Sharma Surender Kumar, Deb P, Sharma Archana, Shukla R, Prabaharan T, Adhikary B, Shyam A
Energetic and Electromagnetic Division, Bhabha Atomic Research Center, Visakhapatnam, India.
Rev Sci Instrum. 2012 Jun;83(6):066103. doi: 10.1063/1.4728206.
The helical pulsed forming line (PFL) can generate longer duration rectangular pulse in a smaller length. A compact PFL using helical water line is designed and experimentally investigated. The impedance of the helical PFL is 22 [ohm sign]. The compactness is achieved in terms of reduction in length of the PFL by a factor of 5.5 using helical water PFL as compared to coaxial water PFL of same length. The helical PFL was pulsed charged to 200 kV using a high voltage pulse transformer in 4.5 μs and discharged into the matched 22 Ω resistive load through a self-breakdown pressurized spark gap switch. The rectangular voltage pulse of 100 kV, 260 ns (FWHM) is measured across the load. The effect of reduction in water temperature on the pulse width is also studied experimentally. The increase in pulse width up to 7% more is observed by reducing the temperature of the deionized water to 5 °C. It will further reduce the length of the PFL and make the system small for compact pulsed power drivers.
螺旋脉冲形成线（PFL）能够在较小的长度内产生持续时间更长的矩形脉冲。设计并对一种采用螺旋水线的紧凑型PFL进行了实验研究。该螺旋PFL的阻抗为22Ω。与相同长度的同轴水PFL相比，采用螺旋水PFL可使PFL的长度缩短5.5倍，从而实现了紧凑性。使用高压脉冲变压器在4.5μs内将螺旋PFL脉冲充电至200 kV，并通过自击穿加压火花隙开关将其放电到匹配的22Ω电阻负载中。在负载两端测得100 kV、260 ns（半高宽）的矩形电压脉冲。还通过实验研究了水温降低对脉冲宽度的影响。将去离子水温度降至5°C时，观察到脉冲宽度增加了7%以上。这将进一步缩短PFL的长度，并使紧凑型脉冲功率驱动器系统体积更小。
