Observation of Laser-Induced Spark in the Density Jump in a Gas-Jet Target
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In the design of powerful laser-plasma sources of extreme ultraviolet radiation with a gas jet as the target, the problem of degradation of gas nozzles is topical. Degradation is observed due to insufficient distance from the generation zone of the laser-induced spark to the nozzle exit. The comprehensive solution to this problem is proposed by forming the laser-induced spark in the density jumps that are generated upon deceleration of the supersonic gas jet. In such a density jump, the laser-induced spark is obtained and measurements of emission radiation intensity are performed.
Keywords:extreme ultraviolet radiation degradation of gas nozzles density jumps laser-induced spark.
This work was supported by the Russian Science Foundation, project no. 17-12-01227.
CONFLICT OF INTEREST
The authors declare that they have no conflict of interest.
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