学术
摘 要:
带状注速调管可以在高频段实现高功率微波输出，电子光学系统是带状注速调管的关键部件。阐述了Wiggler双平面聚焦理论，设计了新型椭圆形柱面阴极和椭圆形聚焦极结构，阴极曲率半径为17mm，长轴10mm，短轴4mm；聚焦极长轴28．8mm，短轴10．4mm。采用这种结构可以直接产生椭圆形带状电子注，且阴极发射电流密度较为均匀。设计了周期长度为8mm．总长度为108mm，中间带有凹槽并可以实现双平面聚焦的Wiggler结构，模拟显示电子注填充因子在75％左右．通过率达到100％。设计了新型的菱形收集极结构，电子轨迹在收集极内发散均匀。[著者文摘]
文章出处:
《强激光与粒子束》-2007年19卷9期 -1517-1520页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1001-4322（2007）09-1517-04
Design of sheet beam klystron electron optics system with Wiggler focusing style
WANG Shu-zhong, WANG Yong, DING Yao-gen, RUAN Cun-jun （Institute of Electronics, Chinese Academy of Sciences, P. 0. Box 2652, Beijing 100080, China）
Abstract:
Planar beams can generate high-power radiation in device like sheet-beam klystrons at high-frequency range. Electron optics system is the key part of the sheet beam klystron. Two-plane Wiggler focusing principle is illustrated in this paper. Elliptical sheet beams with uniform current density are generated by the new- style electron gun geometry which comprises of an elliptically cylindrical cathode and an elliptical focusing electrode. The fill factor of 75 % and the beam transmission of 100% are obtained through the center notched Wiggler focusing system with total length and period length of 108 mm and 8 mm respectively. The trajectories are uniformly distributed in the new diamond-shaped collector.[著者文摘]
Key words:
High power microwave; Sheet beam klystron; Wiggler focusing style; Electron optics system; Electrongun
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