Observation of Laser-Induced Spark in the Density Jump in a Gas-Jet Target


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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.

About the authors

A. N. Nechai

Institute for Physics of Microstructures, Russian Academy of Sciences

Author for correspondence.
Email: nechay@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603087

A. A. Perekalov

Institute for Physics of Microstructures, Russian Academy of Sciences; Lobachevsky State University of Nizhny Novgorod

Email: nechay@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603087; Nizhny Novgorod, 603022

N. I. Chkhalo

Institute for Physics of Microstructures, Russian Academy of Sciences

Email: nechay@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603087

N. N. Salashchenko

Institute for Physics of Microstructures, Russian Academy of Sciences

Email: nechay@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603087

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