This article is cited in 4 papers

Observation of laser-induced spark in the density jump in a gas-jet target

A. N. Nechai^a, A. A. Perekalov^ab, N. I. Chkhalo^a, N. N. Salashchenko<sup>a

a</sup> Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod
^b National Research Lobachevsky State University of Nizhny Novgorod

Abstract: 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.

Received: 30.04.2019
Revised: 18.06.2019
Accepted: 18.06.2019

DOI: 10.21883/PJTF.2019.19.48310.17862

 English version: Technical Physics Letters, 2019, 45:10, 970–972

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