Abstract
The problem of degradation of gas nozzles is relevant in designing of high-power laser-plasma sources of extreme ultraviolet radiation with a gas jet as a target. Degradation is observed due to insufficient removal of the zone of formation of a laser spark from the nozzle exit. A cardinal solution of this problem is proposed due to the formation of a laser spark on shock waves, which are specially formed during the outflow of a supersonic gas jet. In this work, a laser spark was obtained on a similar shock wave and the emission intensity was measured as a function of the geometrical location of the spark formation.
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