High Voltage Triggered Spark Gap with Repeatable Gas Filling Structure

Tian, Zuo Xi

doi:10.4028/www.scientific.net/amm.432.373

Cited by 4 publications

(1 citation statement)

References 1 publication

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“…The spark switches have been used to achieve these overly de mand ing con di tions [5,6]. The func tioning of the spark switches is based on bring ing the ex ternal en ergy with a two-elec trode sys tem iso lated with revers ible di elec trics, thus caus ing the break down.…”

Section: Introductionmentioning

confidence: 99%

Optimization of fast three-electrode spark gaps isolated with a SF6 and he mixture

et al. 2021

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This paper considered the possibility of reducing the dissipation of the trigger time of the three-electrode spark gaps with a separated triggered electrode. The work is of a theoretical, numerical and of experimental nature. The experiments were performed on a spark gap model under well-controlled laboratory conditions. It was determined that the results obtained with the model can be applied to the spark gap prototype. Unlike the previous research in this area, the computer-designed spark gap that was used can be triggered with one mechanism only. Also, as opposed to the previous study, a mixture of SF6 and He gases and the third electrode with a double ionization effect were used. The obtained results showed the optimal combination of the construction solution, insulation gas, triggered impulse, and the triggered electrode's shape, reduce the stochastic dissipation of a random variable far in the sub-microsecond field. This result is of great significance for the parallel triggering of current and voltage generators to obtain the best superposition signals.

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Section: Introductionmentioning

confidence: 99%

Optimization of fast three-electrode spark gaps isolated with a SF6 and he mixture

et al. 2021

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Experimental verification of the capillary plasma triggered long spark gap under the extremely low working coefficient in air

Huang

Yang

Huo³

et al. 2016

Physics of Plasmas

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The paper has proposed a new triggering method for long spark gap based on capillary plasma ejection and conducted the experimental verification under the extremely low working coefficient, which represents that the ratio of the spark gap charging voltage to the breakdown voltage is particularly low. The quasi-neutral plasma is ejected from the capillary and develops through the axial direction of the spark gap. The electric field in the spark gap is thus changed and its breakdown is incurred. It is proved by the experiments that the capillary plasma ejection is effective in triggering the long spark gap under the extremely low working coefficient in air. The study also indicates that the breakdown probabilities, the breakdown delay, and the delay dispersion are all mainly determined by the characteristics of the ejected plasma, including the length of the plasma flow, the speed of the plasma ejection, and the ionization degree of the plasma. Moreover, the breakdown delay and the delay dispersion increase with the length of the long spark gap, and the polarity effect exists in the triggering process. Lastly, compared with the working patterns of the triggering device installed in the single electrode, the working pattern of the devices installed in both the two electrodes, though with the same breakdown process, achieves the ignition under longer gap distance. To be specific, at the gap length of 14 cm and the working coefficient of less than 2%, the spark gap is still ignited accurately.

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Study on the breakdown characteristics of the trigatron spark gap triggered by plasma jet

et al. 2020

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The breakdown characteristics of a trigatron spark gap triggered by a plasma jet are studied in this paper; the development of a plasma jet and the influence of the gap distance, working coefficient, and plasma jet ejection properties on breakdown characteristics are compared. The results show that the plasma jet ejecting process can be divided into expanding, steady, and dissipating phases. The electric field distortion induced by the plasma jet is different during the expanding and dissipating phase, in which the plasma jet length increases and the radius of the curvature of the plasma jet front decreases, respectively. As the two processes have different variation rates, a faster increasing rate of the breakdown delay can be obtained during the dissipating phase. A detailed physical mode that explains the effects on the triggered breakdown process is presented. The shape of a plasma jet induced by polyethylene and ceramic surface discharge changes to a great extent during the dissipating phase; a more stable plasma jet can be obtained when induced only by polyethylene, resulting in a smaller breakdown delay under a low working coefficient. The ultraviolet radiation (UV) generated by the plasma jet is effective in reducing the critical breakdown electric field, while the electric field distortion induced by the plasma jet is the main reason behind the triggered breakdown under different working coefficients; the UV could play a limited role in the triggered breakdown process.

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High Voltage Triggered Spark Gap with Repeatable Gas Filling Structure

Cited by 4 publications

References 1 publication

Optimization of fast three-electrode spark gaps isolated with a SF6 and he mixture

Optimization of fast three-electrode spark gaps isolated with a SF6 and he mixture

Experimental verification of the capillary plasma triggered long spark gap under the extremely low working coefficient in air

Study on the breakdown characteristics of the trigatron spark gap triggered by plasma jet

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