Generation and Formation of Axially Symmetrical Tubular Electron Beam in a Cold Metal Secondary-Emission Cathode Magnetron Gun—Part I: Experiment

Aizatsky, N.I.; Churyumov, G.I.; Dovbnya, A.; Zakutin, V.V.; Reshetnyak, N. G.; Starchevskiy, Y.L.

doi:10.1109/ted.2016.2519453

Cited by 3 publications

(4 citation statements)

References 7 publications

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“…In order to improve the magnetron operation, there conducted active investigations of new effective cathode materials and cathode node constructions, providing high durability and emission stability. It especially concerns investigations connected with applying the cold secondaryemission cathodes providing virtually instant readiness and nonfilament ("cold") start of magnetrons [22,[24][25][26][27][28].…”

Section: Magnetronmentioning

confidence: 99%

“…The state-of-the-art evolution of magnetrons is associated with increasing the frequency (phase) stability and rising the lifetime, as well as enhancing reliability due to an application of the cold cathodes [21,24,[26][27][28]. In particular, there is a significant interest in the development of magnetrons in the millimeter range.…”

Section: The Surface Wave Magnetronsmentioning

confidence: 99%

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Vacuum Microwave Sources of Electromagnetic Radiation

Churyumov¹,

Qiu²,

Wang³

2019

Electromagnetic Fields and Waves

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This chapter contains new simulation results concerning the physical foundations of how microwave tubes operate based on Cherenkov's mechanism of radiation (interaction with slow electromagnetic wave) and some experimental results connected with improving the output characteristics of the magnetrons (a mm band surface wave magnetron and a magnetron with two RF outputs of energy), as well as results of computer modeling of a 320-GHz band traveling wave tube (TWT). The results of analytical calculations and computer modeling, a phase bunching process in the mm band surface wave magnetron, are considered. It is shown that the process of phase focusing has two features associated with a concentration of RF wave energy close to the vanes of an anode block and higher electron hub of a space charge as compared to the classical magnetrons. The features and examples of practical application of the magnetron with two RF outputs of energy are presented. It is shown that the main advantage of the magnetrons is its extended functionalities (for example, possibility of frequency tuning including electronic tuning of a frequency from a pulse to pulse). The presented materials will be of interest not only for starting researchers but also for those who have microwave tube experience.

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Section: Magnetronmentioning

confidence: 99%

Section: The Surface Wave Magnetronsmentioning

confidence: 99%

Vacuum Microwave Sources of Electromagnetic Radiation

Churyumov¹,

Qiu²,

Wang³

2019

Electromagnetic Fields and Waves

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“…The geometrical dimensions of the magnetron gun interaction space correspond to those of prototype No 1 [1]. The induction value of the longitudinal uniform magnetic field was chosen to be B 0 = 0.3 T. An idealized shape of the voltage pulse U (t) has the characteristic portions, including the pulse front (0 ≤ t < t 1 ), the first portion of the voltage falling (t 1 ≤ t < t 2 ), the stationary portion corresponding to the pulse ledge (t 2 ≤ t < t 3 ), and a droop of the pulse (the second portion of the voltage falling) (t 3 ≤ t < t 4 ).…”

Section: A Statement Of the Problemmentioning

confidence: 99%

“…T HE results of the experimental investigations presented in Part I indicate a possibility of generation of the axially symmetrical tubular electron beam in a cold metal secondary-emission cathode magnetron gun [1]. The necessary and sufficient conditions of such generation are the application of a switching supply power (modulator) that shapes the anode voltage pulses having the voltage falling portions on their fronts.…”

mentioning

confidence: 99%

Generation and Formation of Axially Symmetrical Tubular Electron Beam in a Cold Metal Secondary-Emission Cathode Magnetron Gun—Part II: Computer Modeling

Aizatsky

Churyumov

Dovbnya

et al. 2016

IEEE Trans. Electron Devices

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This paper presents the computer modeling results, explaining the generation mechanism of periodical electron bunches in a cold cathode metal secondary-emission magnetron gun and describes a scenario of the secondary-emission electron multiplication at the front and droop portions of the anode voltage pulse. An analytical model for analyzing the kinematical characteristics of the formed electron cloud and a self-consistent numerical mathematical model on the basis of the particle-in-cell method for studying the collective electron processes have been developed. The general stages of forming the electron beam in the cold cathode secondary-emission magnetron gun are shown. It is shown that an efficiency of secondary-electron multiplication depends on the shape and parameters of the high-voltage pulse. The obtained results of the computer modeling are in good agreement with the experimental data.Index Terms-Cold metal cathode, computer modeling, crossed-field gun, field emission, secondary-electron emission, tubular electron beam.

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