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Preliminary Analysis of the Coaxial Double Staggered Grating Structure for a Hollow Beam Backward Wave Oscillator

Zheng, Yuan ; Luhmann, N. C.

IEEE transactions on electron devices, 2022-07, Vol.69 (7), p.3941-3946 [Periódico revisado por pares]

New York: IEEE

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Título:
Preliminary Analysis of the Coaxial Double Staggered Grating Structure for a Hollow Beam Backward Wave Oscillator
Autor: Zheng, Yuan ; Luhmann, N. C.
Assuntos: Backward wave oscillators (BWOs) ; Backward waves ; Circuits ; Couplers ; Current density ; Dispersion ; Electron beams ; Electrons ; Engineering ; high-order mode operation ; hollow electron beam ; Impedance ; Interception ; Kinking ; Particle in cell technique ; Physics ; Plasma diagnostics ; Power generation ; Power management ; Power sources ; Radio frequency ; slow wave structure (SWS) ; Terahertz frequencies ; Waveguides
É parte de: IEEE transactions on electron devices, 2022-07, Vol.69 (7), p.3941-3946
Notas: FG02-99ER54518; FG02-99ER54531
USDOE Office of Science (SC)
Descrição: In this article, a novel coaxial double staggered grating (CDSG) slow wave structure (SWS) evolving from the double staggered grating (DSG) SWS is proposed to develop a high-power, miniaturized vacuum power source for plasma diagnostics systems over the terahertz (THz) band. Conformal to the hollow electron beam, the ring-shaped beam tunnel of this novel SWS can mitigate the kinking and filamentation instability, thereby facilitating the high-density beam transport and use of a uniform magnetic field. Ridges have been added to the CDSG imposing the operation mode polarization direction and suppressing lower order competing modes. Compared with the DSG high-frequency circuit, the ridge-loaded CDSG one can support a higher beam current without causing a beam-wall interception, thereby improving the output power of the devices. A compact coupler has been designed to transfer the high-order operation mode into the TE10 waveguide mode and export the RF power. The particle-in-cell (PIC) simulation results of the demonstration novel ridge-loaded CDSG backward wave oscillator (BWO) predict a stable operation and 120-W peak power near 0.2 THz.
Editor: New York: IEEE
Idioma: Inglês

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Preliminary Analysis of the Coaxial Double Staggered Grating Structure for a Hollow Beam Backward Wave Oscillator

Zheng, Yuan ; Luhmann, N. C.

New York: IEEE

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