of the properties and distribution of MS and EMIC waves observed at extremely low L shells.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yang Li, Yuchang Qing, Yaru Cao, Fa Luo, Hongjing Wu
Summary: Although many experiments have been conducted on defect engineering in semiconductor absorbers, the systematic relationship between charge carriers, defects, heterointerfaces, and electromagnetic wave absorption has not been established. In this study, a new thermodynamic and kinetic control strategy is proposed to create multiphase TixO2x-1 materials through hydrogenation calcination. The TiOC-900 composite demonstrates efficient electromagnetic wave absorption due to conductance loss and interfacial polarization, suggesting a new pathway for designing high-efficiency EM wave absorbing semiconducting oxides.
Article
Physics, Fluids & Plasmas
Manfred A. Hellberg, Frank Verheest, Richard L. Mace
PHYSICS OF PLASMAS
(2018)
Article
Computer Science, Interdisciplinary Applications
S. Dalena, P. Chuychai, R. L. Mace, A. Greco, G. Qin, W. H. Matthaeus
COMPUTER PHYSICS COMMUNICATIONS
(2012)
Article
Computer Science, Interdisciplinary Applications
R. F. Abdul, R. L. Mace
COMPUTER PHYSICS COMMUNICATIONS
(2014)
Article
Astronomy & Astrophysics
F. D. Henning, R. L. Mace, S. R. Pillay
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2011)
Article
Astronomy & Astrophysics
R. L. Mace, R. D. Sydora, I. Silin
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2011)
Article
Physics, Fluids & Plasmas
G. M. Webb, R. L. Mace
JOURNAL OF PLASMA PHYSICS
(2015)
Article
Physics, Fluids & Plasmas
S. Dalena, A. Greco, A. F. Rappazzo, R. L. Mace, W. H. Matthaeus
Article
Physics, Fluids & Plasmas
R. L. Mace, S. Dalena, W. H. Matthaeus
PHYSICS OF PLASMAS
(2012)
Article
Physics, Fluids & Plasmas
F. Nsengiyumva, R. L. Mace, M. A. Hellberg
PHYSICS OF PLASMAS
(2013)
Article
Physics, Fluids & Plasmas
F. Nsengiyumva, M. A. Hellberg, F. Verheest, R. L. Mace
PHYSICS OF PLASMAS
(2014)
Article
Physics, Fluids & Plasmas
R. L. Mace
PHYSICS OF PLASMAS
(2018)
Article
Physics, Fluids & Plasmas
R. F. Abdul, A. P. Matthews, R. L. Mace
Summary: This study investigates the electron temperature anisotropy driven whistler instability using bi-kappa velocity distribution. The results show that the Maxwellian electron run has the fastest growth rate, while the kappa e = 2 case exhibits the slowest growth rate.
PHYSICS OF PLASMAS
(2021)
Article
Physics, Fluids & Plasmas
R. F. Abdul, R. L. Mace
PHYSICS OF PLASMAS
(2015)
Article
Physics, Fluids & Plasmas
F. Nsengiyumva, M. A. Hellberg, R. L. Mace
PHYSICS OF PLASMAS
(2015)