2021/04/29 by Zi‐Chao Gao, Chao‐Hai Du, Gao, Zi-Chao +7
Engineering · Environmental Science · Physics and Astronomy · #FOS: Physical sciences #Gyrotron and Vacuum Electronics Research #Insects and Parasite Interactions #Microwave Engineering and Waveguides #Plasma Physics (physics.plasm-ph)
paper · pdf · doi:10.48550/arxiv.2104.14108
openalex publication_date 2021/04/29 · openalex created_date 2021/05/10 · openalex updated_date 2026/07/28
Among the most promising terahertz (THz) radiation devices, gyrotrons can generate powerful THz-wave radiation in an open resonant structure. Unfortunately, such an oscillation using high-Q axial mode has been theoretically and experimentally demonstrated to suffer from strong ohmic losses. In this paper, a solution to such a challenging problem is to include a narrow belt of lossy section in the interaction circuit to stably constitute the traveling wave interaction (high-order-axial-mode, HOAM), and employ a down-tapered magnetic field to amplify the forward-wave component. A scheme based on the traveling-wave interaction concept is proposed to strengthen electron beam-wave interaction efficiency and simultaneously reduce the ohmic loss in a 1-THz third harmonic gyrotron, which is promising for further advancement of high-power continuous-wave operation.