Investigations of electron beam characteristics using an accelerator based on a magnetron gun with a secondary-emission cathode

The article presents the results of research and calculations on the formation of a radial electron beam by a magnetron gun with a secondary emission cathode in the electron energy range 35...65 keV and measuring its parameters during transportation in the total decreasing magnetic field of thesolenoid and the stray field of permanent magnets. The beam was transported in a system consisting of copper rings with an inner diameter of 66 mm,located at a distance of 85 mm from the exit of the magnetron gun. The dependence of the beam current on the amplitude and gradient of the fielddecay has been studied. The studies carried out have shown the possibility of stable formation of a radial electron beam with an energy of tens of keVin the decreasing magnetic field of the solenoid. By optimizing the distribution of the magnetic field (created by the solenoid and ring magnets) and itsdecay gradient, it is possible to achieve an increase in the incident of electrons on one ring (up to ~72% of the beam current). On the basis of themathematical model of the movement of the electron flow, a software tool has been synthesized that makes it possible to obtain and interpret thecharacteristics of the resulting flows. The obtained numerical dependences are in satisfactory agreement with the experimental results for a magneticfield with a large decay gradient. Various configurations of the magnetic field are considered. Solutions to the direct problem of modeling electrontrajectories for given initial conditions and parameters are obtained. Various configurations of the magnetic field are considered. It is shown that forthe selected initial conditions for the electron beam and the distributions of the longitudinal magnetic field along the axis of the gun and the transportchannel, the electron flux falls on a vertical section, the length of which is on the order of a millimeter. Thus, by changing the amplitude anddistribution of the magnetic field, it is possible to control the current in the radial direction along the length of the pipe, and, therefore, the place of theelectron irradiation.

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Modes Of Electron Beam Generation in a Magnetron Diode with a Secondary-Emission Cathode

Proceedings of the 2005 Particle Accelerator Conference ◽

10.1109/pac.2005.1590997 ◽

2006 ◽

Author(s):

A.N. Dovbnya ◽

N.G. Reshetnyak ◽

V.V. Zakutin

Keyword(s):

Electron Beam ◽

Secondary Emission ◽

Electron Beam Generation ◽

Beam Generation ◽

Magnetron Diode ◽

Emission Cathode

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

IEEE Transactions on Electron Devices ◽

10.1109/ted.2016.2519453 ◽

2016 ◽

Vol 63 (4) ◽

pp. 1704-1709 ◽

Cited By ~ 2

Author(s):

Nicolay I. Aizatsky ◽

Gennadiy I. Churyumov ◽

Anatoliy N. Dovbnya ◽

Valeriy V. Zakutin ◽

Nikolay G. Reshetnyak ◽

...

Keyword(s):

Electron Beam ◽

Secondary Emission ◽

Tubular Electron Beam ◽

Cold Metal ◽

Emission Cathode

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Increasing accelerator electron beam current based on magnetron gun with secondary-emission cathode

Physics of Particles and Nuclei Letters ◽

10.1134/s1547477110070320 ◽

2010 ◽

Vol 7 (7) ◽

pp. 572-576

Author(s):

A. N. Dovbnya ◽

V. V. Zakutin ◽

N. G. Reshetnyak ◽

M. I. Ayzatsky ◽

V. N. Boriskin ◽

...

Keyword(s):

Electron Beam ◽

Beam Current ◽

Secondary Emission ◽

Electron Beam Current ◽

Emission Cathode

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ELECTRON BEAM TRANSVERSION MANAGEMENT ON EXIT OF MAGNETIC GUN BY GRADIENT MAGNETIC FIELD

10.46813/2020-127-028 ◽

2020 ◽

pp. 28-32

Author(s):

A.S. Mazmanishvili ◽

N.G. Reshetnyak ◽

V.P. Romas’ko ◽

I.A. Chertishchev

Keyword(s):

Magnetic Field ◽

Electron Beam ◽

Experimental Studies ◽

Secondary Emission ◽

Experimental Results ◽

Beam Diameter ◽

Gradient Magnetic Field ◽

Transport Channel ◽

The Magnetic Field ◽

Emission Cathode

The results of experimental studies and modeling calculations for controlling the transverse dimensions of an electron beam formed by a magnetron gun with a secondary emission cathode are presented. In the gun, the secondary emission process is launched by a voltage pulse with an amplitude of up to 15 kV supplied to its anode. The dependence of the radial dimensions of the electron beam on the amplitude and gradient of the magnetic field in the transport channel is investigated. It is shown that the obtained experimental results are consistent with the simulation results. The possibility of adjusting the beam diameter by varying the configuration of the magnetic field is established. The experimental results presented indicate the possibility of realizing irradiation of the outer surface of cylindrical samples placed in the region of the gradient magnetic field.

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