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FEATURED STORIES - JUNE 2016
"Low Starting Electron Beam Current in Degenerate Band Edge Oscillators" by Mohamed A. K. Othman, Mehdi Veysi, Alexander Figotin, Filippo Capolino We propose a new principle of operation in vacuum electron-beam-based oscillators that leads to a low beam current for starting oscillations. The principle is based on supersynchronous operation of an electron beam interacting with four degenerate electromagnetic modes in a slow-wave structure (SWS). The four-mode supersynchronous regime is associated with a very special degeneracy condition in the dispersion diagram of a cold periodic SWS called degenerate band edge (DBE). This regime features a giant group delay in the finite-length SWS and low starting-oscillation beam current. The starting beam current is at least an order of magnitude smaller compared with a conventional backward-wave oscillator of the same length. As a representative example, we consider an SWS conceived by a periodically loaded metallic waveguide supporting a DBE and investigate starting-oscillation conditions using the Pierce theory generalized to coupled transmission lines. The proposed supersynchronism regime can be straightforwardly adapted to waveguide geometries others than the periodically loaded waveguide considered here since DBE is a general property that can be realized in a variety of structures. more...




A PUBLICATION OF THE IEEE NUCLEAR AND PLASMA SCIENCES SOCIETY
JUNE 2016 \| VOLUME 44 \| NUMBER 6 \| ITPSBD \| (ISSN 0093-3813)
REGULAR PAPERS Basic Processes in Fully and Partially Ionized Plasmas Controlling the Self-Focusing of Quadruple Gaussian Beam in Plasma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M. Moshkelgosha Modeling of Streamer Dynamics in Atmospheric-Pressure Air: Influence of Rise Time of Applied Voltage Pulse on Streamer Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. Y. Babaeva and G. V. Naidis Microwave Generation and Microwave-Plasma Interaction Curved Ring-Bar Slow-Wave Structure for Wideband MW-Power Traveling Wave Tubes . . . . . . . . . . . . . . . . . . . . . . M. Zuboraj and J. L. Volakis Cold Test Validation of Novel Slow Wave Structure for High-Power Backward-Wave Oscillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . U. Chipengo, N. K. Nahar, and J. L. Volakis Low Starting Electron Beam Current in Degenerate Band Edge Oscillators . . . . . . . . . . . . M. A. K. Othman, M. Veysi, A. Figotin, and F. Capolino Charged Particle Beams and Sources A Terahertz Electronic Source Based on the Spoof Surface Plasmon With Subwavelength Metallic Grating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Y.-Q. Liu, L.-B. Kong, C.-H. Du, and P.-K. Liu Industrial, Commercial, and Medical Applications of Plasmas Escherichia Coli Inactivation in Water Using Pulsed Discharge . . . . . . . . . . . . . . . . . . . . . . . Y. Huang, Y. Kou, C. Zheng, Y. Xu, Z. Liu, and K. Yan Repetitively Pulsed Discharges Ignited in Microchannels Between Two Nonequally Broad Planar Electrodes and Their Charging for Nanoscale Aerosol Particles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W. Yang, R. Zhu, and B. Ma Pulsed Power Science and Technology Experimental Study of Inductive Pulsed Power Supply Based on Multiple HTSPPT Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H. Li, Z. Yan, C. Zhang, Y. Wang, M. Gao, and G. Zou Thermal Properties of an Intense Relativistic Electron Beam Collector Under Repetitive Pulse Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .T. Xun, H. Yang, J. Zhang, and J. Zhang Temperature Dependence of Kerr Constant for Water at 658 nm and for Pulsed Intense Electric Fields . . . . . . . . . . . . . . . . . . . . . . . B. M. Novac, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R. Ruscassié, M. Wang, A. S. De Ferron, L. Pécastaing, I. R. Smith, and J. Yin Time-Varying Inductance of the Plasma Sheet in the PF1000 Plasma-Focus Device . . . . . . . . . . . . . H. Bruzzone, H. N. Acuña, M. O. Barbaglia, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M. M. Milanese, R. Miklaszewski, M. Paduch, E. Zieliñska, and A. Clausse Investigations Into 25- and 30-μm-Thick Glass Capacitors at 23 °C and 235 °C and Area Dependence of Dielectric Strength of Alkali-Free Schott Inc. AF 32 ECO Glass . . . . . . . . . . . . . . . . . . . . . . N. D. Zameroski, K. Spendier, D. Kerwin, M. Spencer, J. M. Parson, and C. Hettler Parametric Study of Possible Railgun Radiation in Postfire Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S. S. M. Chung Research on the Commutation-Induced Voltage of Helical Coil Electromagnetic Launchers . . . . . . . . . . . . . . D. Yang, T. Shu, Z. Liu, J. Ouyang, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Z. Shen, and L. Yang Arcs & MHD 3-D Flow Modeling of a Three-Phase AC Plasma Torch Working With Air Using a Stationary Source Domain With Gas Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S. Takali, V. J. Rohani, Y. Cressault, F. Fabry, F. Cauneau, and L. Fulcheri Space Plasmas Numerical Simulation of the Geometric Factor of a Cylindrical Electrostatic Analyzer to Monitor Electron Precipitation in the South Atlantic Magnetic Anomaly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. D. G. de Melo, I. H. Tan, J. J. Barroso, and R. S. Dallaqua Fusion Science and Technology Design Optimization of Multipole Galatea Trap Coils by Multiple Population Genetic Algorithm . . . . . . . . . . . . W. Tong, B. Tao, X. Jin, and Z. Li Special Issue on Dusty Plasmas 2015 Investigation of the Shielding Length on Yukawa System Crystallization in Mobile Sensor Network Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R. Tang, Z. Chen, Z. Liu, X. Qian, X. Yu, and C. Nie Mie-Scattering Ellipsometry System for Analysis of Dust Formation Process in Large Plasma Device . . . . . . . . . . . . . . . . . . . . . . . . Y. Hayashi, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M. Kawano, A. Sanpei, and S. Masuzaki Sputtering of Spherical SiO₂ Samples . . . . . . . . . . . . . . . . . . . . . M. Vyšinka, Z. Nĕmeček, J. Šafránková, J. Pavlů, J. Vaverka, and J. Lavková
ANNOUNCEMENTS Call for Papers—Special Issue for Selected Papers from EAPPC/BEAMS/MEGAGAUSS 2016 Call for Papers—Special Issue on Spacecraft Charging Technology 2017

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"Low Starting Electron Beam Current in Degenerate Band Edge Oscillators"

A PUBLICATION OF THE IEEE NUCLEAR AND PLASMA SCIENCES SOCIETY