Subnanosecond Breakdown in Argon at High Overvoltages

Krompholz, H.; Hatfield, L.L.; Neuber, A.; Hemmert, D.; Kohl, K.; Chaparro, J.

doi:10.1109/ppc.2005.300679

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…Early physical models, based on streamer development for electron runaway conditions have been introduced by [4][5][6][7], and more recent and comprehensive discussions can be found in [8,9]. Previous experimental results from work done at TTU, with voltage risetimes at the gap of about 300 ps, are described in [10,11].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast gas breakdown at pressures below one atmosphere

Krompholz

Hatfield

Neuber

et al. 2006

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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Gas breakdown in quasi homogeneous electric fields with amplitudes of up to 3 MV/cm is investigated. The setup consists of a RADAN 303 A pulser and pulse slicer SN 4, an impedance-matched oil-filled coaxial line with a lens-transition to a biconical line in vacuum or gas, and an axial or radial gap with a width on the order of mm, with a symmetrical arrangement on the other side of the gap. Capacitive voltage dividers allow to determine voltage across as well as conduction current through the gap, with a temporal resolution determined by the oscilloscope sampling rate of 20 GS/s and an analog bandwidth of 6 GHz. The gap capacitance charging time and voltage risetime across the gap is less than 250 ps. Previous experiments at TTU with a slightly larger risetime have shown that breakdown is governed by runaway electrons, with multi-channel formation and high ionization and light emission in a thin cathode layer only. In argon and air, time constants for the discharge development have been observed to have a minimum of around 100 ps at several 10 torr. A qualitative understanding of the observed phenomena and their dependence on gas pressure is based on explosive field emission and gaseous ionization for electron runaway conditions.

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Section: Introductionmentioning

confidence: 99%

Ultrafast gas breakdown at pressures below one atmosphere

Krompholz

Hatfield

Neuber

et al. 2006

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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“…The availability of a RADAN 303 A pulser with pulse slicer SN 4 enabled the investigation of breakdown for quasi-homogeneous fields for both volume and surface breakdown with pulser voltages up to 150 kV. [22,23].…”

Section: Introductionmentioning

confidence: 99%

Subnanosecond Breakdown of Insulating Media

Krompholz¹,

Hatfield²

2006

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