Li Song, Gao Jing-Ming, Yang Han-Wu, Qian Bao-Liang, Li Ze-Xin
College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, People's Republic of China.
Rev Sci Instrum. 2015 Aug;86(8):084705. doi: 10.1063/1.4929516.
In this paper, a gigawatt level repetitive rate adjustable magnetic pulse compressor is investigated both numerically and experimentally. The device has advantages of high power level, high repetitive rate achievability, and long lifetime reliability. Importantly, dominate parameters including the saturation time, the peak voltage, and even the compression ratio can be potentially adjusted continuously and reliably, which significantly expands the applicable area of the device and generators based on it. Specifically, a two-stage adjustable magnetic pulse compressor, utilized for charging the pulse forming network of a high power pulse generator, is designed with different compression ratios of 25 and 18 through an optimized design process. Equivalent circuit analysis shows that the modification of compression ratio can be achieved by just changing the turn number of the winding. At the same time, increasing inductance of the grounded inductor will decrease the peak voltage and delay the charging process. Based on these analyses, an adjustable compressor was built and studied experimentally in both the single shot mode and repetitive rate mode. Pulses with peak voltage of 60 kV and energy per pulse of 360 J were obtained in the experiment. The rise times of the pulses were compressed from 25 μs to 1 μs and from 18 μs to 1 μs, respectively, at repetitive rate of 20 Hz with good repeatability. Experimental results show reasonable agreement with analyses.
本文对千兆瓦级重复频率可调磁脉冲压缩器进行了数值和实验研究。该装置具有高功率水平、高重复频率可达性和长寿命可靠性等优点。重要的是，包括饱和时间、峰值电压甚至压缩比在内的主要参数都可以潜在地连续可靠地调节，这显著扩大了该装置以及基于它的发生器的适用范围。具体而言，通过优化设计过程，设计了一种用于为高功率脉冲发生器的脉冲形成网络充电的两级可调磁脉冲压缩器，其压缩比分别为25和18。等效电路分析表明，仅通过改变绕组匝数就可以实现压缩比的改变。同时，增加接地电感的电感值会降低峰值电压并延迟充电过程。基于这些分析，构建了一个可调压缩器，并在单次模式和重复频率模式下进行了实验研究。实验中获得了峰值电压为60 kV、单脉冲能量为360 J的脉冲。在20 Hz的重复频率下，脉冲的上升时间分别从25 μs压缩到1 μs以及从18 μs压缩到1 μs，且具有良好的重复性。实验结果与分析结果合理吻合。
