Preliminary results from a microwave-driven 100 μm wavelength Cherenkov FEL experiment

Walsh, John E.; Shaughnessy, C.; Layman, R. W.; Dattoli, G.; Gallerano, G.P.; Renieri, A.

doi:10.1016/0168-9002(88)90210-0

Cited by 21 publications

(3 citation statements)

References 5 publications

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“…C-FEL is an apparatus used to generate a wave that travels more slowly than an EM wave. The C-FEL was allegedly operated with three unusual types of beam generators [24]: a transformer with a high-voltage pulse (100-250 kV), a used Marx generator (550 kV-1.1 MV), and a small RF-driven cylindrical accelerator (5 MV). The high-voltage pulse-transformer-based device has been selected since it is used for experiments involving mm wavelength.…”

Section: C-fel Beammentioning

confidence: 99%

Cherenkov FEL Reaction With Plasma-Filled Cylindrical Waveguide in FractionalD-Dimensional Space

Abo-Seida

Eldabe

Ali

et al. 2021

IEEE Trans. Plasma Sci.

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The possibility of generating an electromagnetic (EM) wave by a free-electron laser (FEL) beam from the Cherenkov device to control the cylindrical waveguide's field attenuation filled with plasma has been investigated by analytical formalism. This new study sheds light on Cherenkov FEL (C-FEL) beam interaction with electrons of inhomogeneous warm plasma to generate an EM wave in fractional dimensional space. The new analysis of traveling and standing waves in terms of Hankel and Bessel functions paves a way for introducing controlled EM wave propagation based on fractional D-dimensional space. It has been found that the C-FEL beam excites the EM wave and enhances the propagation of the electrical field through fractional dimensional space with propagation constant depending on the Langmuir frequency. Within the plasma in the cylindrical waveguide, a TM mode emerges, which contains spatial frequencies with a faster growth rate for traveling waves than standing waves.

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Section: C-fel Beammentioning

confidence: 99%

Cherenkov FEL Reaction With Plasma-Filled Cylindrical Waveguide in FractionalD-Dimensional Space

Abo-Seida

Eldabe

Ali

et al. 2021

IEEE Trans. Plasma Sci.

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“…Such a small gap would present severe technical problems and the electron beam would hardly be able to pass through the gap. In a preliminary experiment (Walsh et al 1988), the gap width is assumed to be 1-2mm, thus the gap width factor n = 373-75. For such a waveguide with the beam voltage given in (13), the field distribution in the gap is highly evanescent away from the dielectrics Qingyuan W a n g et al…”

Section: Beam Channel Widthmentioning

confidence: 99%

Cerenkov free-electron laser with a dielectric-lined double-slab waveguide

Wang

Xun

Liu

1991

International Journal of Electronics

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The dispersion relations of dielectric-lined double-slab waveguides used in Cerenkov free-electron lasers are derived and the existence of a group of odd modes, which can be simultaneously excited with the previously considered even modes, is reported. A discussion on the dependence of the radiation frequency and single-pass gain on the system parameters, the dielectric thickness, the beam energy and the beam channel width, is presented. The effects of the odd modes on the Cerenkov free-electron laser operation are investigated.

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“…The Cherenkov maser utilizes a dielectric wall in a cylindrical waveguide to reduce the velocity of the EM waves [5], [6]. However, this device may not be suitable for direct applications in the field of electronics, because investigations of the device have been performed at voltages larger than several hundred volts to generate high-power EM waves at wavelengths longer than 100 m.…”

mentioning

confidence: 99%

Theoretical proposal for a unidirectional optical amplifier

Yamada

1999

IEEE J. Quantum Electron.

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Preliminary results from a microwave-driven 100 μm wavelength Cherenkov FEL experiment

Cited by 21 publications

References 5 publications

Cherenkov FEL Reaction With Plasma-Filled Cylindrical Waveguide in FractionalD-Dimensional Space

Cherenkov FEL Reaction With Plasma-Filled Cylindrical Waveguide in FractionalD-Dimensional Space

Cerenkov free-electron laser with a dielectric-lined double-slab waveguide

Theoretical proposal for a unidirectional optical amplifier

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