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- W4387302571 abstract "In magnetized tenuous plasma, typical at the plasma edge of fusion devices, a nearly electrostatic wave mode with relatively enhanced electric field can propagate along a specific angle with the magnetic field. For this characteristic, it is known as a “resonance cone.” For instance, these waves can be excited by radio frequency antennas in the ion-cyclotron and lower-hybrid range of frequencies. We consider the resonance cones emitted by idealized spatially extended sources. In 2D, we use a novel geometric construction which generalizes the d'Alembert solution to curved boundaries/moving sources, and show, for the first time, that singular electric fields arise under these conditions, thereby bringing the resonance cones in line with the other resonances of the cold plasma theory. Still in 2D, we give an expression for the amount of power radiated by resonance cones in terms of surface quantities on the source, which is finite despite the singular electric field. We generalize the conclusions regarding the presence and location of singular electric fields to the 3D electromagnetic case." @default.
- W4387302571 created "2023-10-04" @default.
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- W4387302571 date "2023-10-01" @default.
- W4387302571 modified "2023-10-04" @default.
- W4387302571 title "Resonance cones in cold plasma: Origin, singularities, and power flow" @default.
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- W4387302571 doi "https://doi.org/10.1063/5.0152069" @default.
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