Russian Gyrotrons: Achievements and Trends

Litvak, A. G.; Денисов, Г. Г.; Glyavin, M. Yu.

doi:10.1109/jmw.2020.3030917

Cited by 78 publications

(17 citation statements)

References 61 publications

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“…Electron cyclotron masers (including gyrotrons) are the most powerful sources of coherent radiation at sub-terahertz frequencies [1][2][3][4][5]. Currently, such sources, when operating in the sub-terahertz frequency range (that is, at frequencies from 0.3 to 1 THz), are capable of generating power at the levels of 10 2 -10 3 watts in the continuous generation regime and up to 10 5 watts in relatively long (microseconds and longer) pulsed regimes.…”

Section: Introductionmentioning

confidence: 99%

Klystron-like Cyclotron Amplification of a Transversely Propagating Wave by a Spatially Developed Electron Beam

2022

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A klystron-like gyro-amplifier based on the excitation of a wave propagating across a spatially developed (in the transverse direction) electron beam is described within the simplest 2-D model. Such a configuration is attractive as a way of implementation of a short-wavelength source with a relatively high level of output power and with the possibility of quasicontinuous frequency tuning. We study the peculiarities of the 2-D process (developing in both the axial and transverse directions) of electron bunching and “free” wave emission from the electron beam in the open drift space, as well as the excitation of the output cavity used to provide formation of a compact and powerful output wave signal. The main problem of this 2-D process is that different fractions of the electron beam (located at different points of its cross-section) move in different wave fields. In addition, excitation of the parasitic wave propagating in the opposite direction relative to the operating wave is possible. However, we show that it is possible to organize effective electron–wave energy exchange for almost all fractions of the electron beam.

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Section: Introductionmentioning

confidence: 99%

Klystron-like Cyclotron Amplification of a Transversely Propagating Wave by a Spatially Developed Electron Beam

2022

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“…В субмиллиметровом диапазоне использование систем квазиоптической фокусировки электромагнитного излучения позволяет локализовать область поддержания разряда до размеров порядка длины волны и тем самым обеспечить высокий удельный энерговклад в плазму [5]. Электронная плотность в таких разрядах близка к критической для данной частоты греющего поля, а температурные характеристики плазмы имеют существенно неравновесное распределение [6]. Уникальные плазменные параметры субтерагерцевых разрядов делают их перспективными неравновесными средами для решения современных плазмохимических задач, особенно в тех приложениях, где необходимо эффективно разрушать молекулы с высокой энергией межатомных связей [2].…”

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Разложение Углекислого Газа В Разряде, Поддерживаемом Непрерывным Сфокусированным Субтерагецевым Излучением При Атмосферном Давлении

Синцов¹,

Мансфельд²,

Веселов³

et al. 2023

Письма В Журнал Технической Физики

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For the first time, experiments were carried out on the decomposition of carbon dioxide in a plasma torch maintained by continuous focused gyrotron radiation with a frequency of 263 GHz in an argon flow at atmospheric pressure. It is shown that, despite the decrease in the electron density by a factor of 5, when 3% carbon dioxide is added to the plasma-forming gas, it is possible to achieve its degree of conversion of 22% due to the nonequilibrium nature of maintaining the discharge. Thus, the prospects of using high-power electromagnetic radiation in the sub-terahertz range for solving plasma-chemical problems of the decomposition of highly stable molecules have been demonstrated. Keywords: microwave discharge, nonequilibrium plasma, gyrotron, subterahertz radiation, CO2 decomposition.

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“…Recently, we have at our disposal a new unique 527 GHz gyrotron, which provides an output power of up to 240 W in both CW and pulsed modes [11]. The nominal operating parameters of the tube are an accelerating voltage of 15 kV and an electron beam current of 600 mA.…”

mentioning

confidence: 99%

Production of highly dispersed powders of metal-oxides by evaporation-condensation technique when heated by focused radiation of terahertz-range gyrotron setup

Цветков

Vodopyanov

Mansfeld

et al. 2022

J. Phys.: Conf. Ser.

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The paper describes the experimental setup and some results of experiments on the production of highly dispersed metal oxides powders using the example of tungsten trioxide WO3 by the evaporation-condensation method when the initial material is heated by focused radiation of 0.53 THz / 240 W gyrotron. By focusing the gyrotron radiation, it was possible to achieve an intensity of several kW/cm2 on the surface of the evaporated initial sample. The use of a system with a rotating crucible made it possible to increase the evaporation rate of the substance by 3–4 times, which is very important in conditions of a lack of power.

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Russian Gyrotrons: Achievements and Trends

Cited by 78 publications

References 61 publications

Klystron-like Cyclotron Amplification of a Transversely Propagating Wave by a Spatially Developed Electron Beam

Klystron-like Cyclotron Amplification of a Transversely Propagating Wave by a Spatially Developed Electron Beam

Разложение Углекислого Газа В Разряде, Поддерживаемом Непрерывным Сфокусированным Субтерагецевым Излучением При Атмосферном Давлении

Production of highly dispersed powders of metal-oxides by evaporation-condensation technique when heated by focused radiation of terahertz-range gyrotron setup

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