Improvement of high-current large-volume discharge with profiled hollow-cathode electrodes

Chang, Jim J.; Arnold, Phil; Warner, B. E.

doi:10.1109/27.602517

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…In the calculation of this equation, the measured value of the zero length voltage 285 V was used as V c . Figure 11 shows the Chang et al [30] have reported that the thermal instability, which is a local perturbation of the electron or gas density that enhances local joule heating, mainly caused the discharge filamentation. The dissipated energy density in the cathode fall region H can be calculated using the following equation…”

Section: Dissipated Energy For Glow-to-arc Transitionmentioning

confidence: 98%

Characteristics of a high-current transient glow discharge in dry air

Takaki

Kitamura

Fujiwara

2000

J. Phys. D: Appl. Phys.

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The transition of a high-current glow to an arc and the energy dissipation during the glow phase have been investigated in dry air by static breakdown. The measurements have been made for uniform-field gaps up to 2 cm at gas pressures of 1-20 Torr. A low-inductance capacitor of 1.89 µF and a discharge circuit with a coaxial system were used to produce a transient glow discharge with a current in excess of 400 A. The experimental results showed that the high-current glow discharge occurred at a cathode current density of 3.2 A cm-2, which is almost two orders larger than the value deduced from the formula for Cu-air normal glow; jn = 240×10-6p2, where jn and p are the current density and gas pressure, respectively. The transition from the glow to an arc starts to develop in the discharge region near the cathode. The energies dissipated in the discharge or in the cathode fall region during the glow phase depend on the gas pressure and/or the electrode separation. However, the dissipated energy density in the cathode fall region during the glow phase is independent of the gas pressure and the electrode separation, and is approximately 0.035 J cm-3 in the present experiment.

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Section: Dissipated Energy For Glow-to-arc Transitionmentioning

confidence: 98%