复合磁场引导的小型化二极管初步设计

李春霞; 王淦平; 金晓

doi:10.11884/HPLPB201830.180143

复合磁场引导的小型化二极管初步设计

doi: 10.11884/HPLPB201830.180143

中国工程物理研究院应用电子学研究所, 高功率微波技术重点实验室, 四川绵阳 621900

基金项目:

国家自然科学基金项目 11475158

详细信息

作者简介:
李春霞(1983—)，女，助理研究员，从事脉冲功率技术研究; lichunxia@caep.cn

中图分类号: O562.5
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- 被引次数: 0
出版历程
- 收稿日期: 2018-05-15
- 修回日期: 2018-07-05
- 刊出日期: 2018-10-15

Preliminary design of axial foilless diode guided by composite magnetic field system

Science and Technology on High Power Microwave Laboratory, Institute of Applied Electronics, CAEP, Mianyang 621900, China

摘要

摘要: 设计了一种非浸没式小型化轴向无箔二极管，其阴极发射区位于螺线管中心孔以外，采用螺线管、永磁体和软磁体构成的复合引导磁场系统。采用CST优化设计二极管结构，使其满足800 kV电压下绝缘要求; 优化设计磁场系统结构及物理参数，使其满足引导强流相对论电子束高效率传输的要求。采用粒子模拟(PIC)软件仿真电子束产生及传输过程，验证其高传输效率。设计的阳极筒直径比原结构缩小约40%，在产生同样均匀区轴向磁场强度情况下，引导磁场重量和功耗比原结构降低约40%，仿真结果显示主引导磁场0.85 T下，8 kA电流能够实现100%传输效率。
- 无箔二极管 /
- 小型化 /
- 非浸没式 /
- 复合引导磁场 /
- 传输特性
Abstract: A composite guide magnetic field system for axial foilless diode was designed, which included a solenoid, a permanent magnet and a soft magnet. The cathode emission region was put outside the solenoid magnet, to get smaller inner radius of solenoid and lower electric field on cathode rod surface. The permanent magnet and the soft magnet compensate magnetic density of the cathode emission region, to meet the requirement for stable transmission. Weight and power of the guide magnetic field system were both reduced more than 40% as compared with the system using a classical solenoid magnet. PIC simulation on transmission characteristic of electron beams in the composite guide magnetic field system was studied, which proved that axial electron beams could be stably transmitted in the system.
- foilless diode /
- miniturization /
- non-immersion /
- composite guide magnetic field /
- transmission characteristic

HTML全文

图 1 复合磁场引导的小型化无箔二极管结构示意图

Figure 1. Configuration of compact foilless diode guided by composite magnet

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图 2 二极管区域的电场强度矢量图

Figure 2. Electric vector of diode region

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图 3 二极管区域的磁感应强度矢量图

Figure 3. Magnetic vectors of diode region

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图 4 两种磁场沿电子束传输路径的B_z值

Figure 4. B_z along transmission route of solenoid and composite magnet

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图 5 PIC软件模拟电子束轨迹

Figure 5. PIC simulation result of electrons trace

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图 6 发射端与接收端电流波形

Figure 6. Waveforms of emitted current and received current

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表 1 螺线管磁场和复合引导磁场参数对比

Table 1. Comparison between solenoid and composite magnet

magnet type	inner radius/mm	outer radius/mm	length/mm	volume/L	power/kW	weight/kg
solenoid	151	351	600	70	30	420
composite magnet	95	337	400	36	16	238

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