Axial flow gas laser - has ion trap grating of nickel at inlet to Roots blower to avoid damage by metal particles

摘要

The axial flow gas laser includes an ion trap grating, to prevent damage due to the presence of metal particles. The laser has two discharge tubes (11,12) coupled to a gas circulation loop (13a,13b) supplied by a Roots blower (14). Ring electrodes (15,16) are convected to an external high voltage supply. A gas bottle (28) provides a limited flow of helium-nitrogen- carbon dioxide gas. The inlet to the Roots blower contains a gas cooler (29) and expansion bellows (21) to provide damping of vibrations. The ion trap grating (30) is located in this section and is manufactured as a mesh of nickel.