国防科技大学 前沿交叉学科学院，高功率微波技术研究所，长沙 410073
为实现模块化相对论速调管放大器功率、频率和相位的在线测量，对紧凑型高定向性高带宽的定向耦合器进行了仿真和实验研究。利用小孔耦合理论和相位叠加原理进行理论分析，设计了一种双孔紧凑型定向耦合器，在此基础上采用主、副波导正交连接，耦合孔沿轴向和角向二维分布的方法，进一步缩短了耦合器的长度。通过电磁仿真对耦合器各参数进行优化，模拟结果表明：当中心频率为10 GHz时，普通双孔定向耦合器对TM01模式的耦合度为−60.68 dB，在250 MHz的带宽内定向性大于20 dB，此时耦合区长度为3.49 cm。改进型定向耦合器对TM01模式的耦合度为−58.1 dB，在300 MHz的带宽内定向性大于20 dB，此时耦合区长度仅为1.8 cm（约0.6λ）。耦合器的冷腔实验测量结果与仿真结果符合较好。
高功率微波 相对论速调管放大器 定向耦合器 X波段 high power microwave triaxial klystron amplifier directional coupler X-band 强激光与粒子束
2023, 35(5): 053004
强激光与粒子束
2020, 32(10): 103001
强激光与粒子束
2020, 32(10): 103006
Author Affiliations
Abstract
1 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, People's Republic of China
2 State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Changsha 410073, People's Republic of China
This paper provides a review of the compact intense electron-beam accelerators (IEBAs) based on liquid pulse forming lines (PFLs) that have been developed at the National University of Defense Technology (NUDT) in China. The history and roadmap of the compact IEBAs used to drive high-power microwave (HPM) devices at NUDT are reviewed. The properties of both de-ionized water and glycerin as energy storage media are presented. Research into the breakdown properties of liquid dielectrics and the desire to maximize energy storage have resulted in the invention of several coaxial PFLs with different electromagnetic structures, which are detailed in this paper. These high energy density liquid PFLs have been used to increase the performance of IEBA subsystems, based on which the SPARK (Single Pulse Accelerator with spark gaps) and HEART (High Energy-density Accelerator with Repetitive Transformer) series of IEBAs were constructed. This paper also discusses how these compact IEBAs have been used to drive typical HPM devices and concludes by summarizing the associated achievements and the conclusions that can be drawn from the results.
High-power microwave (HPM) Intense electron-beam accelerator (IEBA) Pulsed power technology (PPT) Pulse forming line (PFL) Fluid of high energy density De-ionized water Glycerin Matter and Radiation at Extremes
2018, 3(6): 278
国防科学技术大学 光电科学与工程学院, 长沙 410073
提出了一种多层螺线管线圈电感的精确计算方法，其思想是叠加螺线管单层线圈的自感和不同线圈层之间的互感。建立了用于计算单层线圈自感的显示表达理论模型，给出了两层线圈之间互感的数值计算方法。使用提出的精确算法，计算出一个实验中使用的螺线管线圈的电感为4.30 mH，与实验测量的电感值4.33 mH的偏差小于1%。
三层螺线管 自感 互感 磁场 高功率微波 three-section solenoid self-inductance mutual inductance magnetic field high power microwave 强激光与粒子束
2016, 28(2): 023001
国防科学技术大学 光电科学与工程学院,长沙 410073
提出了一种向内发射磁绝缘振荡器,并给出了微波轴向提取的方法。这种新型结构通过外置阴极、内置阳极,使参与束波作用的轮辐电流通过阳极回流提供了自磁绝缘的角向磁场,有提高器件效率的可能。而外置阴极使阴极的发射面积增大,发射电流密度减小,有利于延长阴极寿命。通过粒子模拟,得到了几何参数与磁绝缘线振荡器输出功率的关系。在电压890 kV,电流56.1 kA下,输出功率为3.6 GW,频率为8.2 GHz。
高功率微波 磁绝缘振荡器 向内发射 粒子模拟 high power microwave magnetically insulated line oscillator inward emitting particle-in-cell simulation
国防科技大学光电科学与工程学院, 长沙 410073
对兰切斯特方程进行推广后，得到了考虑兵力增援和自然损耗、多兵种混合作战、基于系统动力学描述的3个新的兰切斯特方程。在给定实际作战参数的条件下，将基于系统动力学描述的战争模型和其他两个推广兰切斯特方程所得的战争模型相结合，得到了更符合实际战争的模型结果。
兰切斯特方程 战争模型 作战应用 Lanchster Equation warfare modeling combat applications
