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Type: Artigo de evento
Title: On Correction Factor In Scaling Law For Low Pressure Dc Gas Breakdown
Author: Ronchi G.
Machida M.
Abstract: The low pressure gas breakdown described by Paschen's law in Townsend theory, i.e. the breakdown voltage as a function of gas pressure p and the electrode distance d, provides an accurate description of breakdown in DC discharges when the ratio between inter-electrode gap distance d and electrode radii R tends to zero. On increasing of the ratio d/R, the Paschen's curves are shifted to the region of higher breakdown voltage and higher pd values. A modified Paschen's law recently proposed is well satisfied in our measurements. However, the value of constant b changes not only due to gas type but also according to electrode gap distance; furthermore, gas breakdown voltages are considerably modified by plasma-wall interactions due to glass tube proximity in the discharge.
Editor: Institute of Physics Publishing
Rights: aberto
Identifier DOI: 10.1088/1742-6596/511/1/012002
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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