Study of a Novel Bidirectional Compression Electron Gun for W -Band Sheet Beam TWT

Study of a Novel Bidirectional Compression Electron Gun for W -Band Sheet Beam TWT

A novel bidirectional compression electron gun is designed for a W-band sheet beam traveling-wave tube. A parabolic curved cathode and a beam focusing electrode based on spline interpolation curves are proposed to obtain a beam with good quality. Two directional compressions are introduced to reduce...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on plasma science Vol. 45; no. 5; pp. 805 - 810
Main Authors: Yang, Liusha, Wang, Jianxun, Li, Hao, Jiang, Wei, Dong, Kun, Luo, Yong
Format: Journal Article
Language:English
Published: IEEE 01-05-2017
Subjects:
Anodes
Beam emittance
bidirectional compression
Cathodes
Electron beams
electron gun
Electron guns
Focusing
Optimization
sheet beam
Splines (mathematics)
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel bidirectional compression electron gun is designed for a W-band sheet beam traveling-wave tube. A parabolic curved cathode and a beam focusing electrode based on spline interpolation curves are proposed to obtain a beam with good quality. Two directional compressions are introduced to reduce the beam loading of cathode. A 30-kV, 0.97-A beam is emitted by a curved 0.112-cm 2 cathode with a beam loading of 8.66 A/cm 2 . The beam at waist position is 1.4 mm × 0.4 mm with a compression ratio of 2 and 10 in two directions separately. Studies of beam emittance and sensitivity of beam dynamics to mechanical errors are also carried out to understand the influence of structure parameters on electron gun performance.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2017.2688480