Enhancement of emission currents in plasma electron sources based on a low-pressure arc discharge

Koval, N. N.; Devyatkov, V. N.; Hung, Nguyen Bao

doi:10.1088/1742-6596/652/1/012061

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…The baffles are intended to screen the electrode system of the trigger unit from the main gap and to prevent the switch from the occasional breakdowns. However, when the trigger discharge arises, the discharge plasma is generated in all space of the hollow cathode C including the narrow slit between the upper baffle and the flat part of the electrode C. The electrons from this plasma are extracted to the main gap, [17][18][19][20] and the main discharge is initiated under the action of electron beam in accordance with the mechanism described in Refs. 4,17. At the first stage of the discharge development, the gas discharge plasma appears between the electrodes G and C. The energy for plasma generation is delivered from the intrinsic capacitance of the lower section of the device.…”

Section: Principle Of Thyratron Operation As Applied To the Propomentioning

confidence: 88%

“…The discharge is sustained between the ring anode A 1 and the cathode C 1 due to the power supply V 1 . Typically, this is a steady state hollow-cathode glow discharge with a current of (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) the current flows to the electrode C 1 . This current will be denoted as i 1 .…”

Section: Principle Of Thyratron Operation As Applied To the Propomentioning

confidence: 99%

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Triggering of cold-cathode thyratron in electric circuit with grounded grid

et al. 2017

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Dependence of pre-breakdown time on ionization processes in a pseudospark discharge AIP Advances 7, 115005 (2017); https://doi.org/10.1063/1.5003242Development of high-power gas discharge and electronic vacuum devices for pulsed electrophysic. This paper deals with the investigations of the sealed-off hold-cathode thyratron (pseudospark switch) TPI1-10k/50, which is commercially produced by the Pulsed Technology Ltd., Ryazan, Russia. The trigger unit of the switch is based on a low-current auxiliary glow discharge. The new method for the switch triggering is proposed. The essence of the method is that the thyratron grid and the hollow cathode of the auxiliary discharge has to be grounded and the trigger pulse is applied to the ring anode of the trigger unit. In the proposed method, an undesirable high-voltage spike at the thyratron grid, which can appear with a usage of the other methods of triggering, is absent. It is shown that to trigger the thyratron a critical pulsed current to the main cathode cavity at a level of 0.8 A and higher should be provided. When the current exceeds the critical value, the jitter in the delay time to triggering falls in a range of 10 ns. This means that the method of triggering can be used in a variety of applications that require a low jitter in the delay time. © 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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Section: Principle Of Thyratron Operation As Applied To the Propomentioning

confidence: 88%

Section: Principle Of Thyratron Operation As Applied To the Propomentioning

confidence: 99%

Triggering of cold-cathode thyratron in electric circuit with grounded grid

et al. 2017

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“…Тогда электронный поток из этой плазмы через отверстия в верхней плоскости электрода C будет извлекаться в основной промежуток. По сути, данная система представляет собой электронную пушку с плазменным катодом [4,5,22,27]. Благодаря потоку электронов в основной промежуток происходит формирование плазмы в электродной системе AC по механизму, описанному в [4,5,10,25], и инициирование сильноточного разряда.…”

Section: экспериментальная установка и методика измеренийunclassified

Особенности Работы Тиратрона С Холодным Катодом При Наличии Обратной Полуволны Напряжения

Королев¹,

Ландль²,

Гейман³

et al. 2017

Журнал Технической Физики

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Исследованы особенности работы металлокерамического тиратрона типа ТPI1-10k/50 в электрических цепях, включающих емкость, индуктивность и активное сопротивление при параметрах цепи, когда ток имеет колебательный характер. Эксперименты проведены при анодном напряжении до 30 kV, токе в прямом направлении до 7.6 kA и длительности первого полупериода тока от 0.38 µs до 1.9 µs. Получены данные по режимам работы, в которых тиратрон может коммутировать обратную волну тока и когда имеет место обрыв тока во втором полупериоде. Показано, что в процессе обрыва через тиратрон в обратном направлении протекает некоторый ток. Его величина и максимальное обратное напряжение на тиратроне определяют, будет ли происходить обрыв тока или повторный пробой прибора на обратном напряжении. При максимальном обратном токе на уровне нескольких сотен ампер полный обрыв тока происходит при обратных напряжениях вплоть до 12 kV. Обсуждены физические механизмы обрыва тока.

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