Open AccessInvestigation and suppression of pulse shortening problem caused by non-working mode self-excitation in an S-band long pulse relativistic klystron amplifier
Author(s) -
Zhaofu Chen,
Huang Hua,
Chang Anbi,
Xu Zhou,
Han Hu,
Lei Lurong,
Hu Jin-Guang,
Huatang Yuan,
Zhenbang Liu
Publication year - 2014
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.63.238402
Subject(s) - klystron , amplifier , pulse (music) , excitation , physics , power (physics) , coupling (piping) , mode (computer interface) , optics , pulse width modulation , pulsed power , optoelectronics , materials science , computer science , quantum mechanics , cmos , detector , metallurgy , operating system
We have investigated the pulse shortening problem of relativistic klystron amplifier. It is shown that non-working mode self-excitation is an important cause of pulse shortening. Theoretical and numerical analyses show the mechanism of non-working mode self-excitation caused by the coupling between cavities. By the use of radio frequency absorbers, the problem of non-working mode self-excitation can be solved. In the experiment, the RF output power is 920 MW, the output power pulse width of the device can be increased from 77 ns to 137 ns.