Results 41 to 50 of about 30,961 (212)

Ion cyclotron emission in Maxwellian plasmas

Physics of Plasmas
Destabilization of ion cyclotron waves—waves with frequencies close to ion cyclotron harmonics—in inhomogeneous plasmas with Maxwell velocity distribution is considered. A new mechanism of destabilization of these waves is found, whereas the known interaction between cyclotron waves and drift waves is shown to be hardly able to lead to instabilities in
Ya. I. Kolesnichenko, V. V. Lutsenko, A. V. Tykhyy   +2 more
openaire   +1 more source

Atmospheres and radiating surfaces of neutron stars [PDF]

, 2016
The early 21st century witnesses a dramatic rise in the study of thermal radiation of neutron stars. Modern space telescopes have provided a wealth of valuable information which, when properly interpreted, can elucidate the physics of superdense matter ...
Potekhin, A. Y.
core   +1 more source

Ion cyclotron emission from energetic ion populations in fusion plasmas [PDF]

, 2019
In this thesis I present particle in cell (PIC) simulations of ion cyclotron emission (ICE). ICE comprises suprathermal radiation in the ion cyclotron frequency range, whose spectrum peaks at successive local cyclotron harmonics of the emitting energetic ion population.
openaire   +1 more source

Degradation Mechanism of Phosphate‐Based Li‐NASICON Conductors in Alkaline Environment

Advanced Energy Materials, Volume 15, Issue 11, March 18, 2025.
The presence of water in the cathode of a Li‐air battery shifts reactions to produce LiOH, creating a corrosive, alkaline environment. This study investigates the alkaline stability of the common Li‐NASICON solid‐state conductor chemistries through a systematic experimental study combined with computational modeling to understand the degradation ...
Benjamin X. Lam, Zhuohan Li, Tara P. Mishra, Gerbrand Ceder   +3 more
wiley   +1 more source

Dependence of CMI Growth Rates on Electron Velocity Distributions and Perturbation by Solitary Waves

, 2007
We calculate growth rates and corresponding gains for RX and LO mode radiation associated with the cyclotron maser instability for parameterized horseshoe electron velocity distributions.
Bastian, Baumback, Begelman, Bekefi, Benson, Benson, Bingham, Boehm, Brown, Calvert, Chaston, de Feraudy, Delory, Dulk, Ergun, Ergun, Ergun, Ergun, Goldman, Green, Green, Gurnett, Gurnett, Gurnett, Hanasz, Hashimoto, Hayes, Huff, J. D. Scudder, Kumamoto, Lee, Louarn, Louarn, McFadden, McFadden, Mellott, Melrose, Menietti, Menietti, Menietti, Morozova, Mutel, Mutel, Mutel, Omidi, Omidi, Omidi, Pottelette, Pottelette, Pottelette, Press, Pritchett, Pritchett, Pritchett, Pritchett, Pritchett, Pritchett, R. L. Mutel, Roux, Strangeway, Strangeway, T. R. Jaeger, Treumann, W. M. Peterson, Willes, Winglee, Wong, Wu, Wu, Xin, Yoon, Zarka   +71 more
core   +2 more sources

Dependence of ion-cyclotron range of frequencies instabilities on species mix and fast-ion distribution: II. Time evolution

Nuclear Fusion
Dedicated DIII-D experiments studied instabilities below the ion cyclotron frequency f _ci and at cyclotron harmonics by injecting thirteen different neutral beam populations into plasmas with different thermal compositions of H and D at five different ...
W.W. Heidbrink, G.H. DeGrandchamp, J.B. Lestz, K.E. Thome, S. Vincena, N.A. Crocker, X.D. Du, R.I. Pinsker, G.A. Riggs, S.X. Tang, M.A. Van Zeeland   +10 more
doaj   +1 more source

Electromagnetic ion cyclotron emission from ion-scale magnetic holes

Physics of Plasmas
Ion-scale magnetic holes are nonlinear plasma structures commonly observed in the solar wind and Earth's magnetosphere. These holes are characterized by the magnetic field depletion filled by hot, transversely anisotropic ions and electrons and are likely formed during the nonlinear stage of ion mirror instability.
Muhammad Shahid, M. Fraz Bashir, Anton V. Artemyev, Xiao-Jia Zhang, Vassilis Angelopoulos, G. Murtaza   +5 more
openaire   +1 more source

Predicting Performance of Hall Effect Ion Source Using Machine Learning

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
This study introduces HallNN, a machine learning tool for predicting Hall effect ion source performance using a neural network ensemble trained on data generated from numerical simulations. HallNN provides faster and more accurate predictions than numerical methods and traditional scaling laws, making it valuable for designing and optimizing Hall ...
Jaehong Park, Guentae Doh, Dongho Lee, Youngho Kim, Changmin Shin, Su‐Jin Shin, Young‐Chul Ghim, Sanghoo Park, Wonho Choe   +8 more
wiley   +1 more source

Spatiotemporal evolution of radio wave pump-induced ionospheric phenomena near the fourth electron gyroharmonic [PDF]

, 2007
On 12 November 2001, the European Incoherent Scatter (EISCAT) high-frequency (HF) radio wave transmitter facility, operating in O-mode at 5.423 MHz with 550 MW effective radiated power, produced artificial optical rings which appeared immediately at ...
Ashrafi, M., Isham, B., Kaila, K., Kosch, Mike J.   +3 more
core   +1 more source

Engineering Biochar‐Derived Functional Materials for High‐Performance Supercapacitors: Design Principles, Mechanisms, and Scalable Strategies

Carbon Energy, EarlyView.
ABSTRACT Biochar has emerged as a useful and adaptable source of carbon for supercapacitor electrodes. Its value comes from the way biomass chemistry, thermal conversion, and activation conditions shape the resulting pore network, surface groups, and degree of carbon ordering.
Soumen Mandal, Avinash C. Mendhe, Mayna Roy, Neha S. Barse, Taejoon Park, Han‐Seung Lee, Haigun Lee   +6 more
wiley   +1 more source