XXVI International Symposium "Nanophysics and nanoelectronics", N.Novgorod, 14 - 17 March 2022
Photonics

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

V. E. Guseva^a, A. N. Nechai^b, A. A. Perekalov^b, N. N. Salashchenko^b, N. I. Chkhalo<sup>b

a</sup> Lobachevsky State University, 603950 Nizhny Novgorod, Russia
^b Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod

Abstract: The article considers the results of studying the emission radiation of Ar, Kr, CO$_2$, CHF$_3$, CF$_4$ and N$_2$ 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, $\lambda$ = 1064 nm, $\tau$ = 5.2 ns, $E_{imp}$ = 0.8 J was used. A supersonic conical nozzle with $d_{\mathrm{cr}}$ = 450 $\mu$m, 2$\alpha$ = 11$^\circ$, $L$ = 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.

Keywords: gas jets, shock waves, extreme ultraviolet radiation, emission spectra, laser plasma, X-ray spectrometer monochromator.

Received: 05.04.2022
Revised: 05.04.2022
Accepted: 05.04.2022

DOI: 10.21883/JTF.2022.08.52781.72-22

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