Modeling of switching delay in gas-insulated trigatron spark gaps

Abstract

Articles you may be interested inSlightly uneven electric field trigatron employed in tens of microseconds charging time Rev. Sci. Instrum. 85, 093507 (2014); 10.1063/1.4895831 Energy loss in spark gap switches Phys. Plasmas 21, 043513 (2014); 10.1063/1.4873706Effect of the gap on discharge characteristics of the three-electrode trigatron switch A simple ultraviolet radiation-triggered switch with an electric field distortion gap for long-lifetime electrodes Rev.Based on the gas discharge theory involving distorted E-field enhancement, a physical model is proposed to estimate the switching delay for gas-insulated trigatron spark gaps with a trigger pin inside the main electrode. Two discovered breakdown modes, i.e., fast-breakdown mode (FBM) and slow-breakdown mode (SBM), can be unified in this model. Raether criterion can distinguish these two modes. If the main E-field and enhanced E-field near the trigger pin tip are great enough, FBM forms easily. Otherwise, if streamer development needs to rely on the second ionization process and relevant distorted E-field enhancement, the breakdown of the main gap would turn into SBM. The enhanced E-field near the trigger pin tip may affect the threshold main E-field of FBM. The distorted E-field enhancement may affect the switching delay length of SBM. V C 2012 American Institute of Physics. [http://dx.

An Innovative Simple Method for Study of the Characteristics of the Trigatron Plasma Switch

“…), T.S is the trigatron switch, V.P is the voltage-probe (ratio 1000 V to 1 V output voltage) P6015 A Tektronix, C.T is the current transformer (ratio 40 A to 1 V) 1025 Pearson elec. As it can be seen the under-damped-oscillation is dominant in the case of switch-on, as is reported by [12], so the curve fitting of digital recorded data of discharge current to relation 1 is reasonable as is shown in figure 3. The values of the pressure, voltage and distance between the trigatron electrodes, as the experimental parameters, are given in Table1.…”

“…Hence this switch needs to triggerpulse voltage near 20-30 keV for converting the ambient gas to the high conductive arc plasma and getting switchon condition. Because of these wide area of applications its different parameters are experimentally and theoretically, investigated [10][11][12]. Furthermore, the trigatron switch can be utilized in different polarization of driver-voltage pulse relative to main-bias voltage and this capability, causes at the same time, having a good control and short switch-on time as is researched before [9].…”

Enhanced radial growth of Mg doped GaN nanorods: A combined experimental and first-principles study

“…Also, the Mg incorporation was also found to influence the morphology of the grown NRs strongly. A small amount of Mg can increase the tendency of the rods to coalesce while keeping their diameter unchanged without any broadening or tapering [17].…”

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

“…The num - ber of con tour and con trol points were set au to mat ically de pend ing on the de sired ac cu racy (which was high). Fig ure 5 shows an ex am ple of an elec tric field cal cu la tion de scribed by a three-elec trode spark gap method that ac com plished the trig ger re quire ment by the Mech a nism I [31][32][33].…”