Experimental study and numerical simulation of electron beam in gyrotron-type electron-optical systems

Author

Louksha, O.I. ; Sominski, G.G. ; Kas´yanenko, D.V.

Author_Institution

St. Petersburg State Tech. Univ., Russia

fYear

1999

fDate

36373

Firstpage

130

Lastpage

133

Abstract

The most widely used system of helical electron beam (HEB) formation for gyrotron applications includes a magnetron-injection gun (MIG) and magnetic compression region. In this system, it is necessary to take into account such specific phenomena as the reflection of electrons with large transverse velocities from magnetic mirror, the accumulation of the space charge in the trap between gun cathode and magnetic field plateau, the excitation of low-frequency "trap" oscillations, the electron bombardment of cathode surface. These phenomena have an effect on HEB quality and limit gyrotron parameters. In our paper, the results of experimental study and numerical simulation of physical processes accompanying HEB formation are summarized

Keywords

electron beams; electron optics; gyrotrons; cathode surface; electron bombardment; electron optical system; electron reflection; gyrotron; helical electron beam; magnetic compression; magnetic mirror; magnetron injection gun; nonuniform field; numerical simulation; space charge oscillation; trap; Cathodes; Current measurement; Electron beams; Electron emission; Electron traps; Gyrotrons; Magnetic field measurement; Magnetic fields; Numerical simulation; Space charge;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Radiophysics of Ultra-High Frequencies, 1999. International University Conference Proceedings

Conference_Location

St Petersburg

Print_ISBN

5-7422-0083-8

Type

conf

DOI

10.1109/UHF.1999.787898

Filename

787898