强激光与粒子束, 2011, 23 (2): 563, 网络出版: 2011-03-02   

3 MV感应电压叠加器的磁感应腔研制

Design of inductive cavity for 3 MV induction voltage adder
作者单位
西北核技术研究所, 西安 710024
摘要
根据脉冲驱动源和负载参数, 提出了3 MV感应电压叠加器磁感应腔的设计指标为1.2 MV/70 ns。由感应腔的电流传输效率和真空同轴线绝缘要求, 确定了磁芯的几何尺寸; 研制了矩形比为0.5的预退火非晶磁环, 明确磁环数量不少于6只; 在30 T/s时, 实验测量的最大脉冲相对磁导率与饱和波模型计算结果相当; 估算磁感应腔的等效激磁电感约为7.3 μH, 涡流损耗电阻约为139 Ω。根据临界击穿场强的经验公式, 采用电场数值分析方法, 确定了磁感应腔的电气结构; 实验验证了磁感应腔设计有效性; 建立了基于磁感应腔的3 MV感应电压叠加器全电路模型, 阳极杆箍缩二极管电压、电流计算波形, 与实验结果基本相符。
Abstract
According to pulse driver and its load parameters, the designed specifications of 1.2 MV/70 ns are calculated for induction cell of inductive voltage adder(IVA). Considering the current efficiency and vacuum line insulation, the mechanical dimensions of cores are chosen. The pre-annealed amorphous cores with remanence ratio of 0.5 measured by experiments is produced, and the number of magnetic toroids is determined as no less than 6. The measured peak permeability of cores with flux density changing rate up to 30 T/μs is consistent with that derived by saturation wave model. The equivalent magnetization inductance and eddy loss resistance are respectively estimated as 7.3 μH and 139 Ω. By the empirical formula of critical breakdown field and the numerical analysis of electric field, the designing of electrical structure of IVA cell is completed, whose effectiveness is experimentally validated. A whole circuit model with parameters of designed induction cell is established for 3 MV IVA driver, by which the calculation waveforms of rod pin diode roughly accord with the experimental results.
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丛培天, 张国伟, 吴撼宇, 孙剑锋, 李静雅, 苏兆峰, 杨海亮, 孙凤举, 邱爱慈. 3 MV感应电压叠加器的磁感应腔研制[J]. 强激光与粒子束, 2011, 23(2): 563. Cong Peitian, Zhang Guowei, Wu Hanyu, Sun Jianfeng, Li Jingya, Su Zhaofeng, Yang Hailiang, Sun Fengju, Qiu Aici. Design of inductive cavity for 3 MV induction voltage adder[J]. High Power Laser and Particle Beams, 2011, 23(2): 563.

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