Breakdown voltages of pseudospark in He, A, and N2

Breakdown voltage of the Pseudospark is expressed in terms of power functions of gap width and gas pressures of Helium, Argon and Nitrogen down to the vacuum discharge region. The effect of the substitution of d by deff on the powers n of pressure, m of gap width, and their ratio n/m is discussed. Paschen rule is found applicable for Pseudospark when d is substituted by deff.link_to_subscribed_fulltex

Electric characteristics of pseudo-spark during breakdown phase

An analysis of the time-dependent resistive voltage and power deposition during the breakdown phase of pseudo-spark is presented. The voltage and current were measured by specially designed low-inductance capacitive voltage divider and current measuring resistor. The measured waveforms of voltage and current are digitized and processed by a computer program to remove the inductive component, so as to obtain resistive voltage and power deposition. The influence of pressure, cathode geometry and charging voltage of storage capacitors on the electrical properties in the breakdown phase are investigated. The results suggest that the breakdown phase of pseudo-spark consists of three stages. The first stage is mainly hollow cathode discharge. In the second stage, field-enhanced thermionic emission takes place, resulting in a fast voltage drop and sharp rise of discharge current. The third stage of discharge depends simply on the parameters of the discharge circuit.link_to_subscribed_fulltex