Relation between Breakdown Voltage and Pre-Breakdown Current in Vacuum Gap

Catheter-mediated electrical ablation: the relation between current and pulse width on voltage breakdown and shock-wave generation.

Barotrauma from arc induced shock waves may result in dangerous sequelae during ablation of arrhythmogenic foci. In this report, maximum pulse amplitude and pulse width determinations were made to assess avoidance of shock-wave generation using rectangular constant current pulses. Energy delivery appears to be optimal between 80-100 microseconds. If higher energies are required, multiple pulses...

Breakdown Voltage of High-voltage GaN FETs

GaN FETs offer superior advantages in high-voltage and high-temperature operation due to its large bandgap (3.4 eV) and high breakdown field strength (3.3 MV/cm). This combination of the large bandgap and high breakdown field makes these devices very attractive for power switching applications. In this regard, a key figure of merit is the breakdown voltage of the transistor, which must be high ...

The Study of Breakdown Voltages for Triggered Spark Gap Switches

This study explains the breakdown mechanism in different triggered spark gap switches. Two different trigger electrode configurations are tested for the switch predischarge operation in a nitrogen laser circuit. The behavior of the breakdown voltage, when a trigger pulse is applied to the trigger electrode, is investigated, and the results are reported. Based on the experimental measurements ne...

The Spontaneous Breakdown of the Vacuum

In his 1951 paper, J. Schwinger 2 predicted that an intense static electric field will break down the vacuum to produce ee pairs. This occurs when the field-strength approaches the critical value Ec = m c/eh̄ = 1.3× 10 V/cm. We argue that this effect has been observed in the scattering of high energy electrons from the focus of an intense laser pulse . The experimental conditions 1 differ from t...

Breakdown behaviour of high-voltage GaN-HEMTs