Plasma

Calculation and experimental determination of the length of a laser spark in gas-jet targets

A. N. Nechai, V. E. Guseva, A. A. Perekalov, N. I. Chkhalo

Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod

Abstract: The paper presents the results of studying the sizes of laser sparks formed during excitation of gas-jet targets based on argon, krypton and xenon by pulsed radiation of a Nd:YAG laser with a pulse duration of 4 ns and a pulse energy of 0.8 J. Images of laser plasma were obtained using an X-ray two-mirror microscope based on a Schwarzschild objective with fivefold magnification, operating at a wavelength of 11.25 nm. Gas-jet targets were studied at a gas pressure at the nozzle inlet of 2–10 bar. The values of spark lengths obtained from the experiment were compared with theoretically calculated values.

Keywords: laser spark, EUV radiation, gas-jet targets.

Received: 31.10.2024
Revised: 23.01.2025
Accepted: 20.02.2025

DOI: 10.61011/JTF.2025.07.60650.376-24

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