Nonlinear Simulation of a Cyclotron Autoresonance Maser (CARM) Operating in a Transverse Magnetic Mode |
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Authors: | Bing-Fu Liu Shi-Chang Zhang |
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Affiliation: | (1) Institute of Photoelectronics, School of Information Science and Technology, Southwest Jiaotong University, Campus Mail Box 50, Chengdu, Sichuan, 610031, People’s Republic of China; |
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Abstract: | In the gyrotron operation, the transverse-magnetic (TM) mode is excluded because the TM mode instability vanishes when the vacuum waveguide mode and the beam mode are at grazing incidence. However, situation changes in a cyclotron autoresonance maser (CARM) interaction. In this paper nonlinear formulation of a TM-mode CARM is derived, and detailed simulations are presented for the TM1,1-mode CARM. Simulation results show that a TM1,1-mode CARM can reach high power of megawatts and ultrahigh gain of more than 70 dB, as a TE1,1-mode gyrotron traveling wave tube (gyro-TWT) and TE1,1-mode CARM did in the reported experiments. |
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