Dynamics of mode competition in the gyrotron backward-wave oscillator.
The axial modes of the gyrotron backward-wave oscillator (gyro-BWO) each exhibit a distinctive asymmetry in axial field profile. As a result, and in sharp contrast to the behavior of the familiar resonator-based gyrotron oscillator, particle simulations of the gyro-BWO reveal a radically different pattern of mode competition in which a fast-growing and well-established mode is subsequently suppressed by a later-starting mode with a more favorable field profile. This is verified in a Ka-band experiment and the interaction dynamics are elucidated with a time-frequency analysis.
Pao
K F
KF
Department of Physics, National Tsing Hua University, Hsinchu, Taiwan.
Chang
T H
TH
Fan
C T
CT
Chen
S H
SH
Yu
C F
CF
Chu
K R
KR