High-voltage, high rep-rate, low jitter, UWB source with ferroelectric trigger

Bowen, Leland H.; Farr, Everett G.; Elizondo, J.M.; Lehr, J.M.

doi:10.1109/ppc.1999.823722

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…High pressure gas switches, with N 2 or H 2 , for example, have been shown to produce risetimes on the order of 50 to 200 ps [1,2,3], and their principle of operation is described in terms of standard gas breakdown, i.e. the Townsend and streamer mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…A crucial element is the application of a high voltage pulse to a test gap, with the goal to minimize risetime limitations due to capacitance and changes in geometry. Some attempts have been made to design and investigate fast switching devices using transmission lines and special matching techniques for coaxial line to gap, such as the use of biconical transmission line sections and lenses to minimize pulse distortion [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Subnanosecond Breakdown of Insulating Media

Krompholz¹,

Hatfield²

2006

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Subnanosecond Breakdown of Insulating Media

Krompholz¹,

Hatfield²

2006

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“…As discussed in [1], ferratrons are a class of high-voltage repetitive gas switch with a ferroelectric (FE) trigger. In this work, we develop a new test chamber for the ferratron [2], and we build and test a novel hybrid trigatron/ferratron switch in the new chamber design.…”

Section: Introductionmentioning

confidence: 99%

“…In [1], we demonstrated shot-to-shot jitter values of 63 ps in a train of consecutive pulses at 1 Hz repetition rate, at a few kilovolts, with a ferroelectric triggered gas switch operating at high pressure. This was accomplished using a simple ferroelectric ceramic as the trigger element.…”

Section: Introductionmentioning

confidence: 99%

<title>Recent progress in ferratron measurements</title>

Farr

Elizondo²,

Lehr

et al. 2001

SPIE Proceedings

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We provide here an update on the status of ferratron development. The ferratron is a highvoltage, fast risetime, gas switch with low-jitter and high repetition rate. It is triggered by the emission of electrons from a ferroelectric device. It may be suitable for phased arrays due to it's low jitter. We have designed and built a test chamber for measuring the output of the ferratron. The test chamber is designed to launch a fast-risetime wave into an electrically large coaxial structure. The transition from gas to oil is accomplished with a polyethylene lens with one surface being a hyperbola of revolution. The goal of the transition is to preserve the risetime of the wave as it transitions from gas to oil coax. Since the output coax is electrically large, optical methods are required to maintain a planar phase front in the coaxial output. We provide here preliminary data on the test chamber characteristics, in terms of both TDR (time domain reflectometry) and TDT (time domain transmission). We have included in our test chamber a method of connecting the gap to a feed cable, in order to drive the gap with a known source for calibration. We demonstrate that the risetime of the test chamber in time domain transmission (TDT) mode is around 50 ps, which is sufficiently fast to measure the anticipated 100 ps risetime of the pulses to be generated by the ferratron. In addition, we have taken a TDR of the test chamber, showing that the impedance varies from around 35 ohms to 60 ohms. However, the deviations from 50 ohms have a very short duration, and will likely not be apparent in data with 100 ps risetime. We also provide measurements of the switch in a hybrid trigatron/ferratron mode.

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