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Title: A novel Ka-band coaxial transit-time oscillator with a four-gap buncher

Abstract

A novel Ka-band coaxial transit-time oscillator (TTO) with a four-gap buncher is proposed and investigated. Simulation results show that an output power of 1.27 GW and a frequency of 26.18 GHz can be achieved with a diode voltage of 447 kV and a beam current of 7.4 kA. The corresponding power efficiency is 38.5%, and the guiding magnetic field is 0.6 T. Studies and analysis indicate that a buncher with four gaps can modulate the electron beam better than the three-gap buncher in such a Ka-band TTO. Moreover, power efficiency increases with the coupling coefficient between the buncher and the extractor. Further simulation demonstrates that power efficiency can reach higher than 30% with a guiding magnetic field of above 0.5 T. Besides, the power efficiency exceeds 30% in a relatively large range of diode voltage from 375 kV to 495 kV.

Authors:
; ;  [1]
  1. College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)
Publication Date:
OSTI Identifier:
22410334
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM BUNCHERS; BEAM CURRENTS; COMPUTERIZED SIMULATION; ELECTRIC POTENTIAL; ELECTRON BEAMS; ENERGY EFFICIENCY; GHZ RANGE; MAGNETIC FIELDS; OSCILLATORS

Citation Formats

Song, Lili, He, Juntao, and Ling, Junpu. A novel Ka-band coaxial transit-time oscillator with a four-gap buncher. United States: N. p., 2015. Web. doi:10.1063/1.4919961.
Song, Lili, He, Juntao, & Ling, Junpu. A novel Ka-band coaxial transit-time oscillator with a four-gap buncher. United States. doi:10.1063/1.4919961.
Song, Lili, He, Juntao, and Ling, Junpu. Fri . "A novel Ka-band coaxial transit-time oscillator with a four-gap buncher". United States. doi:10.1063/1.4919961.
@article{osti_22410334,
title = {A novel Ka-band coaxial transit-time oscillator with a four-gap buncher},
author = {Song, Lili and He, Juntao and Ling, Junpu},
abstractNote = {A novel Ka-band coaxial transit-time oscillator (TTO) with a four-gap buncher is proposed and investigated. Simulation results show that an output power of 1.27 GW and a frequency of 26.18 GHz can be achieved with a diode voltage of 447 kV and a beam current of 7.4 kA. The corresponding power efficiency is 38.5%, and the guiding magnetic field is 0.6 T. Studies and analysis indicate that a buncher with four gaps can modulate the electron beam better than the three-gap buncher in such a Ka-band TTO. Moreover, power efficiency increases with the coupling coefficient between the buncher and the extractor. Further simulation demonstrates that power efficiency can reach higher than 30% with a guiding magnetic field of above 0.5 T. Besides, the power efficiency exceeds 30% in a relatively large range of diode voltage from 375 kV to 495 kV.},
doi = {10.1063/1.4919961},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 22,
place = {United States},
year = {2015},
month = {5}
}