Patent ID: 6700908
Filing Date: 2004-03-02
Classification: H01S

Abstract:
Device for avoiding sliding discharges in pre-ionization in a gas laser with corona discharge, comprising:a pair of main electrodes provided in a closed gas discharge volume; and at least one pair of corona electrodes which are arranged in the immediate vicinity of said pair of main electrodes, wherein the individual electrodes of the at least one pair of corona electrodes include a tube-like sheathing of dielectric material having a specific capacitance per unit area in a surface region on the ends of the sheathing that is lower than a capacitance per unit area in a central region of the sheathing between ends of the sheathing, and the individual electrodes of the at least one pair of corona electrodes are open on both ends and contain an electrically conducting rod, or core, introduced into the interior and projecting beyond the sheathing on both ends.