Linear analysis of a helix traveling wave tube filled with plasma

Author

Hong-Quan, Xie ; Cheng-Yue, Li ; Yang, Yan ; Sheng-Gang, Liu

Author_Institution

Inst. of High Energy Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2002

fDate

17-19 Aug. 2002

Firstpage

122

Lastpage

125

Abstract

A helix type slow wave structure filled partially with plasma is immersed in a strong longitudinal magnetic field. By means of a sheath model and linear field theory, the dispersion relation of the slow wave structure is derived. The hybrid modes, which are formed at frequencies where the phase velocities of electromagnetic wave and electrostatic wave coincide, are found. The trend of change for the dispersion characteristic, interaction impedance and linear gain is analyzed in different plasma densities by numerical computation. Some useful results are obtained on the basis of the discussion.

Keywords

dispersion relations; numerical analysis; plasma electromagnetic wave propagation; plasma filled waveguides; slow wave structures; travelling wave tubes; dispersion relation; electromagnetic wave; electrostatic wave; helix traveling wave tube; helix type slow wave structure; hybrid modes; interaction impedance; linear analysis; linear field theory; linear gain; numerical computation; phase velocities; plasma densities; plasma filled TWT; sheath model; strong longitudinal magnetic field; Dispersion; Electromagnetic scattering; Electrostatics; Frequency; Gain; Impedance; Magnetic analysis; Magnetic fields; Plasma sheaths; Plasma waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002. 2002 3rd International Conference on

Print_ISBN

0-7803-7486-X

Type

conf

DOI

10.1109/ICMMT.2002.1187650

Filename

1187650