Subnanosecond 1-GW pulsed 38-GHz radiation source

Korovin, S. D.; Mesyats, G. A.; Rostov, V. V.; Ul’maskulov, M. R.; Sharypov, K. A.; Shpak, V. G.; Shunaĭlov, S. A.; Yalandin, M. I.

doi:10.1134/1.1666957

Cited by 20 publications

(10 citation statements)

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“…The possibility to vary I st follows from its dependence on the coupling resistance between the beam and the first backward space harmonic of the TM 01 wave (R) and on the length of the SWS (L): [25], and the references therein). The factor ∼L −3 offers a radical way to realize a nonstationary oscillation mode, but this calls for a longer SWS [16]- [18]. For a given L, the coupling resistance R can be varied in view of its dependence on radius: R = R(r ).…”

Section: Bwo Oscillation Mode Control Capabilitiesmentioning

confidence: 99%

“…However, if the electron current pulse duration is not greater than the time it takes for the excited electromagnetic signal to travel the feedback loop, oscillations may occur as a short burst of coherent super-radiation [15]. The resulting microwave pulse can be stable and capable of accumulating the energy of the counter beam and thus surpassing it in power [16]- [18].…”

Section: Introductionmentioning

confidence: 99%

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Control of the Operation Mode of a Relativistic <italic>Ka</italic>-Band Backward-Wave Oscillator

Boltachev

Rostov

Sharypov

et al. 2015

IEEE Trans. Plasma Sci.

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Variations in the transient time and in the microwave pulse duration and peak power have been demonstrated for a relativistic subgigawatt K a-band backwardwave oscillator (BWO) with the slow-wave structure geometry, the accelerating voltage, and the electron beam current remained unchanged. This was done taking into account that the BWO operation mode depends on the starting-current-tobeam-current ratio. Efficient variation of the starting current was attained by changing the beam path in view of a significant difference between the times of the guide pulsed magnetic field diffusion into the electron injection region and beam-wave interaction space.

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Section: Bwo Oscillation Mode Control Capabilitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Control of the Operation Mode of a Relativistic <italic>Ka</italic>-Band Backward-Wave Oscillator

Boltachev

Rostov

Sharypov

et al. 2015

IEEE Trans. Plasma Sci.

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“…Analogous experiments were performed in the millimeter-wave range [38]. The nonuniform slowwave system with a linearly increasing corrugation depth was 12 cm long (about 14λ) and had the average diameter 1.3λ.…”

Section: Experiments On Generation Of Superradiance Pulses With Peak mentioning

confidence: 99%

“…Development of these studies, in particular by using nonuniform slow-wave systems, allowed one to reach record (gigawatt) power levels. Until now, SR pulses whose peak power exceeds the power of a feeding electron beam have been obtained [34][35][36][37][38]. Simultaneously, improving the accelerator technique allowed one to realize regimes of periodic repetition of SR pulses with high (kilohertz) clock rate [17,19,[39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Generation of high-power ultrashort electromagnetic pulses on the basis of effects of superradiance of electron bunches

Zotova

Pegel

Rostov

et al. 2007

Radiophys Quantum El

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One of the promising methods for generation of ultrashort electromagnetic pulses (with duration of about ten periods of high-frequency oscillations) is radiation from spatially localized electron ensembles (bunches), which can be considered a classical analog of Dicke superradiance known in quantum electronics. In classical electronics, superradiance can be related to various mechanisms of stimulated radiation. Until now, cyclotron, undulator, andČerenkov (in the case of interaction with both copropagating and counterpropagating waves) superradiance of electron bunches as well as superradiance during stimulated scattering of a pump wave have been studied theoretically and experimentally. As a result of these studies based on high-current RADAN and SINUS accelerators and their modifications, a new class of oscillators producing pulsed electromagnetic radiation has been created. They have such unique characteristics as pulses of high peak power (up to 1 GW and 3 GW in the millimeter-and centimeter-wave ranges, respectively) and ultrashort duration (from 300 ps to 1 ns, respectively). In this case, regimes with a peak radiation power exceeding the electron-beam power are experimentally realized. Regimes with high (kilohertz) pulse repetition rate and high average power (up to 2.5 kW) are obtained.

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“…An effective method for generation of powerful pulses of coherent microwave electromagnetic radiation is the use of the so-called super-radiance (SR) regime of operation of a Cherenkov backward-wave oscillator (BWO) [1][2][3][4][5][6][7][8][9]. It is well-known that if the length of the electron-wave interaction region of a BWO significantly exceeds the starting threshold, then the transient process of excitation of the oscillator includes excitation of a short powerful rf pulse [1].…”

Section: Introductionmentioning

confidence: 99%