Trigger devices for pseudospark switches

Mehr, T.; Arenz, H.; Bickel, Peter G.; Christiansen, J.; Frank, K.; Gortler, A.; Heine, F.; Hofmann, Dieter; Kowalewicz, R.; Schlaug, M.; Tkotz, R.

doi:10.1109/27.402320

Cited by 69 publications

(24 citation statements)

References 8 publications

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“…[1][2][3] The principle of function of the switch resembles that of a classical thyratron with a grounded grid. Then the terms cold-cathode thyratron or grounded-grid thyratron are also used in the current literature.…”

Section: Introductionmentioning

confidence: 99%

“…Then the terms cold-cathode thyratron or grounded-grid thyratron are also used in the current literature. [4][5][6][7] In early [1][2][3][4][5] and present-day [6][7][8][9][10][11][12][13][14][15][16] publications, there are described a variety of switch prototypes for different applications on the basis of the demountable experimental chambers with external gas filling. As a result of the investigations, the sealed-off switches had been developed 5 in which the operating gas pressure is maintained due to a heated hydrogen reservoir.…”

Section: Introductionmentioning

confidence: 99%

“…A great variety of the triggering methods can be used for the switches with auxiliary glow discharge. 3,[5][6][7] The methods seem to be convenient to classify in two categories. One of them corresponds to the so-called electric circuit of classical thyratron.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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“…This means that in initial conditions, the main gap can be irradiated from the auxiliary discharge and such an irradiation can result in a decrease in the switch holdoff voltage. Besides that, in most of the designs, a pulsed trigger voltage of more than 2 kV should be applied to the trigger unit [4].…”

Section: Introductionmentioning

confidence: 99%

Low-voltage triggering for a pseudospark switch with an auxiliary glow discharge

Korolev¹,

Geyman²,

Франц³

et al. 2001

IEEE Trans. Plasma Sci.

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Different electric circuits for triggering the switch with a trigger unit based on an auxiliary glow discharge are discussed. Most attention is concentrated on the recent experimental results on low voltage triggering of the switch and on the mechanisms for the main discharge initiation under the action of the trigger pulse. Due to modifications in the trigger electric circuit, the switch is triggered starting from a voltage of 50 V at a current level in the trigger circuit of 10 mA. With a voltage of 200-250 V and a trigger current of about 0.25 A, the delay time to triggering does not exceed 200 ns.Index Terms-Anode voltage drop region, cathode voltage drop region, hollow cathode pulsed discharge, pseudospark switch, steady state glow discharge.

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“…[1][2][3] Two major discharge phases have been identified, which are responsible for the features and application possibilities of the discharge: ͑i͒ a transient hollow cathode discharge and ͑ii͒ a high-current or superemissive phase.…”

Section: Introductionmentioning

confidence: 99%

First experimental observation of the ignition of a ‘‘superdense glow’’ before the glow-to-arc transition in a pseudospark discharge

Stetter

Felsner

Christiansen

et al. 1996

Journal of Applied Physics

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The presented results are the first experimental indication for the existence of a homogeneous superdense glow in the bore hole of the cathode in a pseudospark discharge. The start of this mechanism is leading to the low-impedance high-current phase and starts before the glow-to-arc transition in the pseudospark discharge. It is assumed that the high-current density is carried mainly by metal ions which originate from a self-sustained self-sputtering mechanism, or by a large number of, on a macroscopic scale, homogeneously distributed Schottky emitters. It is shown that the geometric features of the bore hole cause an enhancement of this effect. These results and the theoretical assumptions can also explain very effectively the current quenching of the pseudospark discharge. Current quenching is only occurring during the superdense glow when no cathode spots are ignited.

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Trigger devices for pseudospark switches

Cited by 69 publications

References 8 publications

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

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

Low-voltage triggering for a pseudospark switch with an auxiliary glow discharge

First experimental observation of the ignition of a ‘‘superdense glow’’ before the glow-to-arc transition in a pseudospark discharge

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