TY  - JOUR
AU  - Zhang, X.
AU  - Chang, C.
AU  - Gimeno, B.
PY  - 2019
DA  - 2019//
TI  - Multipactor Analysis in Circular Waveguides Excited by TM01 Mode
T2  - IEEE Trans. Electron Devices
JO  - IEEE Transactions on Electron Devices
SP  - 4943
EP  - 4951
VL  - 66
IS  - 11
PB  - Ieee-Inst Electrical Electronics Engineers Inc
KW  - Circular waveguide
KW  - multipactor
KW  - ponderomotive force
KW  - TM01 mode
AB  - A series of detailed numerical simulations are used to investigate the properties ofmultipactor breakdown in circularwaveguidespropagating the TM01 mode. AMonte Carlo model is constructed to track the motion of the electrons, study the multipactor scenarios, and predict the multipactor thresholds. The theoretical and numerical analyses indicate that the product of the frequency and the gap (f . D) affects both the intensity of the ponderomotive force and its spatial distribution, which results from the nonuniformity of the radio frequency (RF) field and significantly influences the electrons' trajectoriesandmultipactor trends. The decrease in f . D results in a remarkable enhancement in the magnitude of the ponderomotive force, while the maximal intensity gradually moves toward the half radius R/2 area. Low values of f . D correspond to high ponderomotive potential, which sustains the short-range electrons and triggers the single-sidedmultipactor. In contrast, high values of f . D correspond to low ponderomotive potential, contributing to long-range electrons and exciting the double-sided multipactor. Fitting to the susceptibility diagram produces the border line and a modified f . D threshold of (f . D) th approximate to 338.4 GHz mm, which separates the susceptibility diagram into single-sided, double-sided, andmixed-sided zones. The initial electron energy influences their trajectories at high f . D and low RF power. This effect tends to dominate the multipactor behavior in the mixed-sided region.
SN  - 0018-9383
UR  - https://doi.org/10.1109/TED.2019.2941594
DO  - 10.1109/TED.2019.2941594
LA  - English
N1  - WOS:000494419900066
ID  - Zhang_etal2019
ER  -