Gusev A I, Pedos M S, Rukin S N, Timoshenkov S P
Institute of Electrophysics, UB, RAS, Yekaterinburg 620016, Russia.
Rev Sci Instrum. 2017 Jul;88(7):074703. doi: 10.1063/1.4993732.
In this work, experiments were made in which gyromagnetic nonlinear transmission line (NLTL) operates as a peak power amplifier of the input pulse. At such an operating regime, the duration of the input pulse is close to the period of generated oscillations, and the main part of the input pulse energy is transmitted only to the first peak of the oscillations. Power amplification is achieved due to the voltage amplitude of the first peak across the NLTL output exceeding the voltage amplitude of the input pulse. In the experiments, the input pulse with an amplitude of 500 kV and a half-height pulse duration of 7 ns is applied to the NLTL with a natural oscillation frequency of ∼300 MHz. At the output of the NLTL in 40 Ω coaxial transmission line, the pulse amplitude is increased to 740 kV and the pulse duration is reduced to ∼2 ns, which correspond to power amplification of the input pulse from ∼6 to ∼13 GW. As a source of input pulses, a solid-state semiconductor opening switch generator was used, which allowed carrying out experiments at pulse repetition frequency up to 1 kHz in the burst mode of operation.
在这项工作中，进行了相关实验，其中回旋磁非线性传输线（NLTL）用作输入脉冲的峰值功率放大器。在这种工作模式下，输入脉冲的持续时间接近产生振荡的周期，并且输入脉冲能量的主要部分仅传输到振荡的第一个峰值。功率放大是由于NLTL输出端第一个峰值的电压幅度超过了输入脉冲的电压幅度。在实验中，将幅度为500 kV、半高脉冲持续时间为7 ns的输入脉冲施加到自然振荡频率约为300 MHz的NLTL上。在40 Ω同轴传输线中的NLTL输出端，脉冲幅度增加到740 kV，脉冲持续时间缩短到约2 ns，这对应于输入脉冲的功率从约6 GW放大到约13 GW。作为输入脉冲源，使用了固态半导体断路开关发生器，这使得能够在高达1 kHz的脉冲重复频率下以猝发模式进行实验。
