Square pulse linear transformer driver

Abstract

The linear transformer driver (LTD) technological approach can result in relatively compact devices that can deliver fast, high current, and high-voltage pulses straight out of the LTD cavity without any complicated pulse forming and pulse compression network. Through multistage inductively insulated voltage adders, the output pulse, increased in voltage amplitude, can be applied directly to the load. In this paper, we present the design and first test results of an LTD cavity that generates such a type of output pulse by including within its circular array a number of third harmonic bricks in addition to the main bricks. A voltage adder made out of a square pulse cavity linear array will produce the same shape output pulses provided that the timing of each cavity is synchronized with the propagation of the electromagnetic pulse.

High-voltage pulse waveform modulator based on solid-state Marx generator

“…Comparing with the parameters of the Marx generator in Table 1, the triangular pulse has lower rising edge and falling edge which were set specially. The pulse length also meets the expectation (4)(5). It can stably generate this pulse of ~120 kV in 0.1 Hz.…”

“…Owing to magnet cores, LTD generators have low efficiency and big sizes. It is more complex to generate square pulses [4] than Marx generators. Compared with these generators, Marx generators are good choice to generate standard rectangular pulses in high efficiency.…”

A Primer on Pulsed Power and Linear Transformer Drivers for High Energy Density Physics Applications

“…24 and Refs. [30], [35], where Ref. [35] in particular discusses how to generate "flat-topped" squarewave-like voltage and current pulses from an LTD).…”

“…pulses can be generated from a single LTD cavity, as shown in Fig. 24(c,d) [35]. The flat-topped pulses are obtained by setting τ brick = 3 · τ brick = (3π/2) L brick C brick , where τ brick is the rise time of the main bricks, and τ brick , L brick , and C brick are the rise time, inductance, and capacitance of the faster bricks.…”

“…Note that the pulse-shaping techniques described in Refs. [30], [35] are in addition to the pulse-shaping technique mentioned previously and described in Ref. [105], where bricks are used directly to drive long, transit-time isolated coaxial cables.…”