High-power ultrawideband radiation source

Andreev, Yu. A.; Gubanov, V. P.; Efremov, A. M.; Koshelev, V. I.; Korovin, S. D.; Kovalchuk, B. M.; Kremnev, V. V.; Plisko, V. V.; Степченко, А. С.; Sukhushin, K. N.

doi:10.1017/s0263034603212088

Cited by 44 publications

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“…The general principle to sharp a leading edge of a highvoltage pulse is understandable [1]- [4]. The conditions of breakdown in the sharpening gap have to be chosen in such a manner that the operating pressure and the electric field reduced to the pressure be as high as possible.…”

Section: Introductionmentioning

confidence: 99%

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High-Voltage Spark Gap in a Regime of Subnanosecond Switching

Korolev

Bykov

2012

IEEE Trans. Plasma Sci.

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This paper describes an investigation of a highvoltage spark gap in the conditions of subnanosecond switching. The high-voltage pulsed generator "Sinus" is used to charge a coaxial line loaded to a high-pressure spark gap. Typical charging time for the coaxial line is in a range from 1 to 2 ns, maximum charging voltage is up to 250 kV, and a range of pressures for the gap is from 2 to 9 MPa. The theoretical models of the switching process on subnanosecond time scale are examined. A general equation for temporal behavior of the gap voltage, which is applicable for the avalanche model and the Rompe-Weitzel model has been obtained. It is revealed that the approach based on the avalanche model offers a possibility to describe the switching process only at extremely high overvoltages. The Rompe-Weitzel model demonstrates a good agreement with the experimental data both for the conditions of static breakdown and for the regime of a high overvolted gap. Comparison of experimental and calculated voltage waveforms has made it possible to estimate an empirical constant in the Rompe-Weitzel model (the price of ionization). This constant is varied from 420 to 920 eV, depending on the initial electric field in the gap.Index Terms-High-pressure spark discharge, subnanosecond discharge, subnanosecond high-voltage generators.

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Section: Introductionmentioning

confidence: 99%

“…Earlier, the models had been successfully used for the nanosecond time range [9], [12]. However, only a limited number of the works are available where the similar approaches are developed for the subnanosecond scale [1], [4], [13].…”

Section: Introductionmentioning

confidence: 99%

High-Voltage Spark Gap in a Regime of Subnanosecond Switching

Korolev

Bykov

2012

IEEE Trans. Plasma Sci.

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“…Combined antennas comprising electric and magnetic radiators and TEM-horns [6] were used as transmitting antennas. The TEM-antenna [2] comprising a ground plate 120 × 50 cm, an electrode 90 cm long, and an aperture height of 8 cm was used as an etalon for measuring ultra-wideband pulse waveforms. According to [7], the effective length of the TEM-antenna is taken to be half the aperture height: l TEM = 4 cm.…”

Section: Results Of Experimental Investigationsmentioning

confidence: 99%

“…At present TEM-antennas [2] are widely used for reception of ultra-wideband pulses with small distortions; however, their sizes exceed the spatial length of the registered electromagnetic pulse. This limits the use of the TEMantennas in arrays and makes their use for elements of vector receiving antennas impossible.…”

Section: Introductionmentioning

confidence: 99%

An active antenna for measuring pulsed electric fields

2007

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“…Ultrafast switch~Frost et al, 1993! is a key component for constructing an ultra-wideband source~Agee et al, 1998;Prather et al, 2000;Andreev et al, 2003! that is of interest for a variety of potential applications ranging from transient radar system to underground objects detection.…”

Section: Introductionmentioning

confidence: 99%

Gas discharge in a gas peaking switch

Wang

Song

2005

Laser Part. Beams

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The gas discharge in a gas peaking switch was experimentally studied and numerically simulated. For simulation, the discharge was divided into two phases, gas breakdown and voltage collapse. The criterion for an electron avalanche to transit to streamer was considered as the criterion of gas breakdown. The spark channel theory developed by Rompe-Weizel was used to calculate the spark resistance. It was found that the prepulse considerably lowers the voltage pulse applied to the gap. Even for a given input pulse, the voltage pulse applied to a peaking gap is different for different gap distance due to existence of a different prepulse. In this case, the breakdown voltage of a gas peaking gap depends on gas pressure and gap distance, individually. For nitrogen pressure varying from 3 MPa to 10 MPa and gap distance from 0.6 mm to 1.2 mm, the peak electric field higher than 2 MV0cm was achieved when breakdown. The output 10% to 90% rise time, t r , varies from 145 ps to 192 ps. As gas pressure increases, t r decreases, which can be explained by the fact that the breakdown field increases with the increase of gas pressure. It was found in experiment that the jitter in t r could be attributed to the jitter in breakdown field. Instead of getting longer, the averaged experimental t r gets shorter as gap distance increases from 0.6 mm to 1.2 mm, which differs from the results of calculation and indicates there may exist something, other than electric field, that is also related to t r . The reason for this difference may lies in the inverse coefficient of spark resistance varying with gap distance. On the whole, the results from the calculations agree with the experimental ones.

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High-power ultrawideband radiation source

Cited by 44 publications

References 0 publications

High-Voltage Spark Gap in a Regime of Subnanosecond Switching

High-Voltage Spark Gap in a Regime of Subnanosecond Switching

An active antenna for measuring pulsed electric fields

Gas discharge in a gas peaking switch

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