Search Results - "Antonsen, Thomas"

Low dimensional behavior of large systems of globally coupled oscillators by Ott, Edward, Antonsen, Thomas M

“…It is shown that, in the infinite size limit, certain systems of globally coupled phase oscillators display low dimensional dynamics. In particular, we derive…”
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Universal instability for wavelengths below the ion Larmor scale by Landreman, Matt, Antonsen, Thomas M, Dorland, William

“…We demonstrate that the universal mode driven by the density gradient in a plasma slab can be absolutely unstable even in the presence of reasonable magnetic…”
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Adjoint Equations and Their Application to Helix TWT Design by Chernin, David, Vlasov, Alexander N., Antonsen, Thomas M., Chernyavskiy, Igor A.

“…We derive and apply a set of adjoint equations to the problem of determining the effect of small changes of the values of various design parameters on the…”
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A Stochastic Green's Function for Solution of Wave Propagation in Wave-Chaotic Environments by Lin, Shen, Peng, Zhen, Antonsen, Thomas M.

“…We present a statistical, mathematical, and computational model for prediction and analysis of wave propagation through complex, wave-chaotic environments…”
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Advances in the Theory and Modeling of Linear Beam VE Amplifiers by Antonsen, Thomas M., Chernyavskiy, Igor A., Chernin, David, Vlasov, Alexander N., Levush, Baruch

“…We present an overview of the progress made by our Naval Research Laboratory (NRL)-based group over the last 25 years in the development of computational tools…”
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Deviations From the Random Plane Wave Field Distribution in Electromagnetic Enclosures by Adnan, Farasatul, Anlage, Steven M., Antonsen, Thomas M., Ott, Edward

“…Wave energy distribution within enclosures with irregular boundaries is a common phenomenon in many branches of electromagnetics. If the wavelength of the…”
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Adjoint Equations for Beam-Wave Interaction and Optimization of TWT Design by Vlasov, Alexander N., Antonsen, Thomas M., Chernin, David, Chernyavskiy, Igor A.

“…By formulating and solving the adjoint equations governing the beam-wave interaction in a traveling-wave tube (TWT), we show the partial derivatives with…”
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Large coupled oscillator systems with heterogeneous interaction delays by Lee, Wai Shing, Ott, Edward, Antonsen, Thomas M

“…In order to discover generic effects of heterogeneous communication delays on the dynamics of large systems of coupled oscillators, this Letter studies a…”
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An improved iteration loop for the three dimensional quasi-static particle-in-cell algorithm: QuickPIC by An, Weiming, Decyk, Viktor K., Mori, Warren B., Antonsen, Thomas M.

“…We present improvements to the three-dimensional (3D) quasi-static particle-in-cell (PIC) algorithm, which is used to efficiently model short-pulse laser and…”
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Self-Excitation Thresholds in RF Structures by Jabotinski, Vadim, Chernyavskiy, Igor A., Vlasov, Alexander N., Antonsen, Thomas M., Levush, Baruch

“…A theory and general method for calculating self-excitation thresholds for a large class of standing and traveling-wave structures used in amplifiers,…”
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Modeling the network dynamics of pulse-coupled neurons by Chandra, Sarthak, Hathcock, David, Crain, Kimberly, Antonsen, Thomas M, Girvan, Michelle, Ott, Edward

“…We derive a mean-field approximation for the macroscopic dynamics of large networks of pulse-coupled theta neurons in order to study the effects of different…”
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Statistical Prediction and Measurement of Induced Voltages on Components Within Complicated Enclosures: A Wave-Chaotic Approach by Hemmady, Sameer, Antonsen, Thomas M., Ott, Edward, Anlage, Steven M.

“…We consider induced voltages on electronic components housed inside complicated enclosures and subjected to high-frequency radiation. The enclosure is assumed…”
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Predicting the statistics of wave transport through chaotic cavities by the random coupling model: A review and recent progress by Gradoni, Gabriele, Yeh, Jen-Hao, Xiao, Bo, Antonsen, Thomas M., Anlage, Steven M., Ott, Edward

“…In this review, a model (the random coupling model) that gives a statistical description of the coupling of radiation into and out of large enclosures through…”
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Numerical Determination of Vacuum Electronic Device Stability by Chernyavskiy, Igor A., Antonsen, Thomas M., Vlasov, Alexander N., Levush, Baruch

“…We present a new approach to the study of the stability of vacuum electronic devices (VEDs) using the Naval Research Laboratory (NRL) large-signal code…”
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First Principles Codes and Analysis Environments for Vacuum Electronics Simulation by Petillo, John J., Cooke, Simon J., Antonsen, Thomas M., Ovtchinnikov, Serguei G., Jensen, Aaron J., Nelson, Eric M., Jensen, Kevin L., Levush, Baruch

“…The status of first principles modeling and simulation tools for vacuum electronics (VEs) is presented. These tools, when combined with parametric beam-wave…”
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A Statistical Model for the Excitation of Cavities Through Apertures by Gradoni, Gabriele, Antonsen, Thomas M., Anlage, Steven M., Ott, Edward

“…In this paper, a statistical model for the coupling of electromagnetic radiation into enclosures through apertures is presented. The model gives a unified…”
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Modeling Vacuum Electronic Devices Using Generalized Impedance Matrices by Chernyavskiy, Igor A., Antonsen, Thomas M., Rodgers, John C., Vlasov, Alexander N., Chernin, David, Levush, Baruch

“…We have developed a general approach to modeling a large class of vacuum electronic devices (VEDs) by using impedance matrices to characterize the…”
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Ka-Band Low-Voltage Multiple-Beam Mini-TWT by Joye, Colin D., Vlasov, Alexander N., Jaynes, Reginald, Chernyavskiy, Igor A., Nguyen, Khanh T., Pasour, John, Rodgers, John C., Wood, Franklin N., Jabotinski, Vadim, Antonsen, Thomas M., Cooke, Simon J., Cook, Alan M., Levush, Baruch

“…We describe the design, development, and initial testing of a very compact, multiple-beam folded-waveguide traveling wave tube (TWT) operating in Ka -band at…”
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Calculation and Application of Impedance Matrices for Vacuum Electronic Devices by Jabotinski, Vadim, Chernin, David, Antonsen, Thomas M., Vlasov, Alexander N., Chernyavskiy, Igor A.

“…We present a computationally efficient method for the calculation of impedance (Z-) matrices for a large class of standing- and traveling-wave structures used…”
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Efficient Calculation of the Self-Magnetic Field, Self-Force, and Self-Inductance for Electromagnetic Coils by Hurwitz, Siena, Landreman, Matt, Antonsen, Thomas M.

“…The design of electromagnetic coils may require evaluation of several quantities that are challenging to compute numerically. These quantities include Lorentz…”
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