Open AccessInvestigation on a long pulse relativistic extended interaction cavity oscillator
Author(s) -
Huang Hua,
Xiong Luo,
Lei Lurong,
Luo Guangyao,
Beizhen Zhang,
Jin Xiao,
Tan Jie
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.1907
Subject(s) - physics , full width at half maximum , pulse (music) , microwave , pulse width modulation , optics , cathode ray , pulse repetition frequency , electron , atomic physics , pulsed power , pulse duration , effective radiated power , power (physics) , radiation , laser , telecommunications , nuclear physics , quantum mechanics , radar , detector , computer science
The mechanism of modulation and rf extraction of an S-band on an injection locked, long pulse, relativistic extended interaction cavity oscillator REICO is studied in this paper by experiment, theory, and simulation. The origin of pulse shortening and mode competition of the REICO driven by the long pulse intense relativistic electron beams IREBs is explored. The modified structure of REICO with coupler is proposed for the first time, which suppresses the pulse shortening and mode competition remarkably. The pulse width of the modulated IREB is increased from 60 ns to 140 ns, and the magnitude of the modulated IREB is increased from 2 kA to 5 kA. The microwave radiation power and efficiency are promoted obviously after adjusting the parameters of the IREB and the leading magnetic field. Using a 580 kV, 48 kA, 210 ns electron beam with 11 T leading magnetic field, more than 400MW radiated power was extracted in 160 ns FWHM pulses at 289 GHz. The power efficiency is 27%, and the energy efficiency is 23%. The radiated power is 400 MW and the FWHM pulse is 184 ns when pulse repetition frequency of IREBs is 20 Hz. The experimental results are well consistent with the simulations. The injection locked REICO generates high power microwave of power 400 MW with pulse width 100 ns.