The RADAN series of compact pulsed power Generators and their applications

Mesyats, G.; Korovin, S. D.; Rostov, V. V.; Shpak, V. G.; Yalandin, M. I.

doi:10.1109/jproc.2004.829005

Cited by 146 publications

(33 citation statements)

References 25 publications

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“…4; a, b) demonstrates such capability of phase imposing. Experiments were performed using two precisely synchronized electron accelerators RADAN [7] where SR BWO served as a master oscillator. Both quasi-stationary and superradiative Ka-band BWOs were explored in this regime as a driven oscillator.…”

Section: Figmentioning

confidence: 99%

Relativistic microwave oscillators with high power flux in a free space and interaction zone

et al. 2017

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In the recent two decades, high-power microwave (HPM) generators producing short Ka-band and X-band pulses were intensively investigated (see and citation therein). For generation of HPM pulses with duration of units of nanosecond and less influence of microwave breakdowns of electrodynamics systems, expansion of cathode and collector plasmas, and electron beam structure distortions becomes insignificant. Though the pulse duration is short, the radiating energy rises if coherent summation of radiation from several generators is provided. When the power in each channel is high, the wave beam could be formed where power flux density is limited only by breakdown strength of the media. Using approaches of the phased arrays, the directional pattern (DP) of summarized radiation could be steered. This is achievable from pulse to pulse, as well as during a single nanosecond pulse if summarized wave beams have a shifted frequencies. The related experiments with Kaband microwave pulses are presented below.Super-powerful microwave pulses containing about ten oscillations could be formed in the mode of Cherenkov superradiance (SR) of electron flux propagating in elongated slow-wave structure (SWS) [1]. As a result of a single-pass, high gain amplification of initial electromagnetic (EM) perturbation, the power of SR pulse may exceed the power of the driving beam [2]. This is also because of SR pulse is shorter than the electron beam (in space) and less than its propagation time throughout the entire SWS. If the interaction with following slow wave continuous, the beam energy transfer to SR occurs due to the wave-to-particles slippage [1]. For the case of counter wave (backward synchronous harmonic) SR pulse accumulates the energy from incoming "fresh" electrons [3].Beam-to-wave power conversion factor K = (1-1.4) was obtained for relativistic superradiance Ka-band backward-wave oscillators (BWOs) [1--3]. In the recent experiments [4], voltage pulses ( Fig. 1; a, b) applied to explosive electron emission (EEE) cathode formed electron beams with power of ~ 2-3 GW. This was sufficient to excite a 29-GHz SR pulse (Fig. 1, c) with K~1. It was revealed that in the presence of high electric fields at the SWS wall ( 2 | E MV/cm) arise breakdowns. However, rf power limitation was delayed enough to ensure SR pulse passage throughout the entire SWS. Electric field of ~1 MV/cm was achieved in quasi-stationary (QS) BWO having the SWS two times shorter than SR oscillator. This QS BWO generated 2-ns pulse with power of 0.6 GW. Figure 2 demonstrates, that both SR and QS oscillators have (from shot to shot) generation phases linked to the voltage pulse front (Fig. 1, a) at the point of maximum derivative by time. Obviously, the faster rise time of the beam current (that correlates with the voltage front steepness), the stronger a wideband, phase-imposing seed EM perturbation is formed, when the beam is injected into SWS. One can see (Fig. 2) that SR oscillator demonstrates a fewer phase spread as compared to QS BWO. Apparently, this is the...

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Section: Figmentioning

confidence: 99%

Relativistic microwave oscillators with high power flux in a free space and interaction zone

et al. 2017

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“…Возможность анализа непосредственно в лабораторной системе достигается за счет учета временной производной ∂p ⊥, /∂τ в левых частях уравнений движения [11], что позволяет корректно описать конечность скорости поступательного движения сгустка и представить условия группового синхронизма с рабочей модой в виде graz = 1/g 2 0 . В моделировании были использованы параметры электронных сгуст-ков, которые могут быть сформированы на основе сильноточного уско-рителя RADAN [12]: энергия частиц 250 keV, ток 0.4 kA, длительность сгустка 300 ps. Предполагается, что сгусток вращающихся электронов RADAN, излучение будет состоять из последовательности нескольких импульсов СИ.…”

Section: поступило в редакцию 18 мая 2017 гunclassified

Генерация Ультракоротких Импульсов Субтерагерцевого И Терагерцевого Диапазонов На Основе Эффекта Циклотронного Сверхизлучения

Розенталь¹,

Гинзбург²,

Зотова³

et al. 2017

Письма В Журнал Технической Физики

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В рамках усредненного описания электронно-волнового взаимодействия, а также на основе прямого моделирования PIC (particle in cell) показана возможность генерации ультракоротких импульсов субтерагерцевого и терагерцевого диапазонов с использованием циклотронного механизма сверхизлучения (СИ) сгустков электронов, движущихся по винтовым траекториям в однородном магнитном поле. В условиях существенной сверхразмерности волноводного тракта селективное возбуждение рабочей моды обеспечивается при движении электронного сгустка с поступательной скоростью, близкой к групповой скорости излучаемого импульса СИ. DOI: 10.21883/PJTF.2017.18.45030.16878

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“…The "RADAN" series pulse generators shown in Fig. 7 are portable repetitive high-power pulsers made in Russia for X-ray radiography [16]. The "RADAN" pulser which consists of Tesla transformer and PFL are also based on the HES mode shown in Fig.…”

Section: Applications Of Hes Based On Pulse Transformer Chargingmentioning

confidence: 99%

“…In applications, a lot of facilities can be simplified as the HES module including two capacitors and a transformer shown in Fig. 2 [9][10][11][12][13][14][15][16]. Switch S1 has ability of closing and opening at different time.…”

mentioning

confidence: 99%

Hybrid Energy Storage and Applications Based on High Power Pulse Transformer Charging

Liu¹

2013

Energy Storage - Technologies and Applications

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The RADAN series of compact pulsed power Generators and their applications

Cited by 146 publications

References 25 publications

Relativistic microwave oscillators with high power flux in a free space and interaction zone

Relativistic microwave oscillators with high power flux in a free space and interaction zone

Генерация Ультракоротких Импульсов Субтерагерцевого И Терагерцевого Диапазонов На Основе Эффекта Циклотронного Сверхизлучения

Hybrid Energy Storage and Applications Based on High Power Pulse Transformer Charging

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