High-Power Microwave Pulses Generated by a Resonance Relativistic Backward Wave Oscillator with a Power Supply System Based on Explosive Magnetocumulative Generators

Gorbachev, K. V.

doi:10.1134/1.2061744

Cited by 5 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the wave-beam interaction, the −1st spatial harmonic and the fundamental harmonic play the most important role in the wave-beam interaction [29], [38], [39]. Moreover, it is found that the field amplitudes of the −1st spatial harmonic and the fundamental harmonic are much larger than those of the other spatial harmonics.…”

Section: Field Distribution Of Spatial Harmonic In Corrugated Wamentioning

confidence: 99%

Theoretical Research on Properties of Spatial Harmonics in Corrugated Waveguide

Teng

Wang

et al. 2019

IEEE Access

View full text Add to dashboard Cite

This paper investigates the dependence of the properties of the spatial harmonics on the overmoded ratio of the corrugated waveguide operating in TM 01 at 30 GHz with the consideration of the effects of the ripple shape. It is found that as the overmoded ratio grows, the electric fields concentrate towards the ripple surface, which weakens the enhancement of the power handling capacity caused by augmentation of the overmoded ratio. As the overmoded ratio grows, the ratio between the field amplitudes of the −1st spatial harmonic and the fundamental harmonic increases monotonically. Therefore, the total electric fields composed of the spatial harmonics become the spatial beating-wave with the single frequency, whose amplitudes vary along z-axis with the spatial period determined mainly by the −1st spatial harmonic and the fundamental harmonic. Researches on coupling impedances show that with the same overmoded ratio, the corrugated waveguide consisting of the improved rectangular ripples provides better synchronous coupling for the wave-beam interaction than that of the sinusoidal ripples does. Moreover, it is better to choose the fundamental harmonic close to the light line as the synchronous wave for the wave-beam interaction in the low magnetic field. In that case, even if the electron beam keeps far away from the ripple surface, the synchronous wave still provides strong enough coupling for the electron beam. INDEX TERMS Corrugated waveguide, coupling impedance, field distribution, high power microwave generation, overmoded ratio.

show abstract

Section: Field Distribution Of Spatial Harmonic In Corrugated Wamentioning

confidence: 99%

Theoretical Research on Properties of Spatial Harmonics in Corrugated Waveguide

Teng

Wang

et al. 2019

IEEE Access

View full text Add to dashboard Cite

show abstract

“…Single-mode generation at a frequency of 3.6 GHz with a maximum pulse power of 5.3 GW was produced in experiments [2,4]. Based on the resonant oscillator scheme the possibility of generating high-power microwave pulses with an efficiency of 14% with a power supply system based on explosive magnetocumulative generators has been demonstrated [5]. A stable repetition rate mode of BWO's generation with an output power of 1 GW at a microwave pulses duration of 100 ns and a repetition rate of 10 Hz has been successfully implemented [6].…”

Section: Introductionmentioning

confidence: 99%

Efficiency of moderately relativistic resonant S-band BWO

Molchanov¹,

Gurnevich²

2022

8th International Congress on Energy Fluxes and Radiation Effects

View full text Add to dashboard Cite

The scheme of a resonant relativistic backward wave oscillator (BWO) was proposed by the group of researchers from IHCE SB RASfor efficient generation of high-power microwave radiation in the S-band while maintaining relatively small structure length about 2.5 λ. As far as can being found from publications, the scheme proposed uses high-current relativistic electron beams with energies of 0.7–1.5 MeV and a strong guiding magnetic field (at least 1.5 T, typically 2–3 T). In this paper, we propose a variant of a resonant relativistic backward wave oscillator that operates at moderately relativistic beam energies (450–550 keV) and at guiding magnetic field values starting from 1.3 T. Compared to the original resonant BWO geometry, in the current investigated scheme, the length of the periodic structure is increased by 1 period. For optimization using particle-in-cell code XOOPIC, the length of the insert between the cutoff-neck and the periodic structure, as well as the profiles of two terminal corrugations (defining the reflections from boundaries of periodic structure) are varied. It is shown in the numerical simulation that for a beam energy of 500–550 keV the average radiation power in proposed RBWO reaches level of 1 GW and efficiency is up to 27–28%.

show abstract

“…High-voltage generators of intense electron beams of subnanosecond duration with energy in the range of hundreds of keV are widely used in tasks of forming powerful nanosecond and picosecond x-ray pulses, broadband optical pulses, microwave and ultra-wideband radio-frequency signals, as well as hypersonic pulses in radiation-resistant crystals [1][2][3][4][5]. In addition, still in early studies, it has been found that such facilities generated beams of multiple charged ions of the cathode material, whose energy per unit charge significantly exceeded the discharge voltage [6].…”

Section: Introductionmentioning

confidence: 99%

Collective acceleration of ions in picosecond pinched electron beams

Baryshnikov¹,

Paperny²,

Shipayev³

2017

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Сharacteristics of intense electron-ion beams emitted by a high-voltage (280 kV) electron accelerator with a pulse duration of 200 ps and current 5 kA are studied. The capture phenomena and the subsequent collective acceleration of multi charged ions of the cathode material by the electric field of the electron beam are observed. It is shown that the electronion beam diameter does not exceed 30 µm therein in the case of lighter ions, and the decay of the pinched beam occurs at a shorter distance from the cathode. It is established that the ions of the cathode material Ti n+ captured by the electron beam are accelerated up to an energy of ⩽10 MeV, and the ion fluence reaches 10 17 ion cm −2 in the pulse. These ions are effectively embedded into the lattice sites of the irradiated substrate (sapphire crystal), forming the luminescent areas of the micron scale.

show abstract

High-Power Microwave Pulses Generated by a Resonance Relativistic Backward Wave Oscillator with a Power Supply System Based on Explosive Magnetocumulative Generators

Cited by 5 publications

References 1 publication

Theoretical Research on Properties of Spatial Harmonics in Corrugated Waveguide

Theoretical Research on Properties of Spatial Harmonics in Corrugated Waveguide

Efficiency of moderately relativistic resonant S-band BWO

Collective acceleration of ions in picosecond pinched electron beams

Contact Info

Product

Resources

About