研究了回旋管單陽極磁控注入環形電子注電子槍的設計計算原理。并以8 mm三次諧波永磁包裝回旋振蕩管電子槍為例，利用自編的程序進行數值計算和優化。討論了空間電荷的影響和速度零散的改善，得到最佳的電極和電子注參數。電子槍已經應用于8 mm三次諧波永磁包裝回旋振蕩管研制中。得到了良好的效果。
關 鍵 詞 回旋管; 電子注; 電子槍; 數值計算

Abstract The design and calculation elements of the single anode magnetron injection gun for gyrotron is researched. with 8 mm and the third-harmoric gyrotron of the casing by the permanent magnet for examples. The Numerical calculation and optimization is carried out by use of an self-redact electron trajectory code, The space charge effects and the velocity spreads is discussed. Lastly, The optimal parameters with electrode shapes and electronic trajectory was obtained. The single anode magnetron injection gun was employed experiments and researches for 8 mm and the third-harmoric gyrotron of the casing by the permanent magnet . The results was all right.
Key words gyrotron; electron bunchl; electron gun; numerical calculation