A High-Efficiency Second-Harmonic Gyrotron with a Depressed Collector

Морозкин, М. В.; Glyavin, M. Yu.; Денисов, Г. Г.; Лучинин, А. Г.

doi:10.1007/s10762-008-9408-z

Cited by 23 publications

(7 citation statements)

References 11 publications

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“…Although the latter approach is hindered by severe mode competition and significantly lower efficiency, there is remarkable progress in the development of gyrotrons operating at high harmonics. They include second-harmonic conventional gyrotrons (utilizing helical electron beams with off-axis orbits) [27][28][29][30][31][32] as well as tubes based on advanced concepts such as LOG (large-orbit gyrotrons with axis-encircling aka uniaxial electron beams) [33][34][35] and double-beam gyrotron [36]. The highest frequencies achieved by the gyrotrons have already passed the symbolic threshold value of 1 THz.…”

Section: Advantages Of the Gyrotrons As Powerful Radiation Sources Fomentioning

confidence: 99%

The Gyrotrons as Promising Radiation Sources for THz Sensing and Imaging

et al. 2020

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The gyrotrons are powerful sources of coherent radiation that can operate in both pulsed and CW (continuous wave) regimes. Their recent advancement toward higher frequencies reached the terahertz (THz) region and opened the road to many new applications in the broad fields of high-power terahertz science and technologies. Among them are advanced spectroscopic techniques, most notably NMR-DNP (nuclear magnetic resonance with signal enhancement through dynamic nuclear polarization, ESR (electron spin resonance) spectroscopy, precise spectroscopy for measuring the HFS (hyperfine splitting) of positronium, etc. Other prominent applications include materials processing (e.g., thermal treatment as well as the sintering of advanced ceramics), remote detection of concealed radioactive materials, radars, and biological and medical research, just to name a few. Among prospective and emerging applications that utilize the gyrotrons as radiation sources are imaging and sensing for inspection and control in various technological processes (for example, food production, security, etc). In this paper, we overview the current status of the research in this field and show that the gyrotrons are promising radiation sources for THz sensing and imaging based on both the existent and anticipated novel techniques and methods.

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Section: Advantages Of the Gyrotrons As Powerful Radiation Sources Fomentioning

confidence: 99%

The Gyrotrons as Promising Radiation Sources for THz Sensing and Imaging

et al. 2020

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“…Reflected electrons can interact with high-frequency field, which, in principle, negatively affects the values of output power and electronic efficiency. Previous investigations show that the acceptable level of reflection from the collector can differ in different gyrotrons [5,[25][26][27] and ultimately be limited by 10 % [28].…”

Section: Trajectory Analysis Of Spent Heb In the Collector Regionmentioning

confidence: 99%

Simulation of high-efficiency gyrotron with the system of multistage energy recovery

Trofimov

Louksha

2019

ITM Web Conf.

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The results of simulations of helical electron beam formation and collecting, as well as high frequency wave-particle interaction processes, in the moderate-power experimental gyrotron with the frequency of 74.2 GHz are presented. Various methods of beam quality and electron efficiency improvement via optimization of electric and magnetic field distributions in the cathode region were realized. In the optimal operating regime with high pitch ratio and low velocity spread, the electron efficiency of about 46 % was calculated for the gyrotron with the magnetron injection gun including a control electrode and a cathode with sectioned emission. In the gyrotron collector region, a system of 4-stage electron energy recovery was used for enhancement of total efficiency of the device. By improving the quality of the electron beam and efficient energy recovery in the collector region, the total efficiency of the gyrotron equal to 71.8% was achieved.

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“…При выполнении траекторного анализа ВЭП в коллекторной области исследовалась возможность достижения [5,[29][30][31][32], и достигать примерно 10% [33]. В разработанной схеме рекуператора с азимутальным магнитным полем радиальный дрейф приводит к осаждению основной части отраженных электронов на задней стенке секций коллектора, что заметно снижает поток частиц, возвращающихся в резонатор [19].…”

Section: траекторный анализ отработанного вэп в коллекторной областиunclassified

Высокоэффективный Гиротрон С Многоступенчатой Рекуперацией Остаточной Энергии Электронов

Лукша¹,

Трофимов²

2019

Журнал Технической Физики

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The results of combined simulation of physical processes in a medium power gyrotron of 4-mm wavelength range are presented. The methods of improving the quality of helical electron beam and the electron efficiency of the gyrotron, based on the optimization of electric field distribution in the near-cathode region, are realized. The design of the collector with 4-stage recovery of residual beam energy, based on the method of spatial separation of electrons in crossed azimuthal magnetic and axial electric fields, was developed. The value of total efficiency of the gyrotron equal to 71.8 % was achieved by improving the quality of the electron beam and by efficient energy recovery in the collector region.

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A High-Efficiency Second-Harmonic Gyrotron with a Depressed Collector

Cited by 23 publications

References 11 publications

The Gyrotrons as Promising Radiation Sources for THz Sensing and Imaging

The Gyrotrons as Promising Radiation Sources for THz Sensing and Imaging

Simulation of high-efficiency gyrotron with the system of multistage energy recovery

Высокоэффективный Гиротрон С Многоступенчатой Рекуперацией Остаточной Энергии Электронов

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