Overmoded GW-class surface-wave microwave oscillator

Vlasov, Alexander N.; Shkvarunets, A. G.; Rodgers, J.; Carmel, Y.; Antonsen, Thomas M.; Abuelfadl, Tamer M.; Lingze, Duan; Черепенин, В. А.; Nusinovich, G. S.; Botton, M.; Granatstein, V.L.

doi:10.1109/27.887671

Cited by 178 publications

(24 citation statements)

References 21 publications

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“…In the process of Cherenkov-type interaction the electron bunching is caused by the axial component of the electric field E z given by Eq. (4). Correspondingly, taking into account the excitation of the forward wave C þ z by RF electrical current induced by an electron beam the self-consistent equations describing nonlinear dynamics of surface-wave oscillator can be presented in the form…”

Section: D Model Of a Surface-wave Oscillatormentioning

confidence: 99%

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Quasi-optical theory of relativistic surface-wave oscillators with one-dimensional and two-dimensional periodic planar structures

2013

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Within the framework of a quasi-optical approach, we develop 2D and 3D self-consistent theory of relativistic surface-wave oscillators. Presenting the radiation field as a sum of two counterpropagating wavebeams coupled on a shallow corrugated surface, we describe formation of an evanescent slow wave. Dispersion characteristics of the evanescent wave following from this method are in good compliance with those found from the direct CST simulations. Considering excitation of the slow wave by a sheet electron beam, we simulate linear and nonlinear stages of interaction, which allows us to determine oscillation threshold conditions, electron efficiency, and output coupling. The transition from the model of surface-wave oscillator operating in the p-mode regime to the canonical model of relativistic backward wave oscillator is considered. We also described a modified scheme of planar relativistic surface-wave oscillators exploiting twodimensional periodic gratings. Additional transverse propagating waves emerging on these gratings synchronize the emission from a wide sheet rectilinear electron beam allowing realization of a Cherenkov millimeter-wave oscillators with subgigawatt output power level. V C 2013 AIP Publishing LLC. [http://dx.

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Section: D Model Of a Surface-wave Oscillatormentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] Typically, nonlinear dynamics of surface-wave oscillators is analyzed by using direct particle-in-cell (PIC) simulations. 9,10 As we showed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Quasi-optical theory of relativistic surface-wave oscillators with one-dimensional and two-dimensional periodic planar structures

2013

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“…To overcome these problems, the overmoded structure is the best choice, though it was introduced for increasing the maximum handling power in microwave devices at first. [12][13][14] So an overmoded RSWO, one of typical Cerenkov devices, is adopted to generate 0.14 THz high power radiation in our design. The 0.14 THz RSWO with key structural parameters denoted is schematically shown in Fig.…”

Section: Design Of 014 Thz Overmoded Rswomentioning

confidence: 99%

A repetitive 0.14 THz relativistic surface wave oscillator

Wang¹,

Wang²,

Tong³

et al. 2013

Physics of Plasmas

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Preliminary experimental results of a repetitive 0.14 THz overmoded relativistic surface wave oscillator (RSWO) are presented in this paper. The repetitive RSWO is developed by using a rectangularly corrugated slow-wave structure with overmoded ratio of 3 and a foilless diode emitting annular electron beam with thickness of 0.5 mm. The high quality electron beams at the repetition rate of 10 are obtained over a wide range of diode voltage (180 kV < U < 240 kV) and current (700 A < I < 1.2 kA). The generation experiments of RSWO are conducted at an axial pulsed magnetic field whose maximum strength and duration can reach about 2.7 T and 1 s, respectively. The experimental results show that the RSWO successfully produces reasonable uniform terahertz pulses at repetition rate of 10, and the pulse duration, frequency, and power of a single pulse are about 1.5 ns, 0.154 THz, and 2.6 MW, respectively, whereas the dominated radiation mode of the RSWO is TM 02 .

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“…Among various HPM sources, slow wave type devices [3][4][5][6][7][8] are very attractive for their high efficiency and high stability, which are mainly due to the following two reasons. First, with the help of the guiding magnetic field, electron beams of high quality could be obtained, which can achieve better beam wave interaction with the slow wave structures (SWSs).…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of a Ka band high power millimeter wave generator operated at low guiding magnetic field

et al. 2011

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An overmoded slow wave type Ka band generator is investigated experimentally to produce high power millimeter waves in this paper. The experiments were carried out at the TORCH-01 accelerator. The produced microwave frequency was measured by dispersive line method, and the power was estimated by integrating over the radiation pattern at far field. With relatively low guiding magnetic field of 0.8 T and diode voltage and beam current of 590 kV and 5.2 kA, respectively, a 33.56 GHz millimeter wave with an output power of 320 MW was generated, and the microwave mode was quasi-TM 01 mode.

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Overmoded GW-class surface-wave microwave oscillator

Cited by 178 publications

References 21 publications

Quasi-optical theory of relativistic surface-wave oscillators with one-dimensional and two-dimensional periodic planar structures

Quasi-optical theory of relativistic surface-wave oscillators with one-dimensional and two-dimensional periodic planar structures

A repetitive 0.14 THz relativistic surface wave oscillator

Experimental investigation of a Ka band high power millimeter wave generator operated at low guiding magnetic field

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