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A Sheet Beam Electron Gun With High Compression Ratio and Long Transmission Distance Performance for W-Band TWT Applications
- Source :
- IEEE Transactions on Plasma Science. 49:734-741
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- A sheet beam electron gun with high compression ratio and long transmission distance performance for $W$ -band traveling-wave tube (TWT) is presented. A beam focusing electrode (BFE) with two pairs of unequal length outstretched structures is designed to provide equal positions of beam waist in both horizontal and vertical planes, which is beneficial to obtain large compression ratio and keep the beam cross section shape over a long distance. The operational voltage is set as 30 kV. The beam current is 0.505 A, and the corresponding cathode current density is about 5.59 A/cm2. The simulation results show that the electron gun can provide a stable sheet beam under a 0.85-T magnet field. The compression ratio of the obtained sheet beam can be over 35, and the sheet beam can be transported through a 126-mm beam tunnel without interception with a 0.6 fill factor. The parameter sensitivities of the gun are analyzed and discussed as well.
- Subjects :
- Nuclear and High Energy Physics
Materials science
business.industry
Condensed Matter Physics
01 natural sciences
Cathode
010305 fluids & plasmas
law.invention
Optics
W band
law
Magnet
0103 physical sciences
Electrode
Compression ratio
Physics::Accelerator Physics
business
Beam (structure)
Electron gun
Voltage
Subjects
Details
- ISSN :
- 19399375 and 00933813
- Volume :
- 49
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Plasma Science
- Accession number :
- edsair.doi...........fc69a0f96cfa3ad2f766dcce249a23f0