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Investigation of the emission properties of gas-jet targets in the water transparency window" of 2.3-4.4 nm under pulsed laser excitation

Russian version

DOI: 10.21883/TP.2022.08.54563.72-22

Guseva V. E.¹, Nechay A. N.², Perekalov A. A.², Salashchenko N. N.², Chkhalo N. I.²

¹Lobachevsky State University, Nizhny Novgorod, Russia
²Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia

Email: nechay@ipm.sci-nnov.ru, perekalov@ipmras.ru

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Abstract
References
Статистика просмотров

The article considers the results of studying the emission radiation of Ar, Kr, CO₂, CHF₃, CF₄ and N₂ gas jets excited by pulsed laser radiation. The shape of the spectral dependence in the spectral range 2.3-4.4 nm and the emission intensity of a number of lines in absolute units were studied. To excite the targets, a Nd : YAG laser, λ=1064 nm, tau=5.2 ns, E_imp=0.8 J was used. A supersonic conical nozzle with d_cr=450 μm, 2α=11^o, L=5 mm was used to form a pulsed gas jet. The pressure at the nozzle inlet was 25 bar, which corresponds to the developed condensation of molecular gases in gas jets. The spectra were deciphered and the ions emitting under the given experimental conditions were determined. Keywords: gas jets, shock waves, extreme ultraviolet radiation, emission spectra, laser plasma, X-ray spectrometer monochromator.

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