内导体倾斜的内开槽同轴回旋管

Corrugated coaxial gyrotron with tilted inner conductor

同轴回旋管中不可避免发生内导体倾斜。主要研究了内导体倾斜对特征根、Q值、谐振频率、横向电场、模式竞争和电子效率的影响,并以170GHz TE31,12内开槽同轴回旋管作为实例对内导体倾斜理论进行验证。结果表明,特征根和Q值随倾角θ增大而略微增加。在0～0.5°范围内,当θ稍微增大时,电子互作用效率稍微减少。如果θ增加到1.3°,则由于模式竞争严重,且横向电场畸变严重,电子互作用效率降低到只有5%。受内导体倾斜的影响,随着θ增加,无论热腔还是冷腔,谐振频率都稍微增大。

The tilt of inner conductor unavoidably occurs in coaxial gyrotrons. The effects of tilted inner conductor on eigenvalue, quality factor Q , resonant frequency, transverse electric field, mode competition and electronic efficiency are presented. The theory is illustrated in a 170 GHz TE 31,12 corrugated coaxial-gyrotron. The results indicate that eigenvalue and quality factor Q increase slightly when the tilt angle θ of inner conductor increases. However, within the range of 0-0.5°, the electronic efficiency decreases slightly when θ grows. If θ increases to 1.3°, the efficiency of beam-wave interaction reduces to 5% because mode competition becomes serious and the transverse electric field is distorted severely. Effected by the tilted inner conductor, the resonant frequency of cavity increases slightly with θ rising.