Formation of 1.4 MeV runaway electron flows in air using a solid-state generator with 10 MV/ns voltage rise rate

Mesyats, G.; Pedos, M. S.; Rukin, S. N.; Rostov, V. V.; Romanchenko, I. V.; Sadykova, A. G.; Sharypov, K. A.; Shpak, V. G.; Shunaĭlov, S. A.; Ul’masculov, M. R.; Yalandin, M. I.

doi:10.1063/1.5025751

Cited by 44 publications

(18 citation statements)

References 30 publications

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“…Работы по компрессорам энергии импульсов напряжения активно ведутся коллективом Института электрофизики (ИЭФ) УрО РАН из Екатеринбурга. Первой значимой работой по компрессорам является работа [37], в которой представлен полностью твердотельный генератор импульсов, состоящий из генератора S-500 [38], коммутатора на основе SOS-диода и трехступенчатой системы компрессии на ферритовых линиях. В работе были получены импульсы напряжения амплитудой 860 kV с максимальной скоростью нарастания напряжения 10 МV/ns и фронтом 100 ps.…”

Section: перспективы развития технологии обострения высоковольтных им...unclassified

“…Пиковая мощность генератора составляла 15 GW. Продолжением работы [37] стала работа [39], в которой также представлена полностью твердотельная система с пиковой мощностью 30 GW. Система представляла собой каскад из генератора S-500 и двух линий компрессии с ферритом, в которых изначальный высоковольтный импульс длительностью 7 ns на нагрузке 40 сжимался до 0.65 ns с увеличением напряжения с 500 kV до 1.1 МV, а пиковая мощность импульса увеличивалась с 6 до 30 GW.…”

Section: перспективы развития технологии обострения высоковольтных им...unclassified

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Системы И Технологии На Основе Нелинейных Передающих Линий С Ферритом (Обзор)

Припутнев¹,

Романченко²,

Ростов³

2023

Журнал Технической Физики

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Nonlinear transmission lines with ferrite have been actively developed and studied for about two decades. At the same time, the first works on this topic date back to the middle of the last century. Nonlinear transmission lines with ferrite find their application in various problems of electrophysics, with the greatest application being found in the problems of pulse sharpening, as delay lines and generators of high-power pulses of microwave radiation. The main scientific and technical results of the development of technologies of nonlinear transmission lines with ferrite are presented in chronological order, starting from lines for sharpening the fronts of voltage pulses, ending with multichannel microwave sources based on them.

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Section: перспективы развития технологии обострения высоковольтных им...unclassified

Системы И Технологии На Основе Нелинейных Передающих Линий С Ферритом (Обзор)

Припутнев¹,

Романченко²,

Ростов³

2023

Журнал Технической Физики

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“…In particular, in [78], data are given on the regime of a complete runaway of all free electrons in the gap with a decrease in pressure to ≈300 Torr. For p = 760 Torr, such a regime is also possible, but a rapid increase in the field in the gap to high strengths (≈1 MV/cm) is required [79].…”

Section: Transition From the Eee Emission To The Electron Runaway In ...mentioning

confidence: 99%

Emission Features and Structure of an Electron Beam versus Gas Pressure and Magnetic Field in a Cold-Cathode Coaxial Diode

et al. 2022

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The structure of the emission surface of a cold tubular cathode and electron beam was investigated as a function of the magnetic field in the coaxial diode of the high-current accelerator. The runaway mode of magnetized electrons in atmospheric air enabled registering the instantaneous structure of activated field-emission centers at the cathode edge. The region of air pressure (about 3 Torr) was determined experimentally and via analysis, where the explosive emission mechanism of the appearance of fast electrons with energies above 100 keV is replaced by the runaway electrons in a gas.

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“…To obtain extremely high rates of voltage rise, which is particularly required to generate high-energy runaway electron flows in air [28], a solid-state pulse power system based on a three-stage NLTL was developed [29]. The layout of the system and the pulse transformation sequence are shown in figure 13.…”

Section: Lines For Extremely High Rate Of Voltage Risementioning

confidence: 99%

“…The visual appearance of one of the developed systems is shown in figure 15. And finally, the S-500 generator was used in experiments on formation of high-energy runaway electron flows in air [29]. The generator supplied the three-sectional pulse sharpener based on gyromagnetic NLTLs (figure 13).…”

Section: Jinst 13 P08001mentioning

confidence: 99%

Solid-state repetitive generators of short GW-range pulses: a review

Rukin¹

2018

J. Inst.

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The paper presents a brief review of solid-state repetitive generators of nano- and subnanosecond pulses with GW-range of peak power developed by Institute of Electrophysics. The base of the described approach for obtaining such pulses consists in using solid-state generators with its output unit containing intermediate inductive storage and semiconductor opening switch (SOS). The most powerful SOS generator of S-500 type is described. The generator provides a peak power of up to 6 GW, an output voltage of 500–900 kV, a voltage rise time of 2–3 ns, a pulse length (full width at half maximum, FWHM) of 5–7 ns across external loads of 40–100 Ω, and a pulse repetition frequency up to 1 kHz in the burst mode of operation. To reduce the voltage rise time of S-500 generator semiconductor sharpeners are used. The sharpeners are made as stacks of series-connected dynistor structures built into an oil-filled coaxial line at the place of an inner conductor. An input voltage pulse has the amplitude of 540 kV with the rise time of ∼1.2 ns and voltage rise rate of ∼0.3 MV/ns. After pulse propagation through the sharpening sections, its rise time is reduced down to 360 ps, and the voltage rise rate is increased up to ∼0.95 MV/ns. Peak power of the sharpened pulse is within the range of 4.5–5.5 GW. It is shown, that gyromagnetic nonlinear transmission line (NLTL) can operate as a magnetic pulse compressor. At such an operating regime, the duration of the input pulse is close to the period of generated oscillations, and the main part of the input pulse energy is transmitted only to the first peak of the oscillations. In energy compression experiments, the input pulse with amplitude of 500 kV and FWHM of 7 ns is applied to the NLTL. At the output of the NLTL in 40 Ω coaxial transmission line, the pulse amplitude is increased to 740 kV and the pulse duration is reduced to ∼2 ns, which correspond to power amplification of the input pulse from ∼6 to ∼13 GW. In pulse sharpening experiments, a three-stage NLTL is used. The system provides a peak power of 15 GW in 44-Ω line, FWHM of 120 ps, and a record high level of the voltage rise rate of 10 MV/ns. Applications of the developed generators are given.

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Formation of 1.4 MeV runaway electron flows in air using a solid-state generator with 10 MV/ns voltage rise rate

Cited by 44 publications

References 30 publications

Системы И Технологии На Основе Нелинейных Передающих Линий С Ферритом (Обзор)

Системы И Технологии На Основе Нелинейных Передающих Линий С Ферритом (Обзор)

Emission Features and Structure of an Electron Beam versus Gas Pressure and Magnetic Field in a Cold-Cathode Coaxial Diode

Solid-state repetitive generators of short GW-range pulses: a review

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