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Full-Text Articles in Physical Sciences and Mathematics
Nonlinear Deformed Su(2) Algebras Involving Two Deforming Function, Andrei Ludu
Nonlinear Deformed Su(2) Algebras Involving Two Deforming Function, Andrei Ludu
Andrei Ludu
No abstract provided.
High-Frequency Fluctuations Of A Modulated, Helical Electron Beam, Mark Anthony Reynolds
High-Frequency Fluctuations Of A Modulated, Helical Electron Beam, Mark Anthony Reynolds
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The high-frequency electromagnetic field generated by a density-modulated, helical electron beam propagating in a magnetized plasma is calculated. The magnetic fluctuations are found to exhibit spatially localized ~evanescent! resonances at harmonics of the electron-cyclotron frequency, whose width is determined by the pitch angle of the beam, and whose existence is a consequence of the helical geometry. In addition, electrostatic modes are radiated near the hybrid frequencies, and electromagnetic modes are radiated above the upper-hybrid frequency. The predicted frequency spectrum and mode structure in configuration space are in good agreement with experimental observations of discrete emission lines at the electron-cyclotron harmonics.