Pulsed power switch modeling for broad operation

Glover, Steven F.; Foster, Peter; McDaniel, D. H.; White, F.E.; Pena, Gary; Zutavern, F.J.

doi:10.1109/ipmhvc.2012.6518861

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…In previous papers, data from this circuit was fit using the Braginskii [10] -Martin [11] model with (1) genetic optimization [12], and (2) piecewise constant resistance least squares fits (LSFs) to a damped harmonic oscillator solution [13]. The genetic optimization gave reasonable fits, but was time intensive (hours on one PC).…”

Section: Loadmentioning

confidence: 99%

Extracting dynamic resistance from a pulsed power switch with a least squares approach

Zutavern

Glover

Mancuso

et al. 2013

2013 19th IEEE Pulsed Power Conference (PPC)

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Pulsed power gas switches operate under extreme conditions holding off voltages at millions of volts and greater, conducting currents at 100's of kiloamps, and can reliably trigger with less than 10ns of jitter at optimal operating conditions. However as Martin and Braginskii had noted the impedance of these switches is dynamic and a function of many parameters such as gas pressure, current, and the number of channels. In systems such as Protogen or Ursa Minor many gas switches are utilized to enable optimal performance and pulse shaping. A challenge with either system is that, if the switches are tightly coupled and one switch triggers early, then the fields on the second switch change dramatically and can move the second switch into a new operating regime that will result in a different dynamic resistance. This paper presents a least squares approach to extracting the Martin and Braginskii switch resistance with field dependent carrier recombination from measured data. Figure 9. Total switch resistance versus charge voltage.

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Section: Loadmentioning

confidence: 99%

Extracting dynamic resistance from a pulsed power switch with a least squares approach

Zutavern

Glover

Mancuso

et al. 2013

2013 19th IEEE Pulsed Power Conference (PPC)

Self Cite

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A calculation model for breakdown time delay and jitter of gas switches under hundred-nanosecond pulses and its application in a self-triggered pre-ionized switch

Wang¹,

Wang²,

Chen³

2021

Plasma Sci. Technol.

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In this paper, a calculation model for the breakdown time delay and jitter of gas switches under hundred-nanosecond pulses is proposed and applied in a self-triggered pre-ionized switch. The effects of injection time of pre-ionization, pulse rise time, and the pre-ionization jitter are discussed and verified through experiments. It indicates that the pre-ionization should be injected when the electric field is high enough in the gap, injection after 80% peak-time can ensure its effectiveness. Then the statistical time delay jitter will be determined by the pre-ionization jitter, which is an intrinsic restriction of the self-triggered switch. However, when the changing rate of the pulsed electric field exceeds a certain value, the breakdown time delay jitter can be partly offset in the formative stage because the formative time delay has an exponential relationship with the electric field. Therefore, lower time jitter can be obtained under pulses with a shorter pulse rise time. In general, the results of the calculation model agree with the experimental results, and the experimental parameters which lead to a low jitter can also be used as a reference.

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