Reduction of noise factor in TWT with a convergent electron beam

Author

Danilov, A.B. ; Morev, S.P. ; Rafalovich, A.D.

Author_Institution

Fed. State Unitary Enterprise, Saratov, Russia

fYear

2003

fDate

28-30 May 2003

Firstpage

372

Lastpage

373

Abstract

This article describes the results of the work on reducing the noise factor submitted by means of choice the parameters of EOS for broadband traveling wave tube (TWT) with output level 100 W. For reduction the noise factor in this TWT has been increased at a sacrifice of the diameter of the cathode. Thus the amplitude of the magnetic field necessary for focusing the beam of a former has decreased. If P_input is greater than zero (P_input - output power), a noticeable dynamic defocusing took place (body current is greater than 10 mA). The dynamic defocusing has been suppressed due to the 1,2 times increase of the magnetic field at the end of the interaction space. The amplitude of the magnetic field was calculated. If the output power is equal to zero, the body current and the noise factor have not increased.

Keywords

electron device noise; travelling wave tubes; 100 W; TWT; broadband traveling wave tube; convergent electron beam; magnetic field; noise factor reduction; Cathodes; Electron beams; Frequency; Low-frequency noise; Magnetic field measurement; Magnetic noise; Noise level; Noise reduction; Power generation; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics, 2003 4th IEEE International Conference on

Print_ISBN

0-7803-7699-4

Type

conf

DOI

10.1109/IVEC.2003.1286401

Filename

1286401