Methods for recording the time profile of single ultrashort pulses of electron beams and discharge currents in real‐time mode

Тарасенко, В. Ф.; Рыбка, Д. В.

doi:10.1049/hve.2016.0007

Cited by 23 publications

(11 citation statements)

References 27 publications

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“…The effect of gas pressure on the amplitude and duration of the SAEB is shown. Synchronisation method of SAEB current pulses with voltage and discharge current pulses is described in [55]. Fig.…”

Section: Spatial Forms Of Rep Dd In Different Gasesmentioning

confidence: 99%

Runaway electrons during subnanosecond breakdowns in high‐pressure gases

et al. 2016

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The parameters of runaway electrons produced in nanosecond high-voltage discharges in different gases (air, nitrogen, sulphur hexafluoride, krypton, argon, methane, neon, hydrogen, helium) at atmospheric and higher pressure were studied. An optical analysis was also performed to investigate the ionisation dynamics in diffuse discharges in nitrogen and nitrogen-containing mixtures. At breakdown of a point-to-plane gap by nanosecond (≃2 ns) high-voltage (≃200 kV) pulses of negative voltage polarity and gas pressure above 0.1 MPa, a supershort avalanche electron beam (SAEB) was detected by a collector behind the flat anode. For pressure >0.1 MPa of nitrogen and other gases it is shown that the maximum pressure for SAEB registration decreases with increasing the voltage pulse rise time. Therefore, to detect a SAEB at atmospheric and higher gas pressure, one should use voltage pulses with an amplitude of hundred kilovolts and rise time of ∼1 ns and shorter. The experimental research in the dynamics of optical radiation from the discharge plasma shows that the breakdown in which runaway electrons are produced develops as an ionisation wave. High Voltage

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Section: Spatial Forms Of Rep Dd In Different Gasesmentioning

confidence: 99%

Runaway electrons during subnanosecond breakdowns in high‐pressure gases

et al. 2016

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“…This was combined with a transmission line (wave impedance Z is 75 Ω) equipped with a capacitive voltage divider (CVD). A detailed description and study of the capabilities of the measuring sensors (CVDs, current shunts, collectors) used in the setup are described in [19,20].…”

Section: Experimental Setup and Methodsmentioning

confidence: 99%

High-Voltage Nanosecond Discharge as a Means of Fast Energy Switching

2021

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The formation of a nanosecond discharge with the use of a Hamamatsu streak-camera and with simultaneously wideband (10 GHz) measurement of voltage and displacement current caused by a streamer in one pulse has been studied. Nanosecond voltage pulses of various amplitudes (16, 20, and 27 kV) were applied across a point-to-plane gap (8.5 mm) filled with air at various pressures (13, 25, 50, 100, and 200 kPa). It was found that the voltage across the gap drops as soon as a streamer appears in the vicinity of the pointed electrode. At the same time, a pre-breakdown current begins to flow. The magnitude of the pre-breakdown current, as well as the voltage drop, is determined by the rate of formation of dense plasma and, accordingly, by the rate of redistribution of the electric field in the gap. The streamer velocity determines the rise time and amplitude of the current. The higher the streamer velocity, the shorter the rise time and the higher the amplitude of the pre-breakdown current. The propagation of a backward and third ionization waves was observed both with the streak camera and by measuring the displacement current. As they propagate, the discharge current increases to its amplitude value.

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“…1 and 3, the diameters of the collector's receiving parts were 20 and 13 mm, respectively. Temporal resolutions of ones were 80 and 50 ps, respectively, [38]. The signals from these sensors were transmitted to a DSO‐X6004A digital real‐time oscilloscope (6 GHz, 20 GS/s) (Keysight Technologies, USA) via RG58‐A/U high‐frequency cables (Antenna Network Lab Inc., USA) having a length of 1.5 m with N‐type connectors Suhner 11 N‐50‐3‐28/133 NE (HUBER + SUHNER, Switzerland) and SMA connectors Radiall R125.075.000 (Radiall, France).…”

Section: Methodsmentioning

confidence: 99%

“…2, the collector's receiving part was 30 mm in diameter. Its temporal resolution was 150 ps [38]. The signals from the detectors were transmitted via RF cables with length of 4 m to a LeCroy WaveMaster 808Zi‐A digital real‐time oscilloscope (8 GHz, 40 GS/s), having a temporal resolution better than 80 ps.…”

Section: Methodsmentioning

confidence: 99%

Influence of electrode spacing and gas pressure on parameters of a runaway electron beam generating during the nanosecond breakdown in SF ₆ and nitrogen

et al. 2017

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This study deals with experimental and theoretical simulation data showing the influence of electrode spacing and gas pressure on parameters of a supershort avalanche electron beam (SAEB) formed in SF 6 and nitrogen at different rise times and amplitudes of a voltage pulse. Using GIN-55-01, VPG-30-200, and SLEP-150M pulsers, tubular cathodes with a diameter of 6 mm, as well as gaps of 3, 5, and 8 mm, it was shown that the SAEB current amplitude can both increase and decrease depending on an electrode spacing, a waveform and a rise time of the voltage pulse, as well as the pressure of SF 6 and nitrogen. It was established as a result of simulation that maximal voltage across the gap during the process of generation of runaway electrons and the thickness of an anode foil have a major effect on the SAEB current pulse amplitude.

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Methods for recording the time profile of single ultrashort pulses of electron beams and discharge currents in real‐time mode

Cited by 23 publications

References 27 publications

Runaway electrons during subnanosecond breakdowns in high‐pressure gases

Runaway electrons during subnanosecond breakdowns in high‐pressure gases

High-Voltage Nanosecond Discharge as a Means of Fast Energy Switching

Influence of electrode spacing and gas pressure on parameters of a runaway electron beam generating during the nanosecond breakdown in SF ₆ and nitrogen

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Methods for recording the time profile of single ultrashort pulses of electron beams and discharge currents in real‐time mode

Cited by 23 publications

References 27 publications

Runaway electrons during subnanosecond breakdowns in high‐pressure gases

Runaway electrons during subnanosecond breakdowns in high‐pressure gases

High-Voltage Nanosecond Discharge as a Means of Fast Energy Switching

Influence of electrode spacing and gas pressure on parameters of a runaway electron beam generating during the nanosecond breakdown in SF 6 and nitrogen

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Influence of electrode spacing and gas pressure on parameters of a runaway electron beam generating during the nanosecond breakdown in SF ₆ and nitrogen