Experimental Study of High-Power Gyrotron Traveling-Wave Tube With Periodic Lossy Material Loading

Author

Wang, Efeng ; Zeng, Xu ; Liu, Bentian ; Qian, Lijun ; Li, Zhiliang ; Feng, Jinjun ; Zhu, Shiqiu

Author_Institution

Vacuum Electron. Nat. Lab., Beijing Vacuum Electron. Res. Inst., Beijing, China

Volume

40

Issue

7

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

1846

Lastpage

1853

Abstract

The distributed wall loss is a good approach for the suppression of spurious oscillations in gyrotron traveling-wave tube (gyro-TWT). The periodic lossy dielectric loading in the interaction region of gyro-TWT can effectively suppress the spurious oscillations. We designed and employed a periodic lossy-material-loaded circuit in our experimental study of TE_01 Ka-band gyro-TWT. The output characteristics were greatly improved. A peak output power of 290 kW was measured with 56-dB maximum gain, 34.2% efficiency, and 2.1-GHz 3-dB bandwidth when the accelerating voltage was 66 kV and beam current was 13 A.

Keywords

gyrotrons; travelling wave tubes; bandwidth 2.1 GHz; current 13 A; distributed wall loss; gain 56 dB; gyro-TWT; high-power gyrotron traveling-wave tube; periodic lossy dielectric loading; periodic lossy material loading; power 290 kW; spurious oscillations; voltage 66 kV; Couplers; Gyrotrons; Loss measurement; Materials; Mcrowave amplifiers; Oscillators; Power generation; Superconducting magnets; Broad band; gyrotrons; high-power microwave amplifiers; periodic lossy material loading;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2012.2196289

Filename

6204347